task stringclasses 4
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values | instruction stringlengths 66 14k | response stringlengths 13 8.89k | id stringlengths 68 68 | parent_id stringlengths 64 64 |
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Coding | codecontest | Write Python code to solve the task.
Mary has just graduated from one well-known University and is now attending celebration party. Students like to dream of a beautiful life, so they used champagne glasses to construct a small pyramid. The height of the pyramid is n. The top level consists of only 1 glass, that stands... | Step 1: To solve this problem, we need to simulate the process of pouring champagne into the glasses of the pyramid.
Step 2: We can use a 2D array to represent the glasses in the pyramid and iterate through each glass, simulating the flow of champagne.
Step 3: We need to track the amount of champagne that overflows ... | ec0df88187c62cd2dbc09b8c312a63cee81fae9c4bfabbc11ba2b31402fd5535_1_1 | e470c10daa398f6064998372a57d3268818bc01c1f2de3cef9f6c5222f9e3404 |
Coding | codecontest | Write Python code to solve the task.
One day, Yuhao came across a problem about checking if some bracket sequences are correct bracket sequences.
A bracket sequence is any non-empty sequence of opening and closing parentheses. A bracket sequence is called a correct bracket sequence if it's possible to obtain a correct... | Step 1:
The problem requires us to connect some bracket sequences into ordered pairs such that the concatenation of the bracket sequences in each pair results in a correct bracket sequence. We need to determine the maximum number of pairs that can be made while ensuring that each bracket sequence occurs in at most one... | 21d27c898d00913f9f495c11c9692eaf2d13f8c313a2b6578eb8bd3bddb4a36a_1_1 | 81a1eebf5c6ff9e8e489170490d5af7c2c9ea6c02b5933132408b7ae6187f850 |
Coding | codecontest | Write Python code to solve the task.
One day, Yuhao came across a problem about checking if some bracket sequences are correct bracket sequences.
A bracket sequence is any non-empty sequence of opening and closing parentheses. A bracket sequence is called a correct bracket sequence if it's possible to obtain a correct... | Step 1: The problem requires finding pairs of sequences such that their concatenation forms a correct bracket sequence.
Step 2: We can perform the following steps:
Step 3: 1. Process each individual bracket sequence to check if it is already a correct bracket sequence or if it can be used to balance another sequence... | d0509d17e46a591ffac9c7ee525c093c63038543d6cdc3ad0963564c9312aa60_1_1 | 81a1eebf5c6ff9e8e489170490d5af7c2c9ea6c02b5933132408b7ae6187f850 |
Coding | codecontest | Write Python code to solve the task.
There are n districts in the town, the i-th district belongs to the a_i-th bandit gang. Initially, no districts are connected to each other.
You are the mayor of the city and want to build n-1 two-way roads to connect all districts (two districts can be connected directly or throug... | Step 1: To solve this problem, we need to ensure that all the districts are reachable from each other while satisfying the condition that any two districts belonging to the same gang are not directly connected.
Step 2: We can achieve this by creating roads between districts such that no pair of directly connected dis... | 7c71c50ab0d028eace171d584d8c25667539476d766523a9f832407ab662d609_1_1 | e10db3c3d2bbc1f7ad47d28f692f2f57d50bd0e05c15403bbd45a8f2784d1814 |
Coding | codecontest | Write Python code to solve the task.
There are n districts in the town, the i-th district belongs to the a_i-th bandit gang. Initially, no districts are connected to each other.
You are the mayor of the city and want to build n-1 two-way roads to connect all districts (two districts can be connected directly or throug... | Step 1: The problem is to connect all districts with n-1 roads, such that districts belonging to the same gang are not connected directly.
Step 2: To solve this problem, we can iterate through the districts and check if there are any direct connections between districts belonging to the same gang.
Step 3: If such c... | 9a76062c6aa6c4915a0cf5fb2bc2b29e97c0372071d82e2d5d14213a64b9ff15_1_1 | e10db3c3d2bbc1f7ad47d28f692f2f57d50bd0e05c15403bbd45a8f2784d1814 |
Coding | codecontest | Write Python code to solve the task.
Japanese video game company has developed the music video game called Step Step Evolution. The gameplay of Step Step Evolution is very simple. Players stand on the dance platform, and step on panels on it according to a sequence of arrows shown in the front screen.
There are eight ... | Step 1: To solve this problem, we need to process the input sequence of direction arrows and determine the number of times "Natural footstep style" is violated when optimally playing with the edit data.Step 2: We can simulate the process of playing the game with the given sequence of direction arrows and update the p... | 53fc7e55791f1b0e77caa5e5cfd3fe97707a8828f0b7cafbb61142f581b50200_1_1 | ec0529bee61b19aec0c3182e7f9fadc8eb9cb8d5559adb16bd84d5370c89a31f |
Coding | codecontest | Write Python code to solve the task.
Japanese video game company has developed the music video game called Step Step Evolution. The gameplay of Step Step Evolution is very simple. Players stand on the dance platform, and step on panels on it according to a sequence of arrows shown in the front screen.
There are eight ... | Step 1: The problem involves tracking the player's steps when playing a music video game called Step Step Evolution. The goal is to determine the minimum number of times a player has to violate the "Natural footstep style" when playing optimally based on a given sequence of direction arrows.
To solve this problem:
1. ... | c6f63c6fe83077bc26e2f4160a15d72a23c0d4003c97ef3bffa5d0b41f9fadeb_1_1 | ec0529bee61b19aec0c3182e7f9fadc8eb9cb8d5559adb16bd84d5370c89a31f |
Coding | codecontest | Write Python code to solve the task.
In this problem your goal is to guess some secret permutation A of integers from 1 to 16.
There are 17 tests in this problem. Test number i for 1 ≤ i ≤ 16 will have the following form:
the first line of the input contains string "ELEMENT" (without quotes)
the second line of the in... | Step 1: The problem consists of guessing a secret permutation A of integers from 1 to 16 by processing 16 tests. The tests provide some information about the secret permutation. The final test requires a program to output some permutation of integers from 1 to 16 as a guess at the secret permutation A.
Step 2: The pr... | c6d43b52253db7856bdacd307d4ed289f0a26d7fac31226446b9fe6bf6aad0d5_1_1 | d7efbb7a20fc5c3fc72b22a90987dee167581d7357d7c8ef285802222426d01b |
Coding | codecontest | Write Python code to solve the task.
In this problem your goal is to guess some secret permutation A of integers from 1 to 16.
There are 17 tests in this problem. Test number i for 1 ≤ i ≤ 16 will have the following form:
the first line of the input contains string "ELEMENT" (without quotes)
the second line of the in... | Step 1: To solve this problem, we need to understand that we are trying to guess a secret permutation A of integers from 1 to 16 by passing 17 tests.Step 2: For each test, we need to read the input and process it accordingly. For the final test, we need to print a permutation of integers from 1 to 16 that might be th... | 11e59e526f1202cdda13e16c5e3ff9a29c7c23111a51210a2721e29cd1e5e192_1_1 | d7efbb7a20fc5c3fc72b22a90987dee167581d7357d7c8ef285802222426d01b |
Coding | codecontest | Write Python code to solve the task.
Constraints
* H is an integer between 2 and 50 (inclusive).
* W is an integer between 2 and 50 (inclusive).
* s_{i, j} is `.` or `#` (1 \leq i \leq H, 1 \leq j \leq W).
* s_{1, 1} and s_{H, W} are `.`.
Input
Input is given from Standard Input in the following format:
H W
s_{1, ... | Step 1: The provided code is attempting to solve a problem where Snuke is playing a puzzle game and needs to find the maximum score he can achieve.Step 2: The game is represented as a grid of characters, where each cell can be either `.` or `#`.Step 3: Snuke can move from one cell to another by moving up, down, left... | 97ce07149ea5b5c0be459cc690b1684780682c1a47b9228d9928054d6804fadd_1_1 | fab0b61a862e6d635dc54eb92c0ef1a0a5036bba2ff95e86cfe7f76bbce3e241 |
Coding | codecontest | Write Python code to solve the task.
Constraints
* H is an integer between 2 and 50 (inclusive).
* W is an integer between 2 and 50 (inclusive).
* s_{i, j} is `.` or `#` (1 \leq i \leq H, 1 \leq j \leq W).
* s_{1, 1} and s_{H, W} are `.`.
Input
Input is given from Standard Input in the following format:
H W
s_{1, ... | Step 1: The code seems to be using BFS (Breadth First Search) to traverse the grid and find the longest path from the start cell to the end cell using '.' as the available path and '#' as the blocked path.Step 2: The code seems to calculate the maximum possible score that can be achieved by specifying different paths... | 1fe3e21fee916165dff30ac5795e8c95a7c76cdc456a11f824e761c53f7ddb86_1_1 | fab0b61a862e6d635dc54eb92c0ef1a0a5036bba2ff95e86cfe7f76bbce3e241 |
Coding | codecontest | Write Python code to solve the task.
Given an integer N. Find out the PermutationSum where PermutationSum for integer N is defined as the maximum sum of difference of adjacent elements in all arrangement of numbers from 1 to N.
NOTE: Difference between two elements A and B will be considered as abs(A-B) or |A-B| whi... | Step 1: To solve this problem, we need to find the maximum value of the PermutationSum for a given integer N.Step 2: We need to consider all possible arrangements of the numbers from 1 to N and calculate the PermutationSum for each arrangement.Step 3: The PermutationSum is defined as the maximum sum of the differenc... | a05129125d094302c40377f018a248776d9ab04ce760189444e9f5a4b5625335_1_1 | 74bea26bf724853f6a0c36033c797146515428682e2e386895f59a0bb324fecc |
Coding | codecontest | Write Python code to solve the task.
