task stringlengths 0 154k | __index_level_0__ int64 0 39.2k |
|---|---|
A-Mazing Puzzle
Description:
The Severely Challenging Archaeological Exploration Division
(SCArED) specializes in the investigation of archaeological
sites that are too difficult, dangerous or downright terrifying
for humans to examine firsthand. Instead they send in one or
more mobile robots to invest... | 26,100 |
A1 Paper
Description:
Björn likes the square root of two, $\sqrt {2} = 1.41421356\dots $ very
much. He likes it so much that he has decided to write down the
first $10\, 000$ digits of
it on a single paper. He started doing this on an A4 paper, but
ran out of space after writing down only $1250$ digits... | 26,101 |
ABC
Description:
You will be given three integers $A$, $B$ and $C$. The numbers will not be given in
that exact order, but we do know that $A$ is less than $B$ and $B$ less than $C$. In order to make for a more
pleasant viewing, we want to rearrange them in a given
order.
## Input
The first line contains... | 26,102 |
ABC String
Description:
You’re given a string consisting of the characters
A, B, and C. The string contains the same count of A, B, and C
characters.
A string is beautiful if
* Its length is divisible by $3$.
* The string can be split evenly into contiguous
substrings of size $3$, where each substri... | 26,103 |
ACKME Company Picnic
Description:
At ACKME Corporation, the annual company picnic has one very
important rule: nobody should have to spend their day off with
their boss. As the data science intern, your job is to help
draw up the invitation list for the best possible company
picnic. Luckily, ACKME has ... | 26,104 |
ACM Contest Scoring
Description:
Our new contest submission system keeps a chronological log
of all submissions made by each team during the contest. With
each entry, it records the number of minutes into the
competition at which the submission was received, the letter
that identifies the relevant cont... | 26,105 |
AI Jeopardy
Description:
Nowadays, more and more of Jeopardy’s viewers are
AIs themselves and as such the show is considering having
categories on topics that are more popular with this new
number-crunching viewer base. Focus group testing has revealed
that AIs are particularly fond of the “Binomial Co... | 26,106 |
AND Permutation
Description:
You are given a sequence of $n$ distinct nonnegative integers
$a_1, a_2, \ldots , a_
n$.
For the given sequence, it is guaranteed that for all
nonnegative numbers $x$,
if there is some $i$ such
that $a_ i \ \& \ x =
x$, then there is a $j$ such that $a_ j = x$. Her... | 26,107 |
ARMPIT Computations
Description:
The popular ARMPIT processor has a simple architecture that
is built around a single register that is $12$ bits long. The most significant
bit is viewed as being at the left end, and the least
significant bit at the right end. The contents of the register
are often repr... | 26,108 |
ASCII Addition
Description:
Nowadays, there are smartphone applications that instantly
translate text and even solve math problems if you just point
your phone’s camera at them. Your job is to implement a much
simpler functionality reminiscent of the past – add two
integers written down as ASCII art.
... | 26,109 |
ASCII Figure Rotation
Description:
Consider an ASCII art figure like the one on the left. If
the figure contains only spaces and the +, -
and | symbols, then its possible to produce rotated
versions of the figure using ASCII art. For example, the figure
on the right is a 90 degree clockwise rotation of... | 26,110 |
ASCII Kassi 2
Description:
Last year we looked back in time and made contestants draw
ASCII boxes as a challenge. This year we want to look at things
from a new perspective! Therefore the challenge this year is to
draw an ASCII box, but diagonally!
Last time the symbols +,
- and |
were used to dra... | 26,111 |
ASCII kassi
Description:
Today the High School Programming Contest of Iceland is
hosted on Kattis, which reviews the solutions from contestants
upon their submission. Most of the process has been automated,
but it wasn’t always this way.
Some years ago, judges walked from contestant to contestant,
to ... | 26,112 |
AVL++
Description:
An AVL tree, named after its two inventors, Adelson-Velskii
and Landis, is a binary search tree with an additional
constraint that keeps the tree balanced. The balance
factor of a node $x$,
denoted $\mathit{bf}(x)$,
is defined to be $H(x_ R) - H(x_
L)$, where $H(\, )$
is ... | 26,113 |
Aa
Description:
The letter Å is a relatively new invention in the Danish
alphabet, being introduced only in 1948. Before that, the
digraph Aa was used instead – this survives in town names like
Aabenraa and Aarhus.