Given an integer N. Find out the PermutationSum where PermutationSum for integer N is defined as the maximum sum of difference of adjacent elements in all arrangement of numbers from 1 to N.
NOTE: Difference between two elements A and B will be considered as abs(A-B) or |A-B| whi... | Step 1: The problem requires finding the maximum sum of the difference of adjacent elements in all arrangements of numbers from 1 to N.Step 2: We can achieve this by considering all possible arrangements of numbers from 1 to N, calculating the sum of the absolute differences of adjacent elements for each arrangement,... | 798b661f7418957a6924ce44c3ebd8d23332f73eba182eaffd9c5ae59d865a2e_1_1 | 74bea26bf724853f6a0c36033c797146515428682e2e386895f59a0bb324fecc |
Coding | codecontest | Write Python code to solve the task.
You've gotten an n × m sheet of squared paper. Some of its squares are painted. Let's mark the set of all painted squares as A. Set A is connected. Your task is to find the minimum number of squares that we can delete from set A to make it not connected.
A set of painted squares is... | Step 1: The problem is asking us to find the minimum number of squares that need to be deleted to make the set A not connected.Step 2: To solve this problem, we can start by checking each painted square to see if deleting it would break the connectedness of the set.Step 3: For each painted square, we would delete it... | 1569a59ba04a5fb23862de3910bde7fb7e633210aa2e47f5d303a3473dfc44bc_1_1 | aad34cae6e014b94e0f5549dac11279a5a61d84dfbcf3d48c40bacdbb8e80096 |
Coding | codecontest | Write Python code to solve the task.
You've gotten an n × m sheet of squared paper. Some of its squares are painted. Let's mark the set of all painted squares as A. Set A is connected. Your task is to find the minimum number of squares that we can delete from set A to make it not connected.
A set of painted squares is... | Step 1: The problem requires finding the minimum number of squares that need to be deleted to make the painted squares not connected. If the set of all painted squares is not connected or cannot be made unconnected, the program should output -1. We should consider an algorithm that checks connectivity between the pain... | 9ed86ef3363500c5c30247b6beb369befbc7f003bc8f82640bcf0e6055fa0f1d_1_1 | aad34cae6e014b94e0f5549dac11279a5a61d84dfbcf3d48c40bacdbb8e80096 |
Coding | codecontest | Write Python code to solve the task.
Vitya has learned that the answer for The Ultimate Question of Life, the Universe, and Everything is not the integer 54 42, but an increasing integer sequence a_1, …, a_n. In order to not reveal the secret earlier than needed, Vitya encrypted the answer and obtained the sequence b_1... | Step 1: To solve this problem, we need to compare the given sequence b to the original sequence a obtained through encryption.Step 2: We need to determine whether there exists a permutation of the integers b_i such that the sequence a_i = b_1 ⊕ … ⊕ b_i is strictly increasing.Step 3: To do this, we can use the rules ... | 353ba071135f0c6bf968109632d78cc0b4710247dd18705f7f599ec6b94ec100_1_1 | 798bd5555379f0edf2c326bd0e2c844199119544d8a3b1a752caaf20b331ac2c |
Coding | codecontest | Write Python code to solve the task.
Vitya has learned that the answer for The Ultimate Question of Life, the Universe, and Everything is not the integer 54 42, but an increasing integer sequence a_1, …, a_n. In order to not reveal the secret earlier than needed, Vitya encrypted the answer and obtained the sequence b_1... | Step 1: The given problem requires checking for a permutation of numbers that can be XORed to generate an increasing sequence.Step 2: We should start by converting the input into a suitable data structure for processing.Step 3: Then, we need to find a permutation of the sequence such that the bitwise XOR of the elem... | c5b0a1f27cd570e10265a3e7a9d223d4ab844aec423630a7dab0769d43aa9df8_1_1 | 798bd5555379f0edf2c326bd0e2c844199119544d8a3b1a752caaf20b331ac2c |
Coding | codecontest | Write Python code to solve the task.
Malek has recently found a treasure map. While he was looking for a treasure he found a locked door. There was a string s written on the door consisting of characters '(', ')' and '#'. Below there was a manual on how to open the door. After spending a long time Malek managed to deco... | Step 1: The provided code seems to be a lengthy solution with many auxiliary functions that are not relevant to the problem.Step 2: The main task is to replace each '#' character in the string with one or more ')' characters to make it beautiful.Step 3: We can achieve this by counting the number of '(' and ')' chara... | a54ec4444c34dcf55b44768be99d46585f7f8b6cb657fde681e6e0e8e0e8bb34_1_1 | fc695cb497ebb09cfaf69f2dbc481413bc5cb9a4b7ef0712b37fca16b4294bb5 |
Coding | codecontest | Write Python code to solve the task.
Malek has recently found a treasure map. While he was looking for a treasure he found a locked door. There was a string s written on the door consisting of characters '(', ')' and '#'. Below there was a manual on how to open the door. After spending a long time Malek managed to deco... | Step 1: The problem requires us to analyze each character in the given string and decide how many ')' characters we need to replace each '#' character with to make the string beautiful.Step 2: We need to calculate the number of ')' characters needed for each '#' character based on the count of '(' characters and ')' ... | fe49388b94ae65cfb49a3112497be125bb2c8f058bedb33cb72ec80015f4c840_1_1 | fc695cb497ebb09cfaf69f2dbc481413bc5cb9a4b7ef0712b37fca16b4294bb5 |
Coding | codecontest | Write Python code to solve the task.
Dark with his love for the prime numbers wanted to do some arithmetic so he decided to do some additions.
He wants to generate all prime numbers between two given numbers and add them up and decide whether that addition of numbers is a prime number or not?
Confused, Simply print "... | Step 1: To solve this problem, we need to calculate all the prime numbers between the given range of numbers.Step 2: We can use the Sieve of Eratosthenes algorithm to efficiently calculate prime numbers up to a certain limit.Step 3: After generating the list of prime numbers, we need to sum them up and determine if ... | 17f4fa8b243385532794a071bd3a3b81a64d228068cbe0ba7566e9f3d921547e_1_1 | 7bc35414940ee1654ac26ebcb81d1b49b4fbb7e21851093fc9621ff017447adb |
Coding | codecontest | Write Python code to solve the task.
Dark with his love for the prime numbers wanted to do some arithmetic so he decided to do some additions.
He wants to generate all prime numbers between two given numbers and add them up and decide whether that addition of numbers is a prime number or not?
Confused, Simply print "... | Step 1: The problem requires us to find all the prime numbers between two given numbers and then check if the sum of these prime numbers is also a prime number.Step 2: We need to implement a function to generate prime numbers up to a given limit and another function to check if a given number is prime.Step 3: The ma... | 332d8f84d36207651ba254c52dd93ff566ce03478f5b0dc3217bcb52cfb3aef9_1_1 | 7bc35414940ee1654ac26ebcb81d1b49b4fbb7e21851093fc9621ff017447adb |
Coding | codecontest | Write Python code to solve the task.
Omkar's most recent follower, Ajit, has entered the Holy Forest. Ajit realizes that Omkar's forest is an n by m grid (1 ≤ n, m ≤ 2000) of some non-negative integers. Since the forest is blessed by Omkar, it satisfies some special conditions:
1. For any two adjacent (sharing a sid... | Step 1: The problem involves determining the number of valid configurations of non-negative integers in an n by m grid, where the conditions set by Omkar hold.Step 2: We can use a recursive function and modular arithmetic to efficiently calculate the number of valid configurations. We will also need to use a fast exp... | 06f6f0421c97eff845be636400b9e5114d03062338169d416ceaf4a4f2a142ac_1_1 | e92bb6af1ac15fbf799df0c28f2b3a4dd8dc840553057a6effe886c98e09ee50 |
Coding | codecontest | Write Python code to solve the task.
Omkar's most recent follower, Ajit, has entered the Holy Forest. Ajit realizes that Omkar's forest is an n by m grid (1 ≤ n, m ≤ 2000) of some non-negative integers. Since the forest is blessed by Omkar, it satisfies some special conditions:
1. For any two adjacent (sharing a sid... | Step 1: The problem requires us to determine the number of different assignments of elements in the grid such that two special conditions are satisfied.Step 2: We can start by understanding the special conditions and how they affect the different assignments.Step 3: We need to keep track of the number of valid confi... | 9ef03d88d80c820a613a3801ecf7a55dafc98b33b973ad806f991ff063d62f72_1_1 | e92bb6af1ac15fbf799df0c28f2b3a4dd8dc840553057a6effe886c98e09ee50 |
Coding | codecontest | Write Python code to solve the task.
...Mike the TV greets you again!
Tired of the monotonous furniture? Sick of gray routine? Dreaming about dizzying changes in your humble abode? We have something to offer you!
This domino carpet for only $99.99 will change your life! You can lay it on the floor, hang it on the wal... | Step 1: The given problem describes a scenario in which the virus Hexadecimal assembles her own Domino Carpet. The goal is to determine the number of ways to achieve the intended purpose of the Domino Carpet.Step 2: The problem specifies certain conditions that must be satisfied: each carpet square should be covered ... | bfb8bfa040935602ee2db769d58552334688e1d0cb58b3cd32e0ad6ace6a8953_1_1 | 6d16d5bc32f97c67a8e1ae4758e09eff745a2fa62823e1131482471fffb67836 |
Coding | codecontest | Write Python code to solve the task.
...Mike the TV greets you again!
Tired of the monotonous furniture? Sick of gray routine? Dreaming about dizzying changes in your humble abode? We have something to offer you!