When sorting Danish words, Å is treated as the last letter
of the alphabet. Interesting... | 26,114 |
Aaah!
Description:
Jon Marius shouted too much at the recent Justin Bieber
concert, and now needs to go to the doctor because of his sore
throat. The doctor’s instructions are to say “aaah”.
Unfortunately, the doctors sometimes need Jon Marius to say
“aaah” for a while, which Jon Marius has never been ... | 26,115 |
Ab Initio
Description:
“A journey of a thousand miles begins
with a single step.” –Lao Tzu.
When someone is studying competitive programming from the
beginning, he or she is said to be a student of competitive
programming ab initio. Students should
be given relatively easy problems to begin their jou... | 26,116 |
Abandoned Animal
Description:
You know that your sister will hold on to her beloved
Fluffynose whenever possible, so the only time she could’ve
lost it is when she grabbed an item on her shopping list. So,
all you have to do is figure out at what store she bought what,
and then you’ll reunite her with ... | 26,117 |
Above Average
Description:
## Input
The first line of standard input contains an integer
$1 \le C \le 50$, the
number of test cases. $C$
data sets follow. Each data set begins with an integer,
$N$, the number of people
in the class ($1 \le N \le
1000$). $N$
integers follow, separated by sp... | 26,118 |
Abridged Reading
Description:
Miss Othmar is a grade school teacher who uses a very
interesting textbook in her science class. All of the chapters
in the book have material that depends on at most one previous
chapter’s material, while several chapters are labeled
“Culminating Concept” chapters that ha... | 26,119 |
Absolutely Symmetric
Description:
SoCCat deemed a matrix $T$ of size $n \times n$ consisting of integers to
be absolutely symmetric if and only if
$|T_{i,j}| = |T_{j,i}|$
for all $1 \leq i, j \leq
n$. In other words, the absolute value of the entry in
the $i$-th row and
$j$-th column is equal t... | 26,120 |
Abstract Art
Description:
Arty has been an abstract artist since childhood, and his
works have taken on many forms. His latest (and most pricey)
creations are lovingly referred to as Abstract Art within the
abstract art community (they’re not the most original bunch
when it comes to loving nicknames). ... | 26,121 |
Abstract Painting
Description:
Gon is currently training to become a modern artist.
Everyday, Gon practices his painting skill on a rectangular
canvas, divided into $R \cdot
C$ unit squares, with $R$ rows and $C$ columns. Gon wants to paint all
the edges of all unit squares.
Contrary to popular belief, c... | 26,122 |
Absurdistan Roads II
Description:
The people of Absurdistan discovered how to build roads only
last year. After the discovery, each city decided to build its
own road, connecting the city with some other city. Each newly
built road can be used in both directions.
Absurdistan is full of absurd coincidences... | 26,123 |
Absurdistan Roads III
Description:
The people of Absurdistan discovered how to build roads only
last year. After the discovery, each city decided to build its
own road, connecting the city to some other city. Each newly
built road can be used in both directions.
You bought a tourist guide which has a map ... | 26,124 |
Acceptable Seating Arrangements
Description:
Charlie is managing a classroom. The seats in the classroom
are arranged in a grid with rows and columns. Each student has
a distinct height.
A configuration of students to seats is acceptable if the following conditions are
met:
* Each student is assigned to ... | 26,125 |
Access Denied
Description:
In a timing attack, we exploit that we can deduce a
computation path from the time it takes to do the computation.
In CTSS the password check was done using a simple string
matching algorithm, similar to this:
```
bool CheckPassword(string pwd1, string pwd2) {
if (pwd1.Lengt... | 26,126 |
Access Points
Description:
A well-known programming contest is considering a new way to
position its teams. For the contest all $n$ teams have to be assigned some
position $(x,y)$ in an
infinitely-large gym hall. To keep a good overview of the teams
the following strategy is chosen:
All teams have bee... | 26,127 |
Accounting
Description:
Erika the economist studies economic inequality. Her model
starts in a situation where everybody has the same amount of
money. After that, people’s wealth changes in various
complicated ways.
Erika needs to run a simulation a large number of times to
check if her model works. T... | 26,128 |
Ace Arbiter
Description:
Alice and Bob are playing a friendly game of ping pong. The
game consists of several rounds. At the end of each round,
exactly one player gets one point. The first player to 11
points wins. When that happens, the game immediately ends.
Alice start serving the first round, then ... | 26,129 |
Ada Loveslaces
Description:
A shoe has a lacing geometry: $N$, the number of eyelets (on a
side), $d$, the distance
between eyelets, $s$, the
separation between the columns of eyelets when the shoe is
laced, and $t$, the
thickness of an eyelet. In Figure 1 below, $N = 3$, with eyelets numbered from... | 26,130 |
Add 'Em Up!
Description:
Simon is a contestant on the new exciting game show, Add ’Em
Up! In this show, contestants are given a set of cards with
multi-digit numbers on them, and need to select two cards that
add up to a given sum. However, to make things more
interesting, the font that the cards are p... | 26,131 |
Add Two Numbers
Description:
In this problem, your program should read two whole numbers
(also called integers) from the input, and print out their
sum.
As a refresher, here are some ways to read two numbers from
standard input in a few different languages:
```
# Python 3
line = input()
a, b = line.split... | 26,132 |
Add or Multiply
Description:
Your younger sister is playing with a wooden math toy
consisting of number and operator blocks.
Each number block is printed with a single digit from
$1$ to $9$, and operator blocks are
double-sided; $+$ and
$\times $ are printed on
each side. She has just built a m... | 26,133 |
Adding Trouble
Description:
Your friend Bob is really bad at adding numbers, and he’d
like some help to make sure he’s doing it correctly! Can you
help Bob make sure he is adding correctly? Given 3 integers
$A$, $B$, $C$, make sure that $A + B = C$, and that Bob indeed added
$A$ and $B$ correctly.
## ... | 26,134 |
Adding Up the Votes
Description:
That last point is of particular interest, because computer
science researchers at KTH Royal Institute of Technology, the
host of the SCC 2021-2022 finals, have been studying how to
count votes as quickly as possible. Given a series of votes,
it’s easy to determine if a... | 26,135 |
Adding Words
Description:
Psychologists at Wassamatta University believe that humans
are able to more easily deal with words than with numbers. So
they have devised experiments to find out if this is true. In
an interesting twist, one of their experiments deals with using
words which represent numbers.... | 26,136 |
Adjoin the Networks
Description:
One day your boss explains to you that he has a bunch of
computer networks that are currently unreachable from each
other, and he asks you, the cable expert’s assistant, to adjoin
the networks to each other using new cables. Existing cables in
the network cannot be touc... | 26,137 |
Administrative Difficulties
Description:
It is difficult for a spy to do his job without a decent
car. The Bureau of Administrative Personnel for Cars (BAPC)
spy-car rental company has a large collection of cars that
spies can use and handles the resulting administration. Using
cars obviously costs mon... | 26,138 |
Adolescent Architecture
Description:
Little Peter is building a stack out of his toy blocks. He
is using two kinds of blocks – cubes and cylinders – and wants
to stack all of them into a single tower, where each block
other than the topmost block has a single block standing on it.
In order for the to... | 26,139 |
Ads
Description:
Web pages are littered with ads (advertisements) these days.
You wrote a simple program to detect images which are ads and
remove them.
Characters that are any of the following are allowed in
images:
* alphanumeric characters
* question mark ‘?’
* exclamation mark ‘!’
* comma ‘,’
* f... | 26,140 |
Advanced Causal Measurements
Description:
Causality is a very important concept in theoretical
physics. The basic elements in a discussion of causality are
events. An event $e$ is described by its time of
occurrence $t$, and its
location, $x$, and we
write $e = (t,x)$. For our
concerns, all eve... | 26,141 |
Adventure Begins
Description:
The game Pokenom Go has just been released. Pokenom trainers
can now travel the world, capture Pokenom in the wild and
battle each other! Bash — the Pokenom trainer — has decided to
drop out of his university to pursue his childhood dream of
becoming the best Pokenom train... | 26,142 |
Adventures in Moving -- Part IV
Description:
To help you move from Waterloo to the big city, you are
considering renting a moving truck. Gas prices being so high
these days, you want to know how much the gas for such a beast
will set you back.