This domino carpet for only $99.99 will change your life! You can lay it on the floor, hang it on the wal... | Step 1: To solve this problem, we must first understand the rules and conditions for laying domino chips in the carpet. Conditions such as each carpet square must be completely covered by a domino chip, no overlap with each other is allowed, and the placement of horizontal domino chips are determined by the placement ... | fdeeeabec5784ef2849785b889aa529bc2aa89958ed05f181fbf7946acd56119_1_1 | 6d16d5bc32f97c67a8e1ae4758e09eff745a2fa62823e1131482471fffb67836 |
Coding | codecontest | Write Python code to solve the task.
Phoebe and Joey are playing cards. They have N decks of cards.
Each deck of cards contain 52 cards:
26 Red cards (2 Aces + 6 Faces + 18 Ranks)
26 Black cards (2 Aces + 6 Faces + 18 Ranks)
They have decided to play with M cards out of these N*52 cards. Phoebe asks Joey to select... | Step 1: The problem involves calculating the number of ways Joey can select M cards with specific restrictions from N decks of cards.Step 2: To solve this, we can use the concept of combinations (n choose r) to calculate the number of ways to select the required number of cards meeting the given criteria.Step 3: We ... | ecb79563a5e025a428faabc04fb9017931cdecfaea76a59d446fca4c86cb4f98_1_1 | 4da6b915db4418009c5de2f3bc36935027a371454cb4cfaa7be7b21688165b2f |
Coding | codecontest | Write Python code to solve the task.
Phoebe and Joey are playing cards. They have N decks of cards.
Each deck of cards contain 52 cards:
26 Red cards (2 Aces + 6 Faces + 18 Ranks)
26 Black cards (2 Aces + 6 Faces + 18 Ranks)
They have decided to play with M cards out of these N*52 cards. Phoebe asks Joey to select... | Step 1: The given problem is about finding the number of ways Joey can select M cards out of N*52 cards with certain restrictions.Step 2: We can approach this problem by using the combination formula as well as the given constraints to calculate the required result.Step 3: The modular operations also need to be take... | bfe8c15679b8c853c19368c35dbcfeab5259a8e6c61a6b2a6989c1d89b45c60c_1_1 | 4da6b915db4418009c5de2f3bc36935027a371454cb4cfaa7be7b21688165b2f |
Coding | codecontest | Write Python code to solve the task.
Baby Badawy's first words were "AND 0 SUM BIG", so he decided to solve the following problem. Given two integers n and k, count the number of arrays of length n such that:
* all its elements are integers between 0 and 2^k-1 (inclusive);
* the [bitwise AND](https://en.wikipedia... | Step 1: To solve this problem, we need to count the number of arrays satisfying the given conditions. These conditions include the range of elements in the array, the bitwise AND operation, and the sum of the elements.Step 2: We need to implement a helper function that calculates the number of arrays based on the giv... | 117492c6b5a43d938c8b5e7cd3fd50cf9fcbd0afb79d27cd16e7df1c9d0c54bc_1_1 | 349e0dac5c7403062718f95fc8a8c3263f33a6d9f5be992e3c24a544a645f03d |
Coding | codecontest | Write Python code to solve the task.
Baby Badawy's first words were "AND 0 SUM BIG", so he decided to solve the following problem. Given two integers n and k, count the number of arrays of length n such that:
* all its elements are integers between 0 and 2^k-1 (inclusive);
* the [bitwise AND](https://en.wikipedia... | Step 1: To solve this problem, we need to count the number of arrays of length n that satisfy certain conditions.Step 2: We need to consider the range of elements, the bitwise AND operation, and the sum of elements of the arrays.Step 3: Specifically, we need to calculate the bitwise AND and the sum of elements for e... | 47858bac680d6139ba82849d00941c5862d657c16739ade894e138e077577479_1_1 | 349e0dac5c7403062718f95fc8a8c3263f33a6d9f5be992e3c24a544a645f03d |
Coding | codecontest | Write Python code to solve the task.
Students of Computer Science Department of SKIT have designed a basic Notepad for the purpose of studying the functioning and advance features in many other text editors.
It is a simple text editor that supports only the following two commands:
"type c" where c is a character: Appe... | Step 1: The problem requires keeping track of the different commands performed and the duration for which they were executed.Step 2: We need to maintain a stack of commands and iterate through it in reverse order.Step 3: The "type" command appends a character to the text, while the "undo" command removes the last t ... | 03d15b1b4b55808e84fa616bb97df34943acebfff9f5ef70f614c03021fe2403_1_1 | 47000fce37658567c513452680e9d7b020230e896ec541106d70525e36900ea5 |
Coding | codecontest | Write Python code to solve the task.
Students of Computer Science Department of SKIT have designed a basic Notepad for the purpose of studying the functioning and advance features in many other text editors.
It is a simple text editor that supports only the following two commands:
"type c" where c is a character: Appe... | Step 1: We need to process each test case and perform the operations one by one. We'll keep track of the text as we go and apply the undo operations in reverse order to manage the text. We need to iterate through the list of operations, perform the type and undo operations, and build the resulting text.```python
# Ste... | 18c506f9b99a7598a69253e45a65f1015f94bedde7351fad2ef50c6fd1bb93f8_1_1 | 47000fce37658567c513452680e9d7b020230e896ec541106d70525e36900ea5 |
Coding | codecontest | Write Python code to solve the task.
Given two binary trees, we consider the “intersection” and “union” of them. Here, we distinguish the left and right child of a node when it has only one child. The definitions of them are very simple. First of all, draw a complete binary tree (a tree whose nodes have either 0 or 2 c... | Step 1: To solve this problem, we need to parse the binary tree expressions and build the trees in a format that's easier to work with.Step 2: We can then implement two functions to calculate the intersection and union of the trees based on these parsed representations.Step 3: We also need to convert the resulting t... | b25f57fecf86ff5a76eac31cdad2ca9fd5a5f85d9d151abc0909c7e484b5e0bd_1_1 | 8e2d58984d65f36cfe0b31acedfe13752bc5f0e58c1d3dc2be5bd9d229b8af46 |
Coding | codecontest | Write Python code to solve the task.
Given two binary trees, we consider the “intersection” and “union” of them. Here, we distinguish the left and right child of a node when it has only one child. The definitions of them are very simple. First of all, draw a complete binary tree (a tree whose nodes have either 0 or 2 c... | Step 1: To solve this problem, we need to consider how to parse the input tree expressions into a form that can be manipulated and then convert the result back into a tree expression.Step 2: We also need to implement functions for intersection and union operations on the parsed tree data structure.Step 3: Then, we c... | b2153f8b311b06d6d394d43b837029c6b02729f9410fbdf38c4e2c646e8774d6_1_1 | 8e2d58984d65f36cfe0b31acedfe13752bc5f0e58c1d3dc2be5bd9d229b8af46 |
Coding | codecontest | Write Python code to solve the task.
Most C/C++ programmers know about excellent opportunities that preprocessor #define directives give; but many know as well about the problems that can arise because of their careless use.
In this problem we consider the following model of #define constructions (also called macros).... | Step 1: The task is to check whether an expression resulting from a chain of macro substitutions meets defined criteria: the substitutions may be rendered into equivalent expressions, taking into account the standard rules of arithmetics.Step 2: There are "suspicious" conditions if there is a change in the order of c... | 0f96cc746ba2365320865f7bda2d9a531537a7a26a4a282ffc127ab44e94838e_1_1 | f90ae2679dcf83575ca3e38c7c1d9e35b0ed081ccfbb50623dd33f3f615cc388 |
Coding | codecontest | Write Python code to solve the task.
Most C/C++ programmers know about excellent opportunities that preprocessor #define directives give; but many know as well about the problems that can arise because of their careless use.
In this problem we consider the following model of #define constructions (also called macros).... | Step 1: The problem requires us to determine if an expression is correct according to the given criterion. Step 2: We need to consider the following syntax of the #define constructions or macros. Each macro has its name and value. Step 3: The value of a macro can be an arithmetic expression consisting of variables, ... | 73891183b59392507f4bd63349b02c57845f9ec4b4276107233c9f324ba62fd5_1_1 | f90ae2679dcf83575ca3e38c7c1d9e35b0ed081ccfbb50623dd33f3f615cc388 |
Coding | codecontest | Write Python code to solve the task.
The CS & IT Department students have been facing tough competitions from each other since ages, in being the best in research & innovation.
This time CS Department is taken the edge over IT Department by designing a special weather predictor device which inputs previous years data a... | Step 1: The problem requires finding the minimum number of operations to be performed to rebuild the distorted code.Step 2: The operation can be adding one or more characters, replacing one character with another.Step 3: We can calculate the minimum unit of time required to rebuild the distorted string based on its ... | 5ab6e473147fc916d729f4a281de526b638f5b728efd2d952d251aa88cc59588_1_1 | 6240eea43eed9cf59eed7c48281565a9add7dd2fb1626bd5c65641294f6c7aff |
Coding | codecontest | Write Python code to solve the task.
The CS & IT Department students have been facing tough competitions from each other since ages, in being the best in research & innovation.
This time CS Department is taken the edge over IT Department by designing a special weather predictor device which inputs previous years data a... | Step 1: We are given two strings, a distorted string D and an actual string S. We need to find the minimum number of operations required to rebuild the distorted string.Step 2: The operations can be replacing one character with another, or adding one or more characters.Step 3: We also need to consider the length of ... | c6e95d6371f8714dd3a4d0b0e787a05fc3fbd723b2e013b0c5a60c54e6703383_1_1 | 6240eea43eed9cf59eed7c48281565a9add7dd2fb1626bd5c65641294f6c7aff |
Coding | codecontest | Write Python code to solve the task.
As you have probably realized up to now that Devu is not a normal guy, he is a very weird and abnormal guy. Normally people have two hands, but Devu has three of them. So he wears three wrist watches on his hands.