The truck consumes a full litre of gas for each kilometre it
... | 26,143 |
Advertising ICPC
Description:
You’re making a flag to try to advertise ICPC! The flag
takes the form of a grid that is already filled with some
“C”, “I”, and
“P” letters. A flag is advertising
ICPC if there exists at least one $2 \times 2$ subgrid that looks
exactly like the following:
```
IC
P... | 26,144 |
Afjörmun
Description:
## Input
The first line will contain the integer $n$ ($1
\leq n \leq 10^4$), the number of sentences in the memed
text. The following $n$
lines will include one memed sentence each. Each sentence is at
most $300$ characters.
Note that a sentence always ends with a full stop and ... | 26,145 |
Aflmælingar
Description:
Hrolleifur has just gotten his hands on $300$ power generators and one
measuring device. He can set each power generator to a value
between $0\% $ and
$100\% $ and then turn
them all on to get a measurement of their power. The power
generators can only be set to integer per... | 26,146 |
Agamemnon's Odyssey
Description:
Agamemnon, the great king of Mycenae, was assembling his
troops in Aulis to sail to the shores of Troy, when he had a
vision of goddess Artemis. In this vision, Agamemnon found out
that he had accidentally slain a deer that was sacred to
Artemis, and now the goddess swo... | 26,147 |
Agar.IO
Description:
There are $n$ players
in an agar-io game. The $i^{th}$ player has an initial size of
$a_ i$. There are
$m$ pairs of players,
where the $i^{th}$ pair
represents that players $u_
i$ and $v_ i$
adjacent to each other. Note that unlike the 2d game, our
agar-io game is o... | 26,148 |
Air Conditioned Minions
Description:
You are the boss of ACM (Air Conditioned Minions), an
upstanding company with a single goal of world domination.
The company has $N$
minions. Each minion works evilly from early morning until
evening inside a super secret bunker in Helsinki. After much
deliberation... | 26,149 |
Air Rally
Description:
Baxter and Forthington are playing badminton the only
correct way—ten thousand feet in the air!
They intend to rally the shuttlecock back and forth while
cruising side-by-side at a constant speed. For simplicity,
assume that they cruise at one distance unit per second.
Forthington ... | 26,150 |
Airfare Grants
Description:
Congratulations! Your team has advanced to the next round of
the International Cupcake Production Competition (ICPC)! To
participate in the competition, you are going to fly to Cupcake
City from your hometown. The competition organizers have just
shared good news: generous s... | 26,151 |
Airline Hub
Description:
World Wide Flyer (WWF) has landing rights at several
airports throughout the world. They wish to place their central
hub at the airport that minimizes the maximum direct flying
distance from the hub to any other airport in the world.
## Input
Input file contains several sets of i... | 26,152 |
Airport Coffee
Description:
As it happens, Jonna just landed at Copenhagen Airport,
trying to make her connection to Heathrow Airport. Since her
flight from Helsinki was delayed, she must walk very quickly
from her arrival gate to the new departure gate. Normally,
Jonna walks at a speed of $a$ centimet... | 26,153 |
Airport Construction
Description:
The tropical island nation of Piconesia is famous for its
beautiful beaches, lush vegetation, cocoa and coffee
plantations, and wonderful weather all year round. This
paradise is being considered as a future location for the World
Finals of the ACM International Colleg... | 26,154 |
Airport Logistics
Description:
Many airports have moving conveyor belts in the corridors
between halls and terminals. Instead of walking on the floor,
passengers can choose to stand on a conveyor or, even better,
walk on a conveyor to get to the end of the corridor much
faster.