Devu loves to write name of his friends on his wrist watches. So he... | Step 1: The problem requires finding the number of valid arrangements of three nonempty strings to attach with the wrist watches.Step 2: We also need to consider restrictions such as the strings being non-prefix of each other and their lengths being less than or equal to N.Step 3: We can employ an algorithm to solve... | 3113c70ab7dfa715870bbf474ef7be61d9ae49d30491357fdb534ce89aa3fe2e_1_1 | 25a77a8df512598d30c82d8478c4464ab6febb58e3273ac0c14ca71c0b9538e2 |
Coding | codecontest | Write Python code to solve the task.
As you have probably realized up to now that Devu is not a normal guy, he is a very weird and abnormal guy. Normally people have two hands, but Devu has three of them. So he wears three wrist watches on his hands.
Devu loves to write name of his friends on his wrist watches. So he... | Step 1: To solve this problem, we are provided with the length limit N for the strings and the number K of distinct English alphabet characters to select from.Step 2: We are required to find valid arrangements for three non-empty strings of length less than or equal to N.Step 3: We need to account for combinations o... | 0667c604409063db24b662b9c5d771939e7e1931441d191dfbf1c8411051e2d5_1_1 | 25a77a8df512598d30c82d8478c4464ab6febb58e3273ac0c14ca71c0b9538e2 |
Coding | codecontest | Write Python code to solve the task.
As the guys fried the radio station facilities, the school principal gave them tasks as a punishment. Dustin's task was to add comments to nginx configuration for school's website. The school has n servers. Each server has a name and an ip (names aren't necessarily unique, but ips a... | Step 1: We need to map the IPs to the server names and add comments to the nginx commands based on the server names.Step 2: We can start by creating a dictionary to store the mapping of IPs to server names.Step 3: Then we can iterate through the commands and add comments based on the mapping.Step 4: We will also ne... | 228aa9d0bce22bbca7ad825c19e96606aa33c210d3fdc2b6a9b379f7ec9edeaf_1_1 | 26f46031c25bb1a25ffe62ff2c993944af009e194d03749dedf6dca703c4053e |
Coding | codecontest | Write Python code to solve the task.
As the guys fried the radio station facilities, the school principal gave them tasks as a punishment. Dustin's task was to add comments to nginx configuration for school's website. The school has n servers. Each server has a name and an ip (names aren't necessarily unique, but ips a... | Step 1: We need to iterate through the commands in the configuration file and add comments with the corresponding server names based on the given IPs.Step 2: We can start by creating a dictionary to map the IPs to their corresponding server names.Step 3: Next, we can iterate through the commands, find the correspond... | d4825543c79da178ee03072c8c661c495ac5e2a8e8f5bc21aaeb2164de53e6ab_1_1 | 26f46031c25bb1a25ffe62ff2c993944af009e194d03749dedf6dca703c4053e |
Coding | codecontest | Write Python code to solve the task.
Sherlock is stuck. There is a N X N grid in which some cells are empty (denoted by ‘.’), while some cells have rocks in them (denoted by ‘#’). Sherlock is on the South of the grid. He has to watch what is happening on the East of the grid. He can place a mirror at 45 degrees on an e... | Step 1: We need to iterate through the grid and check for valid positions to place the mirror to see what's happening on the East side.Step 2: Valid positions are the empty cells where there are no rocks in his line of sight.Step 3: We should be able to use fast input/output to handle the large input data.Step 4: L... | 48673f260ce1c6d3dc938655a53feeeb3fa10ed357814e98264c2f8460977840_1_1 | 568a43cda468c30e72a9690f90d2ca1fdd8ca48dece2135befa9defe063b1c2b |
Coding | codecontest | Write Python code to solve the task.
Sherlock is stuck. There is a N X N grid in which some cells are empty (denoted by ‘.’), while some cells have rocks in them (denoted by ‘#’). Sherlock is on the South of the grid. He has to watch what is happening on the East of the grid. He can place a mirror at 45 degrees on an e... | Step 1: We need to iterate through each cell of the grid and check if it's a valid position to place the mirror to see the East side.Step 2: To do this, we can check the cells diagonally above and below the cell to determine if there are any rocks in the line of sight.Step 3: We need to keep track of the valid posit... | 990eac7e7d6d450a3e337a1e6d0fc63c59f6656d6b0926d5c59d88550e0a6bf7_1_1 | 568a43cda468c30e72a9690f90d2ca1fdd8ca48dece2135befa9defe063b1c2b |
Coding | codecontest | Write Python code to solve the task.
In the school computer room there are n servers which are responsible for processing several computing tasks. You know the number of scheduled tasks for each server: there are mi tasks assigned to the i-th server.
In order to balance the load for each server, you want to reassign s... | Step 1: We need to find a way to balance the load of the servers by reassigning tasks. Step 2: We can start by sorting the array of tasks assigned to the servers in ascending order.Step 3: Then, we can minimize the difference between the most loaded and least loaded servers by moving tasks.Step 4: We should also co... | 2635a40077eaed372595bc48ec640d203b3a36bd7f311aa7baacb19ba1e3107a_1_1 | 5d287cea6e296cd16d01358820fac41053a8decabd88fea4a275a537a2083b60 |
Coding | codecontest | Write Python code to solve the task.
In the school computer room there are n servers which are responsible for processing several computing tasks. You know the number of scheduled tasks for each server: there are mi tasks assigned to the i-th server.
In order to balance the load for each server, you want to reassign s... | Step 1: We need to find the minimum number of seconds required to balance the load of servers.Step 2: This means we need to redistribute the tasks from the most loaded server to the least loaded server.Step 3: We can start by finding the most loaded and least loaded servers, and then calculate the difference in thei... | ff3a62562157e6ceb568de77370e6751a89c304f9b4d159e620ddeb6dd4f5ff8_1_1 | 5d287cea6e296cd16d01358820fac41053a8decabd88fea4a275a537a2083b60 |
Coding | codecontest | Write Python code to solve the task.
On the way to Rio de Janeiro Ostap kills time playing with a grasshopper he took with him in a special box. Ostap builds a line of length n such that some cells of this line are empty and some contain obstacles. Then, he places his grasshopper to one of the empty cells and a small i... | Step 1: We need to determine if there exists a sequence of jumps that will allow the grasshopper to reach the cell with the insect.Step 2: We can start by identifying the initial position of the grasshopper and the position of the insect.Step 3: Then, we need to check if there are any obstacles that will prevent the... | 388b1c8dd603451d94bec4d0cb7928b458f803168a04f7c4c0a912ed9d3b914b_1_1 | 1c42a16112afdda37d272bff9b0b06cc6fe8146ea014562504d1862f7a640bed |
Coding | codecontest | Write Python code to solve the task.
On the way to Rio de Janeiro Ostap kills time playing with a grasshopper he took with him in a special box. Ostap builds a line of length n such that some cells of this line are empty and some contain obstacles. Then, he places his grasshopper to one of the empty cells and a small i... | Step 1: We need to check if there exists a sequence of jumps such that the grasshopper can get from its initial position to the cell with the insect.Step 2: We can start by finding the positions of the grasshopper and the insect, and then check if there is a sequence of jumps that will allow the grasshopper to reach ... | 83ba0f6bca4ccbebff13744a325cc69bdfd1e921eafc83935347bbb49d335029_1_1 | 1c42a16112afdda37d272bff9b0b06cc6fe8146ea014562504d1862f7a640bed |
Coding | codecontest | Write Python code to solve the task.
Akshit and Rahul are playing a game. Initially, two positive integers A and B are written on a blackboard. The players take turns, starting with Akshit. On his or her turn, a player can replace A with A - kB for any positive integer k, or replace B with B - kA for any positive integ... | Step 1: We need to calculate the number of winning positions for each test case based on the given constraints.Step 2: We can start by creating a function to check if a given state is a winning position for Akshit.Step 3: Then, we can loop through all the possible positions within the given range and count the numbe... | 409eef8c71e649f8e3dac7304aff05acdbffd806757a988428397fdd0dcc00a2_1_1 | 31a932a361dcb4d61bd11fccb30642bc5628effacd6a7966f78181c2e0187385 |
Coding | codecontest | Write Python code to solve the task.
Akshit and Rahul are playing a game. Initially, two positive integers A and B are written on a blackboard. The players take turns, starting with Akshit. On his or her turn, a player can replace A with A - kB for any positive integer k, or replace B with B - kA for any positive integ... | Step 1: We need to determine the number of winning positions for Akshit given the initial integers A and B.Step 2: We can start by creating a function to check if a given position (A, B) is a winning position for Akshit.Step 3: Then we can iterate through the range of input values A1 to A2 and B1 to B2, and count th... | 0ac7282bea916efd95fd9a6d9a0a15df41163dc204baa9cd2d606801589d4f47_1_1 | 31a932a361dcb4d61bd11fccb30642bc5628effacd6a7966f78181c2e0187385 |
Coding | codecontest | Write Python code to solve the task.
They say "years are like dominoes, tumbling one after the other". But would a year fit into a grid? I don't think so.
Limak is a little polar bear who loves to play. He has recently got a rectangular grid with h rows and w columns. Each cell is a square, either empty (denoted by '.... | Step 1: We need to iterate through each query and count the number of ways to place a single domino inside the given rectangle.Step 2: To do this, we can create a function to count the ways to place a domino inside a single rectangle.Step 3: We also need to account for the forbidden cells and the boundaries of the r... | dc8805a47dc59e9eb235947b71754be6e85abd0d49352f7a76f6cbefb8234734_1_1 | 76ca22a150eb06ee285db31151f0b0aa3ee972cf6cdc23565a3ee6703214ef08 |
Coding | codecontest | Write Python code to solve the task.
They say "years are like dominoes, tumbling one after the other". But would a year fit into a grid? I don't think so.
Limak is a little polar bear who loves to play. He has recently got a rectangular grid with h rows and w columns. Each cell is a square, either empty (denoted by '.... | Step 1: We need to iterate through each query and determine the number of ways to place a domino inside the given rectangle.Step 2: We can create a function to count the number of ways to place a single domino inside a given rectangle.Step 3: We also need to consider the validity of placing the domino based on the p... | bc36dcff5a4b813b35952d7805c0eed9cf7915e26c74377f7f5e734b2694443b_1_1 | 76ca22a150eb06ee285db31151f0b0aa3ee972cf6cdc23565a3ee6703214ef08 |
Coding | codecontest | Write Python code to solve the task.
Miraya and her best Alice friend are now ending their studies and they are willing to work together in a software company, but before this Alice will be tested by the Miraya through the following procedure,
Miraya is obviously Computer Science person while her best friend belongs to... | Step 1: We need to find the optimal permutation that maximizes the summation of absolute differences of all the consecutive elements of the permutation.Step 2: We can start by generating all possible permutations of the first N natural numbers.Step 3: Then, we can calculate the summation of absolute differences for ... | 882ae737b3fdd79da42d015171ddead29026282bddf9270eca7c1304ce1d81ee_1_1 | 435cd69bc1b58305b83f8cb278a2746588e9fa85a9cde5b0d6442e8c564393e6 |
Coding | codecontest | Write Python code to solve the task.
Miraya and her best Alice friend are now ending their studies and they are willing to work together in a software company, but before this Alice will be tested by the Miraya through the following procedure,
Miraya is obviously Computer Science person while her best friend belongs to... | Step 1: To solve this problem, we need to find the optimal permutation that maximizes the summation of absolute differences of all the consecutive elements of the permutation.Step 2: We can start by understanding how to calculate the summation of absolute differences for a given permutation.Step 3: Then we need to f... | cc88da78c11f712e4d00950c24a8f9600b38352f643672b1b2bc4871236eb250_1_1 | 435cd69bc1b58305b83f8cb278a2746588e9fa85a9cde5b0d6442e8c564393e6 |
Coding | codecontest | Write Python code to solve the task.
Long ago, when Petya was a schoolboy, he was very much interested in the Petr# language grammar. During one lesson Petya got interested in the following question: how many different continuous substrings starting with the sbegin and ending with the send (it is possible sbegin = send... | Step 1: The problem requires finding the number of different continuous substrings starting with a given start identifier and ending with a given end identifier.Step 2: We can solve this problem by iterating through all possible substrings of the input string and keeping track of the unique substrings that start with... | 598e6e20b61ec62ffa516a84f66304cfbb6bf3a1c6a12defd36816112f8a7d10_1_1 | c7ce20229b81157f6f4d18bb28fe277fa2862eed29c2c2fef47a8c42a868755a |
Coding | codecontest | Write Python code to solve the task.
Long ago, when Petya was a schoolboy, he was very much interested in the Petr# language grammar. During one lesson Petya got interested in the following question: how many different continuous substrings starting with the sbegin and ending with the send (it is possible sbegin = send... | Step 1: To solve this problem, we need to find all the continuous substrings of the given string that start with sbegin and end with send.Step 2: We can start by creating a function to find all the substrings of a given string.Step 3: Then we can iterate through the substrings and check if they start with sbegin and... | 8d35b55aa175c0a5c6d2ed5c0288e945aa6b94e283fd5fa462fd9421a2d4c771_1_1 | c7ce20229b81157f6f4d18bb28fe277fa2862eed29c2c2fef47a8c42a868755a |
Coding | codecontest | Write Python code to solve the task.
A linear congruential generator produces a series R(⋅) of pseudo-random numbers by the following for- mulas:
<image>
where S, A, C, and M are all parameters. In this problem, 0 ≤ S, A, C ≤ 15 and M = 256.
Now suppose we have some input string I(⋅), where each character in the str... | Step 1: To minimize the information entropy of the output string O(.), we need to find the parameters S, A, and C that produce the smallest entropy.Step 2: We can start by iterating through all possible combinations of S, A, and C within the given range and generating the output string O(.).Step 3: Then, we can calc... | ed436d0f0ea73f4abff3d07c919d403ac91cbbe50c5f8ec5a474f296da676108_1_1 | 343ee3d7912f844412a7569b900c159140966794c25cde14c34eb47811fea13c |
Coding | codecontest | Write Python code to solve the task.
A linear congruential generator produces a series R(⋅) of pseudo-random numbers by the following for- mulas:
<image>
where S, A, C, and M are all parameters. In this problem, 0 ≤ S, A, C ≤ 15 and M = 256.
Now suppose we have some input string I(⋅), where each character in the str... | Step 1: To minimize the information entropy of the output string O(⋅), we need to find the values of S, A, and C.Step 2: We can start by iterating through all possible values of S, A, and C within the given range [0, 15].Step 3: Then, for each combination of S, A, and C, we calculate the output string O(⋅) using the... | ae1e20ec57bcc919d4824e9b69f75257eaaca4293478c702051324c035e693a2_1_1 | 343ee3d7912f844412a7569b900c159140966794c25cde14c34eb47811fea13c |
Coding | codecontest | Write Python code to solve the task.
Ranjan came to know about competitive programming today and created an
account on Hackerearth.
With his full determination he started to solve his first problem.
He saw a question stated as.
Calculate the sum of numbers from 1 to N as:
for ( i=1;i ≤ N;i++ )
sum += i % MOD;
... | Step 1: The given code calculates the sum of numbers from 1 to N based on a given modulo value and it's suffering from TLE.Step 2: We need to write an efficient code to calculate this sum for a large number of test cases and input values.Step 3: We can optimize the given code by finding a pattern in the sum of modul... | ee78abfc00ba1742c53017eb7426a5ffa68869b95809ca78dd3da00d4a7df9f6_1_1 | f01af08f8c639dceb3ac87df50a06bad211ff3cc21bcac7d976524229f74fd9c |
Coding | codecontest | Write Python code to solve the task.
Ranjan came to know about competitive programming today and created an
account on Hackerearth.
With his full determination he started to solve his first problem.
He saw a question stated as.
Calculate the sum of numbers from 1 to N as:
for ( i=1;i ≤ N;i++ )
sum += i % MOD;
... | Step 1: Ranjan's initial approach uses a loop to iterate from 1 to N and calculates the sum of i % MOD, but this can be inefficient for large values of N.Step 2: We can use a mathematical formula to calculate the sum of i % MOD directly based on N and MOD without iterating through each number.Step 3: Let's find a wa... | 75501908038523c56337b024b035bfcf02bf4f24a383dd490757db3b7515a175_1_1 | f01af08f8c639dceb3ac87df50a06bad211ff3cc21bcac7d976524229f74fd9c |
Coding | codecontest | Write Python code to solve the task.
coastline
Waves rush to the beach every second. There is data that observes and records how many meters the wave rushed beyond the reference point P every second for only T seconds. The data consists of T integers x1, ..., xT, and for each i (1 ≤ i ≤ T), a wave from point P to the ... | Step 1: The given problem describes waves rushing to the beach and recording observations of how far the waves rushed beyond a reference point.Step 2: We need to find out how many seconds a point on the land, some distance L from the reference point, was wet for at least 1 second and up to T seconds.Step 3: We have ... | e14a8255d561f9ff2b275b92d2be757c30a14a53c5ef9b9326a7e8c2a1164549_1_1 | a684f2a746bec77f21b5ec81d4e3755a643b11c08c6c30e52d34734dd724ddde |
Coding | codecontest | Write Python code to solve the task.
coastline
Waves rush to the beach every second. There is data that observes and records how many meters the wave rushed beyond the reference point P every second for only T seconds. The data consists of T integers x1, ..., xT, and for each i (1 ≤ i ≤ T), a wave from point P to the ... | Step 1: To solve this problem, we need to read and process the input for multiple cases. Step 2: For each case, the program needs to calculate and output the time that the point separated by the distance L in the land direction from the reference point P was surely wet between 1 second and T seconds. Step 3: We can ... | fe87cd2992593bfa11d16acdeb0c62d9c06b765633918447bcee053c19c537c3_1_1 | a684f2a746bec77f21b5ec81d4e3755a643b11c08c6c30e52d34734dd724ddde |
Coding | codecontest | Write Python code to solve the task.
Tic-Tac-Toe-Tomek is a game played on a 4 x 4 square board. The board starts empty, except that a single 'T' symbol may appear in one of the 16 squares. There are two players: X and O. They take turns to make moves, with X starting. In each move a player puts her symbol in one of th... | Step 1: The goal is to determine the status of the Tic-Tac-Toe-Tomek game by analyzing the game board and checking for winning combinations.Step 2: We can start by defining a counter function to count the occurrences of 'X', 'O', 'T', and empty squares ('.') in a given string. This will help us check for winning cond... | d8e428ad68d28102c32148e09a0abb6f88ff22705ae62e935096d423991c2a59_1_1 | 5967e06c779a613f40de688fbb2c51202cab6188e668309a5d258e694b01c0da |
Coding | codecontest | Write Python code to solve the task.
Tic-Tac-Toe-Tomek is a game played on a 4 x 4 square board. The board starts empty, except that a single 'T' symbol may appear in one of the 16 squares. There are two players: X and O. They take turns to make moves, with X starting. In each move a player puts her symbol in one of th... | Step 1: The problem requires us to determine the status of the Tic-Tac-Toe-Tomek game on a 4x4 board. The statuses are "X won", "O won", "Draw", or "Game has not completed". Step 2: To do this, we can check for winning combinations such as straight or diagonal rows with 4 symbols belonging to the same player, or cont... | 201d5ec7c67ece4e09d93088bb902b9ea7508adf95b8c998a28302950bea38a5_1_1 | 5967e06c779a613f40de688fbb2c51202cab6188e668309a5d258e694b01c0da |
Coding | codecontest | Write Python code to solve the task.