The brand new Delft Cit... | 26,155 |
Airports
Description:
An airline company offers flights out of $n$ airports. The flight time between
any given pair of airports is known, but may differ on
direction due to things like wind or geography. Upon landing at
a given airport, a plane must be inspected before it can be
flown again. This inspe... | 26,156 |
Akcija
Description:
There is a promotional offer in a bookstore “Take 3, pay for
the 2 more expensive ones”. So, each customer who picks
$3$ books gets the
cheapest one for free. Of course, the customer can take even
more books and, depending on the way the books are arranged
into groups of three, ... | 26,157 |
Akureyri
Description:
The year 2016 is an important year for Forritunarkeppni
Framhaldsskólanna. For the first time ever the contest will be
held in two locations! But now it is the year 3016 and the
contest is held all over the country, not just in Reykjavík or
Akureyri. The contestants no longer go t... | 26,158 |
Aladin
Description:
Aladin was walking down the path one day when he found the
strangest thing: $N$ empty
boxes right next to a weird alien machine. After a bit of
fumbling around he got the machine to do something. The machine
now accepts 4 integers $L$, $R$, $A$ and $B$. After that hitting the big re... | 26,159 |
Alchemy
Description:
Since the days of yore, alchemy has been studied and
practiced. The practice makes alchemists able to transmute
materials into other forms. Transmuting materials requires
drawing a transmutation circle on the ground. A little known
fact about transmutation circles is they can be dr... | 26,160 |
Alchemy
Description:
You just finished day one of your alchemy class! For your
alchemy homework, you have been given a string of lowercase
letters and wish to make it a palindrome. You’re only a
beginner at alchemy though, so your powers are limited. In a
single operation, you may choose exactly two ad... | 26,161 |
Alchemy 101
Description:
As a student at Hogwarts School of Witchcraft and Wizardry,
Harry must learn Alchemy — the study of magical
properties of elements and transmutation of substances. In
today’s Alchemy lab session, Harry is experimenting with
transmuting substances. In the magical world, there a... | 26,162 |
Alcohol
Description:
An organic chemical compound is a molecule consisting of
atoms that are pairwise connected by bonds.
Atom are of different types, such as oxygen, carbon, and
hydrogen. A hydroxy group is a hydrogen–oxygen bond. A
compound is an alcohol if it contains a hydroxy group
bound to a ... | 26,163 |
Alcohol-Free Alternative
Description:
In Sweden, across the Øresund Bridge, the alcohol laws are
considerably harsher than in Denmark. Aside from the higher age
limit, there are also a number of restrictions on how alcohol
may be served. One of these restrictions concerns alcohol-free
alternatives: a r... | 26,164 |
Aldur
Description:
## Input
The first line consists of a single integer $n$, the number of friends Tómas
has.
Then there are $n$ lines.
In the $i$-th line there
is a single integer $a_i$,
the age of his $i$-th
friend.
## Output
Print a single integer, the age of Tómas’ youngest
friend.
... | 26,165 |
Aldursröðun
Description:
## Input
The first line of the input contains an integer $3 \leq n \leq 8$. The next line of
the input contains $n$
integers, $1 \leq c_ i \leq
10^9$. The integer $c_
i$ describes the age of your $i$-th child.
## Output
The first line of the output should contain the ages of... | 26,166 |
Alea Iacta Est
Description:
You play a game with multiple fair six-sided dice. Each
die’s face displays a single symbol. The objective of the game
is to roll the dice and create a valid word from the symbols on
top of each die. If you cannot form a word, you may reroll the
dice for another attempt.
Su... | 26,167 |
Alea iacta est
Description:
Isaac B. Manfred always dreamed about being a terribly rich
man. Recently, he started to study dice games. He found several
of them similar to a trademarked game called Yahtzee! The rules
sometimes vary but basic principles are the same. To give you
an idea, we will describe... | 26,168 |
Alehouse
Description:
Making friends can seem impossible, but going to the
alehouse makes it easy — it is actually the only way to make
friendships. Luckily, the alehouse is extremely good at its
task: if two people are inside simultaneously, they instantly
become friends. People even become friends if... | 26,169 |
Alex and Barb
Description:
Alex and Barb are waiting for their two cousins to visit for
dinner. Since their cousins tend to get involved in all sorts
of shenanigans, Alex and Barb decide to pass the time with a
little card game.