A monopole magnet is a magnet that only has one pole, either north or south. They don't actually exist since real magnets have two poles, but this is a programming contest problem, so we don't care.
There is an n× m grid. Initially, you may place some north magnets and some south m... | Step 1: The problem involves determining if it is possible to place north magnets in the cells while satisfying certain conditions. The conditions include: 1) at least one south magnet in every row and column, 2) if a cell is black, then it is possible for a north magnet to occupy it, and 3) if a cell is white, then it... | 1fc6f4f5fd7c066d2bac399abc3b3184fbab177813276a83cb426ddbf6dbb2f3_1_1 | 3c64f1935f259672bb3cc56a4c258c94dbaad85440123fa8ad253fd3404427c7 |
Coding | codecontest | Write Python code to solve the task.
A monopole magnet is a magnet that only has one pole, either north or south. They don't actually exist since real magnets have two poles, but this is a programming contest problem, so we don't care.
There is an n× m grid. Initially, you may place some north magnets and some south m... | Step 1: The problem requires determining if it is possible to place magnets in a grid of cells such that specific conditions are met. These conditions involve the placement of north and south magnets, grid cell colors, and the operations involving magnets on the grid. The goal is to determine the minimum number of nort... | a2ffd2b08757182eaf0b5469a0a54336ea963cd10659a00277081a6d9173ba37_1_1 | 3c64f1935f259672bb3cc56a4c258c94dbaad85440123fa8ad253fd3404427c7 |
Coding | codecontest | Write Python code to solve the task.
One day Alice was cleaning up her basement when she noticed something very curious: an infinite set of wooden pieces! Each piece was made of five square tiles, with four tiles adjacent to the fifth center tile:
<image> By the pieces lay a large square wooden board. The board is di... | Step 1: To solve this problem, we need to check if the given board can be fully tiled using the wooden pieces.Step 2: We can start by reading the board matrix and representing the free cells as 0 and occupied cells as 1.Step 3: Then, we need to check if each set of five distinct cells can be covered by a single wood... | e41499dd729f12c36622aeb371a3945360480775722d3b69f4cdae443d8b36ca_1_1 | 7cfeddcfa060eff1a38717559a9e17bf47859a897bc10aed453714735baeb044 |
Coding | codecontest | Write Python code to solve the task.
One day Alice was cleaning up her basement when she noticed something very curious: an infinite set of wooden pieces! Each piece was made of five square tiles, with four tiles adjacent to the fifth center tile:
<image> By the pieces lay a large square wooden board. The board is di... | Step 1: The problem asks us to determine if it's possible to fully tile the board with the given pieces.Step 2: We need to check if each piece can be placed on the board so that no two pieces overlap, and each piece covers exactly five distinct cells of the board.
Step 3: We can represent the board using a matrix wh... | 1a17d6cd75125fb9bbbba9986756cebf1b785ba9f679287a3b5babd79ef5e2ed_1_1 | 7cfeddcfa060eff1a38717559a9e17bf47859a897bc10aed453714735baeb044 |
Coding | codecontest | Write Python code to solve the task.
Problem Statement
We can describe detailed direction by repeating the directional names: north, south, east and west. For example, northwest is the direction halfway between north and west, and northnorthwest is between north and northwest.
In this problem, we describe more detail... | Step 1: To solve this problem, we need to iterate through the input string and calculate the angle represented by the given direction. We need to keep track of the occurrences of "north" and "west" and use this information to calculate the angle.Step 2: We also need to handle the representation of the angle as an int... | 4d37fbb239aa4c95503ca2b0db3089af707da7df51d29dc4fd05b7b47d6401bf_1_1 | b2c3b62ddd9ea06d97d7058f9c836fad7eed9b87cf15c879b5dd1bc02e86f67e |
Coding | codecontest | Write Python code to solve the task.
Problem Statement
We can describe detailed direction by repeating the directional names: north, south, east and west. For example, northwest is the direction halfway between north and west, and northnorthwest is between north and northwest.
In this problem, we describe more detail... | Step 1: To solve this problem, we need to calculate the angle in degrees described by the given direction.Step 2: We can start by reading the input string for each dataset, then check each substring for occurrences of "north" and "west" to calculate the angle.Step 3: We also need to take into account the formula for... | 3f29fff82efdcf75cd932ecef896c80fa50841d58af4db20190541ccea840fd3_1_1 | b2c3b62ddd9ea06d97d7058f9c836fad7eed9b87cf15c879b5dd1bc02e86f67e |
Coding | codecontest | Write Python code to solve the task.
Takahashi will take part in an eating contest. Teams of N members will compete in this contest, and Takahashi's team consists of N players numbered 1 through N from youngest to oldest. The consumption coefficient of Member i is A_i.
In the contest, N foods numbered 1 through N will... | Step 1: To minimize the team's score, we need to find the optimal combination of member training and food allocation that will result in the longest time for an individual member to finish the food.
Step 2: The problem requires implementing a binary search algorithm to find the minimum possible score of the team base... | 0a82b0ce4d8ca0a78435fad763203de2f25fdc63ef03deae25ea187741458dcb_1_1 | 43948de1d296c1e27c7e627bde243a153893b809c03d3b48531c75d962284766 |
Coding | codecontest | Write Python code to solve the task.
B: Nakajima, let's do that! --Match Peas War -
problem
Nakajima "Uhh ..."
Isono "Nakajima, are you okay?"
Nakajima "... I feel like I was having an unpleasant dream."
Isono "What kind of dream do you have?"
Nakajima "Dream to play infinitely"
Isono "I don't know what it means... | Step 1: The problem involves simulating a hand game called "that" where two players attempt to eliminate each other's hands based on specific rules and then determine the winner.
Step 2: We can model the game rules as a recursive function that simulates the players' actions in choosing their moves and outcomes based... | f58339b26b09c17aab532c3d232776732d840c39c08d242028a57f3f81f47346_1_1 | 3bbae311e6dc02d3bf66242517ff8f65001fd80ac41aca96ab2f1bfe9aba7e6f |
Coding | codecontest | Write Python code to solve the task.
You are given the set of vectors on the plane, each of them starting at the origin. Your task is to find a pair of vectors with the minimal non-oriented angle between them.
Non-oriented angle is non-negative value, minimal between clockwise and counterclockwise direction angles. No... | Step 1: The problem requires us to find a pair of vectors with the minimal non-oriented angle between them.
Step 2: We need to be able to calculate angles between vectors and compare them to find the minimum.
Step 3: We can implement a function to calculate the angle between two vectors.
Step 4: Then we can sort th... | c61f45d14285c1f29b06be5b64b0874d782e8ffd5672264e009f714c4531d943_1_1 | a9a9b60451750ccdfb281dbf9bc2e120712cf30718f810f8c6db94f296dce4d4 |
Coding | codecontest | Write Python code to solve the task.
Find the number of integers between 1 and K (inclusive) satisfying the following condition, modulo 10^9 + 7:
* The sum of the digits in base ten is a multiple of D.
Constraints
* All values in input are integers.
* 1 \leq K < 10^{10000}
* 1 \leq D \leq 100
Input
Input is given ... | Step 1: The main idea is to use dynamic programming to count the number of integers that satisfy the condition.
Step 2: We can use a bottom-up approach to calculate the number of integers of a certain length that have a sum of digits that is a multiple of D.
Step 3: We then use this count to find the number of integ... | 4d7a47cdc7c205dfa9357d0dfacb798d40c56ca573adb825e84fd072f845bb14_1_1 | 6590b7f37de345f9afbd168fa74cd3e14e5ac0ac8e59072b83befd3f6cb53d1f |
Coding | codecontest | Write Python code to solve the task.
Convenience store Deven Eleven is planning to open its first store in Aizuwakamatsu City to expand its business. There are already many other convenience stores in Aizuwakamatsu, so the place to open a new store is likely to be the key to success. Under the premise that "customers u... | Step 1:
The given task requires creating a program that calculates the number of blocks that can be covered by a new convenience store. The problem description indicates using a breadth-first search (BFS) approach to solve the problem. The mapper needs to calculate the number of blocks that can be covered most widely ... | f45b8c600fc9e81634c7cb96a9af1dd3e5fa4b81fd166734c8cd664815944e7b_1_1 | 307dfe813fe81fe1097c8568a41e5667ff0c8aea66bf572046b1ffdf41b06575 |
Coding | codecontest | Write Python code to solve the task.
There are N persons, conveniently numbered 1 through N. They will take 3y3s Challenge for N-1 seconds.
During the challenge, each person must look at each of the N-1 other persons for 1 seconds, in some order.
If any two persons look at each other during the challenge, the challen... | Step 1: We need to develop a solution that, given the number of persons, finds an order in which each person looks at each of the other persons for the challenge.
Step 2: We can solve this problem by printing a sequence of persons' indexes according to the given requirements to achieve a successful challenge.
Step 3:... | 631094c4a32511ffe7deddf47c8b1e88517929f553ed9cd6c3edca7cc12ac278_1_1 | 956e991136f073e4c0bb560ddf9adec090169fd430f2b69ed3c8f60fbf4a1517 |
Coding | codecontest | Write Python code to solve the task.
problem
Mobiles are widely known as moving works of art. The IOI Japan Committee has decided to create mobiles to publicize JOI. JOI public relations mobiles are sticks, strings, and weights. It is constructed as follows using the three types of elements of.