The game is as follows: there is a stack of $k$ cards on the table. Alex and ... | 26,170 |
Alice in the Digital World
Description:
After returning from Wonderland, Alice needs to improve her
scientific skills in the current digital world. Alice decides
to participate the ACM - ICPC Asia Nha Trang Regional Contest
2016 to evaluate her actual performance. Her favorite problem
in the contest is... | 26,171 |
Alien Attack 2
Description:
In order to keep a low profile in the future, the Galactic
Committee for Person Captures (GCPC) has established rules for
abductions. Besides a lot of boring paperwork, the aliens have
to prepare the abduction carefully. While they can make
multiple trips (in fact, alien tra... | 26,172 |
Alien Codebreaking
Description:
You’ve intercepted encrypted communications between Martian
diplomats. Since Martian diplomats are often spies, you decide
to decrypt the messages. While the Martians have skilled rocket
tech, they lag behind in number theory considerably, which
compromises their encrypt... | 26,173 |
Alien Integers
Description:
Exploratory robots are essential to expanding our
understanding of the moon, Mars, and other celestial bodies.
When there are two or more robots in the same vicinity, they
need to be marked by humanly readable integers for purposes of
visual tracking. To reduce the possibili... | 26,174 |
Alien Math
Description:
Humans are exploring the stars, and we have encountered
aliens! In an exchange of scientific knowledge, we’ve learned
that not only do they use entirely different symbols to do
math, they don’t even use base ten! It would be nice to have a
program to convert the alien numbers to... | 26,175 |
Alien Microwave
Description:
A standard microwave is operated by entering the cooking
time as a string in the form of hhmmss,
where hh, mm, and
ss are two-digit integers less than
$24$, $60$, and $60$, respectively. Leading zeros in
the string hhmmss are omitted. For example,
the cooking time o... | 26,176 |
Alien Numbers
Description:
The decimal numeral system is composed of ten digits, which
we represent as "0123456789" (the digits in a system are
written from lowest to highest). Imagine you have discovered an
alien numeral system composed of some number of digits, which
may or may not be the same as tho... | 26,177 |
Aligning Bottles
Description:
It was a great evening. However, your friends helped
themselves to bottles from the crate of Harboe pilsner without
any attention to aesthetics, leaving an unorderly mess of holes
and disconnected clusters. Before you go to bed, you want to
restore some semblance of order.... | 26,178 |
All Colourings
Description:
Given an undirected graph $G =
(V,E)$, a proper colouring of $G$ with $K$ colours is an assignment of values
from $1$ through
$K$ to each vertex so that
each edge receives a different value/colour. That is, a proper
$K$-colouring is a mapping
$\sigma : V \rightarrow ... | 26,179 |
All Different Directions
Description:
If you walk through a big city and try to find your way
around, you might try asking people for directions. However,
asking $n$ people for
directions might result in $n$ different sets of directions. But
you believe in the law of averages: if you consider everyone’... | 26,180 |
All Fax No Printer
Description:
You have $k$ fax
machines. Throughout the day, $n$ jobs arrive in order, each taking
a certain amount of time. Each job gets run on a machine if one
is available, else must be canceled if none are available at
that time. Being a regretful person, you want to know how wel... | 26,181 |
All Friends
Description:
Sociologists are interested in the phenomenon of
“friendship”. To study this property, they analyze various
groups of people. For each two persons in such a group they
determine whether they are friends (it is assumed that this
relation is symmetric). The sociologists are mostl... | 26,182 |
All Just A Dream
Description:
When the All Just A Dream trick is taken too far and gets
used too often, it can get difficult to keep track of what has
actually happened. This is where you enter the picture. You
will be given a list of events, dreams, and scenarios. Each
scenario specifies some events t... | 26,183 |
All Kill
Description:
You just finished participating in a programming contest
with your friend. Unfortunately, you were unable to All Kill
the contest (i.e., solve all of the problems), but you are now
wondering if there might be some strategy that would have
solved all of the problems.
Solving a pro... | 26,184 |
All Modulo Pythagorean
Description:
You are given a value $n$ and should investigate Pythagorean
triples modulo $n$. This
means we are considering triples $(a, b, c)$ where $0 < a, b, c < n$ that satisfy
$a^2 + b^2 = c^2 \pmod{n}$
and $a \leq b$.
For example in the first sample the solutions are
$... | 26,185 |
All Pair Sums
Description:
You are given two multisets of integers, $A$ and $B$. Then you are given queries
containing a number $x$
and are asked to find the number of ways to write $x$ as a sum of two numbers
$a \in A$ and $b \in B$.