* One end of the bar i... | Step 1: The problem involves creating a program to calculate the weight of mobile while balancing all the rods
Step 2: The main approach to solve this problem could be by using a depth-first search (dfs) with a recursive function to handle the input and calculate the weight.
Step 3: The input will be in multiple dat... | b1b939202cfe32f7c67f3c2669c1a050783d931d0aadeb430f8751d63693577d_1_1 | 8e35062fbba60a38b9c14454650845dcd38d2f485e1304e146dfdab5f1cc0f04 |
Coding | codecontest | Write Python code to solve the task.
Let's play Hit and Blow game. A imagines four numbers and B guesses the numbers. After B picks out four numbers, A answers:
* The number of numbers which have the same place with numbers A imagined (Hit)
* The number of numbers included (but different place) in the numbers A imagin... | Step 1: To solve this problem, we need to process multiple datasets of four numbers imagined by A and four numbers chosen by B.
Step 2: For each dataset, we need to compare the numbers and calculate the number of Hits and Blows.
Step 3: We also need to handle the input and output of the datasets.
Step 4: We'll read... | ac3595296532a34a495bfe2ca538932cd7a5f0b2a902628059c241fefc2339c8_1_1 | 6b13ff442e71e4da320f1145a2db29acfd2ca9c0283d675207b6a57809afec12 |
Coding | codecontest | Write Python code to solve the task.
You are working for an administration office of the International Center for Picassonian Cubism (ICPC), which plans to build a new art gallery for young artists. The center is organizing an architectural design competition to find the best design for the new building.
Submitted des... | Step 1:
This problem requires us to determine the stability of a building design based on the center of masses of its pieces. To solve this problem, we need to iterate through the input data and determine whether each piece is stable based on the given rules. We will use a deque for breadth-first search and track the ... | 0fae802d75caafcea3d04af1645453f77fa639d193ec991523b30f036f27c896_1_1 | 8043fb5ca4e9f4db94b3cc92ba4cc6b24ca3885d53f296301d36017eda7f97c7 |
Coding | codecontest | Write Python code to solve the task.
Nauuo is a girl who loves drawing circles.
One day she has drawn a circle and wanted to draw a tree on it.
The tree is a connected undirected graph consisting of n nodes and n-1 edges. The nodes are numbered from 1 to n.
Nauuo wants to draw a tree on the circle, the nodes of the ... | Step 1: The objective of this problem is to count the number of permutations that satisfy the rule for drawing the given tree on a circle.
Step 2: We'll start by processing the input to build the tree structure based on the given edges.
Step 3: Once the tree structure is built, we need to count the number of valid p... | 9cd3218cf880636496706981434229ba6d2eaa4cc593f8f62b1765cc063325f8_1_1 | 3da970c1b473d1841e6c06e1d0544e1172d500b9edd19591034abf0ca33947e2 |
Coding | codecontest | Write Python code to solve the task.
This is 1526 A.D. Third Battle of Panipat between Babur and Ibrahim Lodi, the current ruler of India is going on.
Realising that Lodi has much larger army, Babur planned to attack the cities of India to bring the moral of the soldiers of Lodi down.
Now, Lodi had been ordered by h... | Step 1: To solve this problem, we need to understand the concept of a tree formed by cities and the use of the S.H.I.E.L.D power to protect specific cities.
Step 2: We can start by understanding the constraints and the input format of the problem.
Step 3: Then, we can use the information to determine the number of w... | b895f3dfa52fcd9b3b7c72a913595512ae89ba29932bb1189b3c0afb489aca05_1_1 | 49fc4e0851833df0f481787e1c72f4c6f1dda60dafef1bba4cf111b8265e8150 |
Coding | codecontest | Write Python code to solve the task.
Snuke received a triangle as a birthday present. The coordinates of the three vertices were (x_1, y_1), (x_2, y_2), and (x_3, y_3).
He wants to draw two circles with the same radius inside the triangle such that the two circles do not overlap (but they may touch). Compute the maxim... | Step 1: The problem requires finding the maximum possible radius of two circles that can be drawn inside a given triangle.
Step 2: To solve this problem, we can use the coordinates of the vertices of the triangle and calculate the maximum possible radius of the circles based on the distances between the vertices.
Ste... | 4a5c2bb2ac212d1531a0dea7969d4610bcfb964e618b2539d31c999ab429c116_1_1 | f972a86549153b05d979a89e8341bd586dbba0c7390a0cb2edcffbf4961adbc9 |
Coding | codecontest | Write Python code to solve the task.
As the name of the task implies, you are asked to do some work with segments and trees.
Recall that a tree is a connected undirected graph such that there is exactly one simple path between every pair of its vertices.
You are given n segments [l_1, r_1], [l_2, r_2], ..., [l_n, r_n... | Step 1: The task is to generate a graph with n vertices from given segments and determine if the resulting graph is a tree or not. We can approach this problem by determining if the graph has any cycles or if it has the correct number of edges required for a tree.
Step 2: Then, we need to implement disjoint-set data ... | c384eec701b624820028cf0e34867b0106d7bbca8a7962eb2bc87fa25e389ec1_1_1 | 72c45c0e42e65647bc6f09b16a829d10b5e37a33e837db0e9ef4b43e74f242f3 |
Coding | codecontest | Write Python code to solve the task.
Dr. Evil is interested in math and functions, so he gave Mahmoud and Ehab array a of length n and array b of length m. He introduced a function f(j) which is defined for integers j, which satisfy 0 ≤ j ≤ m - n. Suppose, ci = ai - bi + j. Then f(j) = |c1 - c2 + c3 - c4... cn|. More f... | Step 1: The problem involves performing update queries on a list of elements and calculating a minimum value based on a formula.
Step 2: We need to calculate this formula for different values of j and return the minimum value each time.
Step 3: The algorithm uses some advanced techniques to perform this calculation ... | 57f44ab76136edfe069fc3b3d0c7617a7cec430fd4dcd79fcf25559a7e8aeff4_1_1 | 9b85725da50caaa34cc9c48e2326a0e62d41ce75ab0bbda83ce6864440a15c30 |
Coding | codecontest | Write Python code to solve the task.
Kefa decided to celebrate his first big salary by going to the restaurant.
He lives by an unusual park. The park is a rooted tree consisting of n vertices with the root at vertex 1. Vertex 1 also contains Kefa's house. Unfortunaely for our hero, the park also contains cats. Kefa h... | Step 1: The problem requires us to determine the number of distinct leaves of a rooted tree that are within the defined maximum number of consecutive vertices with cats.
Step 2: To solve this problem, we can use a depth-first search (DFS) algorithm to traverse the tree and count the number of valid leaves.
Step 3: W... | 71dc6c1ff79bcfcb7ec2f1ece67149190d671e09bed5aab2812c33b851ecd9d3_1_1 | e20dc38c3b38eb8c6ea96780e1b5dabfe03600e2288840aa6cb3c220e4312624 |
Coding | codecontest | Write Python code to solve the task.
Vanya decided to walk in the field of size n × n cells. The field contains m apple trees, the i-th apple tree is at the cell with coordinates (xi, yi). Vanya moves towards vector (dx, dy). That means that if Vanya is now at the cell (x, y), then in a second he will be at cell <image... | Step 1: The goal of the problem is to determine the starting cell on the field from which Vanya should begin his path such that he can see as many apple trees as possible.
Step 2: To achieve this, we need to consider Vanya's movement vector and how it affects the visibility of apple trees.
Step 3: We can use arrays ... | 57392b36ebc916c5a4459e5eedc7fa68a0d1d90e0d0f1efa967eae877fbc0878_1_1 | 47c5afc5b33ceeb8f1e7b53078e7093d367ad2f674201211327d2e96a12ac5a8 |
Coding | codecontest | Write Python code to solve the task.
A calculator scholar has discovered a strange life form called an electronic fly that lives in electronic space. While observing the behavior of the electronic flies, the electronic flies at the (x, y, z) point in this space then move to (x', y', z') indicated by the following rules... | Step 1: To solve this problem, we need to determine the minimum number of movements that return to the point (1, 1, 1) for each dataset.
Step 2: We are given multiple datasets with each dataset consisting of six positive integers a1, m1, a2, m2, a3, and m3.
Step 3: We need to find the minimum number of movements for... | 813bc44a6d6c564e9c9f12f49a5216e1e849acdbf7da9676989948a77fdb14b2_1_1 | 4713c97feb13da2db5968340b290684c9ce59d9566f45aa3ccca4bc3f82383f3 |
Coding | codecontest | Write Python code to solve the task.
Chris always struggle in converting angles from degree to radian or vice-verse. You being his best friend whom he trusts so much, decided to help him out. Sam has T angles you need to convert them in radian and represent them in fraction(i.e P/Q) and simplest form.
[Note]: be carefu... | Step 1: The problem requires us to convert a set of angles from degrees to radians and represent the results in fractional form.
Step 2: We can start by implementing a function to calculate the greatest common divisor (gcd) of two numbers.
Step 3: Then, we'll use this function to simplify the fraction and represent ... | 89671c443768bde84944ce050e3b6a694533ee976a06d80bc40318a22e221158_1_1 | 37de0b02cb974332a7f063ced7afb309fca85d1f5cfac8d25a882fb4c1092556 |
Coding | codecontest | Write Python code to solve the task.
The following sorting operation is repeated for the stacked blocks as shown in Fig. A.
1. Stack all the bottom blocks (white blocks in Figure a) on the right edge (the remaining blocks will automatically drop one step down, as shown in Figure b).
2. If there is a gap between the bl... | Step 1: The task is to create a program that outputs the minimum number of operations until the triangle is obtained, based on the given logic.