## Input
The first line of input contains two positive integers
$n... | 26,186 |
All Pairs Shortest Path
Description:
## Input
The input consists of several test cases. Each test case
starts with a line with three non-negative integers,
$1 \le n \le 150$,
$0 \le m \le 5000$ and
$1 \le q \le 1000$,
separated by single single spaces, where $n$ is the numbers of nodes in the
... | 26,187 |
All Square Sums
Description:
You are given a non-negative integer $n$ and should print all ways to write
$n$ as the sum of two
integer squares.
## Input
The first and only line of input contain a non-negative
integer $n \leq
10^{18}$.
## Output
First print the number of ways $n$ can be written as t... | 26,188 |
All about that base
Description:
The base (or radix) of a positional
numeral system is the number of symbols that can be used to
represent a number in that system. The base $10$ system (also known as decimal)
uses $10$ distinct
symbols: $0, 1, \ldots ,
9$. For example, we interpret the number $7234... | 26,189 |
All in the Family
Description:
The scientists working at the Family Genetics Institute are
tracing the spread of a hereditary disease through family
trees. They have started by listing the family members that
have the disease, and the parent who passed the disease on to
each child (we will assume that ... | 26,190 |
All is Well
Description:
“All is well!” cries the watchman as he makes his way
through the city. Each night he patrols the city, following a
route that ensures that the people of the town hear him. You
feel safe and secure each night as you start to fall asleep and
hear the familiar call from the stree... | 26,191 |
Allergen Testing
Description:
You are in a chemistry class, and you are working with some
compounds, exactly one of which you are allergic to. You have a
fixed number of days to figure out which compound it is. You
set up a number of sites on your arm for testing. On each day,
you do the following exac... | 26,192 |
Allergy Test
Description:
A test for allergy is conducted over the course of several
days, and consists of exposing you to different substances (so
called allergens). The goal is to decide exactly which of the
allergens you are allergic to. Each allergen has a live
duration $D$ measured in
whole da... | 26,193 |
Alloys
Description:
Pelle is building a new advanced underground drill. He wants
to build the drill out of a new titanium-aluminium-magnesium
alloy. Such an alloy can be mixed in many ways. If an alloy is
made with the ratios $x, y,
z$ ($x + y + z =
1$) of titanium, aluminium and magnesium, the all... | 26,194 |
Almennir Borgarar
Description:
Benni, an ardent competitive programmer (and hamburger
enthusiast), is waiting in line with $m$ other contestants in front of him.
How long will Benni have to wait if the chefs utilize the
grills optimally?
## Input
The first line of the input contains two integers
$n$ ... | 26,195 |
Almost Balanced
Description:
Consider making a string $s$ of $\textbf{even}$ length $n$ consisting of $0$ and $1$, where $s$ must satisfy $m$ conditions. The $i^{th}$ condition is represented by
integers $T_ i, L_ i, R_ i (1
\leq L_ i<R_ i \leq n), V_ i (0 \leq V_ i)$. Note
that $L_ i \not\equiv R_ i \text... | 26,196 |
Almost Perfect
Description:
A positive integer $p$
is called a perfect number if all the
proper divisors of $p$ sum
to $p$ exactly. Integer
$d$ is a proper divisor of
$p$ if $1 \le d \le p-1$ and $p$ is evenly divisible by
$d$. For example, the
number $28$ is a perfect
number, since its... | 26,197 |
Almost Pythagorean
Description:
You are given a non-negative integer $n$ and should print the number of
integer triples $(a, b,
c)$ that satisfy $0 \leq a
\leq b \leq c \leq n$ and $a^2 + b^2 = c^2 + c$.
## Input
The first and only line of input contains a non-negative
integer $n \leq
10^{5}$.
#... | 26,198 |
Almost Sorted
Description:
You are given an array of of $n$ integers $a_1, a_2, \ldots , a_ n$. An array is
almost sorted if it is possible to reverse a continuous
subarray to obtain an ascending sorted array. In other words,
an array is almost sorted if there exists $1\leq i\leq j\leq n$ such that
$a_... | 26,199 |
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