Step 2: We should loop through each dataset and determine the number of sorting operations performed until the triangle is formed.
Step 3: We need to consider the condition ... | e02da5a71dc2dcf2a301b5641d5bc3f96a392a209525379aa777967c534b0c0a_1_1 | ce0735c35d1ddfcd335e735b983b61c288beebccb7d0e44e29a38b777c497a01 |
Coding | codecontest | Write Python code to solve the task.
Mike received an array a of length n as a birthday present and decided to test how pretty it is.
An array would pass the i-th prettiness test if there is a way to get an array with a sum of elements totaling s_i, using some number (possibly zero) of slicing operations.
<image>
An... | Step 1: The problem defines an array slicing operation and requires checking whether an array passes a prettiness test based on the sum of its elements.
Step 2: We can start by reading the input and sorting the array to simplify the slicing process.
Step 3: Then, we need to keep track of the available sums after per... | 87cfec4b5246a07c7e3f1fc7a553afc6fd39474cd1abc5df538300c44bc8e6f8_1_1 | be1e9883b49d64188c317c324d0b214e6ee6c5697b299d6dba027da7881c646d |
Coding | codecontest | Write Python code to solve the task.
Argus was charged with guarding Io, which is not an ordinary cow. Io is quite an explorer, and she wanders off rather frequently, making Argus' life stressful. So the cowherd decided to construct an enclosed pasture for Io.
There are n trees growing along the river, where Argus ten... | Step 1:
The problem requires us to find the number of different nonzero areas that a triangular pasture may have. To solve this, we need to consider the possible combinations of three trees to form a triangle and calculate the area of the triangle. We should then track the different areas that can be formed and count ... | cc8e72f132a42a8825d3e2f40b99bf7aa53048e7a5656331348dc8f8afd7db3d_1_1 | 7068c669b5e4e4eeecb5b626b60abaac3bf99aca3ce870555c92dfe4b1ebd077 |
Coding | codecontest | Write Python code to solve the task.
After the piece of a devilish mirror hit the Kay's eye, he is no longer interested in the beauty of the roses. Now he likes to watch snowflakes.
Once upon a time, he found a huge snowflake that has a form of the tree (connected acyclic graph) consisting of n nodes. The root of tree... | Step 1: We need to determine the centroid of a tree for each given query.
Step 2: To achieve this, we have to first understand the concept of a centroid of a tree and how to find it.
Step 3: A centroid is defined as a node such that if we remove it from the tree, the maximum size of a connected component will be at ... | 179a5c0b1147cbd4d0e8e55ef4c28cbc0242b859015aff187d45a9647a2e7848_1_1 | 065cb04cd34318b25c815af34958f0574e074393f50d2abd328ba42d88e9cc98 |
Coding | codecontest | Write Python code to solve the task.
Last summer Peter was at his granny's in the country, when a wolf attacked sheep in the nearby forest. Now he fears to walk through the forest, to walk round the forest, even to get out of the house. He explains this not by the fear of the wolf, but by a strange, in his opinion, pat... | Step 1: To solve this problem, we need to calculate the amount of suitable oriented routes for Peter based on the given input n.
Step 2: We can use a series of calculations that involve iterations and modulo operations to derive the result.
Step 3: We should iterate through the input to calculate the suitable orient... | 417167716f2a1aeb0748c17990f538e83e1ae520f376214d5f60c98718087e34_1_1 | 5ad293c73c35bc34fb49de8c379bf9bcf89fc5b0113323a2d9f1ad3d263cc115 |
Coding | codecontest | Write Python code to solve the task.
Andrewid the Android is a galaxy-known detective. Now he does not investigate any case and is eating chocolate out of boredom.
A bar of chocolate can be presented as an n × n table, where each cell represents one piece of chocolate. The columns of the table are numbered from 1 to n... | Step 1: The given problem can be solved by simulating Andrewid's chocolate bar eating process according to the provided actions.
Step 2: To solve the problem:
Step 3: - Read the input values of n and q and the actions (xi, yi, t).
Step 4: - Determine the pieces eaten as a result of each action.
Step 5: - Keep trac... | 7959c115551656de7fa35f8cd890211d1a4292fed17798c8beaf2d3fe71cd77a_1_1 | 4f284889db5f36c3d9d7a2c0477d573e5aaa60e419966754bbc43842473a0f77 |
Coding | codecontest | Write Python code to solve the task.
Sasha is taking part in a programming competition. In one of the problems she should check if some rooted trees are isomorphic or not. She has never seen this problem before, but, being an experienced participant, she guessed that she should match trees to some sequences and then co... | Step 1: We are given a sequence a0, a1, ..., ah, where h is the height of the tree, and ai equals to the number of vertices that are at distance of i edges from the root.
Step 2: We need to match each tree with a sequence a0, a1, ..., ah, and determine if there is one or more than one tree matching the sequence.
Step... | 302884575ce85d4e59ec1b0305033b9071f7f40a99fcabfa1d7ce16162c36010_1_1 | d58b42a48de71f22712c7eab1fabf9e3420516032b5c0151bafeac85c829dcb7 |
Coding | codecontest | Write Python code to solve the task.
You are given an undirected tree consisting of n vertices. An undirected tree is a connected undirected graph with n - 1 edges.
Your task is to add the minimum number of edges in such a way that the length of the shortest path from the vertex 1 to any other vertex is at most 2. Not... | Step 1: The problem requires finding the minimum number of edges to add to ensure that the shortest distance from vertex 1 to any other vertex is at most 2.
Step 2: To solve this problem, we can perform a breadth-first search (BFS) starting from vertex 1 to find all the vertices that are reachable within 2 steps.
Ste... | 54b5a7c38e75176eccb5f9a73b641075853b0c91f01b074109e3fb8edd284d2d_1_1 | 6168ac927dbaf327bea7ac5ea44619c8ffa6803320bef596062d4b34d950e2d1 |
Coding | codecontest | Write Python code to solve the task.
Note that this is the first problem of the two similar problems. You can hack this problem only if you solve both problems.
You are given a tree with n nodes. In the beginning, 0 is written on all edges. In one operation, you can choose any 2 distinct leaves u, v and any real numbe... | Step 1: The problem requires us to determine if it is possible to achieve any configuration of real numbers written on the edges of the tree by performing a finite number of operations.
Step 2: We can solve this problem using graph traversal algorithms to determine if there are any leaf nodes with only one edge conne... | fa9824a7d71a7085d73927de6068f0abd1d37a3107e3f8f9e58b3d7948f79c33_1_1 | fa6af7061e3cd3633a6a239dfd5b73387c9c7630e0c0a2f938aecee34e345f9c |
Coding | codecontest | Write Python code to solve the task.
Vasilisa the Wise from the Kingdom of Far Far Away got a magic box with a secret as a present from her friend Hellawisa the Wise from the Kingdom of A Little Closer. However, Vasilisa the Wise does not know what the box's secret is, since she cannot open it again. She hopes that you... | Step 1: The problem requires checking if a given set of numbers can be placed in a 2x2 square to satisfy certain conditions.
Step 2: We need to calculate the position of the gems based on the given sum of numbers for rows, columns, and diagonals.
Step 3: Then, we need to check if the calculated positions are valid b... | f2cf8abd21ce9fcb7af1b17f4b02c592c339e4b341ea554da58638a4d8de6be1_1_1 | 174f33908e92c64affc733a4a11968ac90d38ce8c52291baa31d4aac65a7e919 |
Coding | codecontest | Write Python code to solve the task.
Petya studies positional notations. He has already learned to add and subtract numbers in the systems of notations with different radices and has moved on to a more complicated action — multiplication. To multiply large numbers one has to learn the multiplication table. Unfortunatel... | Step 1:
Petya needs a multiplication table for numbers in a given radix. We'll need to create a function to convert the products of each combination of i and j in the multiplication table to the given radix. This function will take two numbers (i, j) and the radix k and return the product of i and j in the given radix... | 12df1272891187e38343b14910452345b8a128a630f5f5cf488543b9288e6ef4_1_1 | c84fe875131d814c31d74aa7e89341813b598c537535265be155f275b5213a97 |
Coding | codecontest | Write Python code to solve the task.
At the big break Nastya came to the school dining room. There are n pupils in the school, numbered from 1 to n. Unfortunately, Nastya came pretty late, so that all pupils had already stood in the queue, i.e. Nastya took the last place in the queue. Of course, it's a little bit sad f... | Step 1: The problem involves finding the maximal number of places in the queue that Nastya can move forward by making swaps with other pupils in the queue.
Step 2: We need to understand the initial arrangement of pupils, the pairs of pupils who agree to change places, and the position of Nastya in the queue.
Step 3: ... | e90158b1d4d27c330aade95ff0b5d92be10229348179ae96baee3f97ab60037d_1_1 | 9a7c204f77aa8023fa243e4528c9d325793f6e74c45e279a8dbc5b8e2eefb245 |
Coding | codecontest | Write Python code to solve the task.
There are n cities in Berland and some pairs of them are connected by two-way roads. It is guaranteed that you can pass from any city to any other, moving along the roads. Cities are numerated from 1 to n.
Two fairs are currently taking place in Berland — they are held in two diffe... | Step 1: This is a graph problem where we need to determine the number of pairs of cities for a given configuration of fairs.
Step 2: To solve this, we need to understand the concept of connectivity in a graph.
Step 3: We will utilize the concept of disjoint set union (DSU) to determine the number of pairs.
Step 4: ... | 507ff4bc4b28c971166da9f292ed6169ca3dac44445fcddd3519816bbd8c0042_1_1 | eb28f97125c4dc9969d82dc70ffcba343f4ee32f701f04d456465aac3ba4b0aa |
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