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__source__ = 'https://leetcode.com/problems/valid-parenthesis-string/description/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 678. Valid Parenthesis String
#
# Given a string containing only three types of characters: '(', ')' and '*',
# write a function to check whether this string is valid.
# We define the... |
# coding=utf-8
__source__ = 'https://leetcode.com/problems/perfect-number/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 507. Perfect Number
#
# We define the Perfect Number is a positive integer t
# hat is equal to the sum of all its positive divisors except itself.
# Now, given an integer n, write a function... |
__source__ = 'https://leetcode.com/problems/prime-palindrome/'
# Time: O(N)
# Space: O(1)
#
# Description: Leetcode # 866. Prime Palindrome
#
# Find the smallest prime palindrome greater than or equal to N.
#
# Recall that a number is prime if it's only divisors are 1 and itself, and it is greater than 1.
#
# For exam... |
__source__ = 'https://leetcode.com/problems/global-and-local-inversions/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 775. Global and Local Inversions
#
# We have some permutation A of [0, 1, ..., N - 1], where N is the length of A.
#
# The number of (global) inversions is the number of i < j with 0 <= i < j ... |
__source__ = 'https://leetcode.com/problems/remove-duplicates-from-sorted-list/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/remove-duplicates-from-sorted-list.py
# Time: O(n)
# Space: O(1)
# LinkedList
#
# Description: Leetcode # 83. Remove Duplicates from Sorted List
#
# Given a sorted linked list, del... |
__source__ = 'https://leetcode.com/problems/least-operators-to-express-number/solution/'
# Time: (Logx target)
# Space: (Log target)
#
# Description: Leetcode # 964. Least Operators to Express Number
#
# Given a single positive integer x,
# we will write an expression of the form x (op1) x (op2) x (op3) x ...
# where ... |
__source__ = 'https://leetcode.com/problems/wiggle-sort-ii/description/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/wiggle-sort-ii.py
# Time: O(nlogn)
# Space: O(n)
#
# Description: Leetcode # 324. Wiggle Sort II
#
# Given an unsorted array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3... |
__source__ = 'https://leetcode.com/problems/surface-area-of-3d-shapes/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 892. Surface Area of 3D Shapes
#
# On a N * N grid, we place some 1 * 1 * 1 cubes.
#
# Each value v = grid[i][j] represents a tower of v cubes placed on top of grid cell (i, j).
#
# Return the t... |
__source__ = 'https://leetcode.com/problems/exam-room/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 855. Exam Room
#
# In an exam room, there are N seats in a single row, numbered 0, 1, 2, ..., N-1.
#
# When a student enters the room,
# they must sit in the seat that maximizes the distance to the closest pe... |
__source__ = 'https://leetcode.com/problems/asteroid-collision/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 735. Asteroid Collision
#
# We are given an array asteroids of integers representing asteroids in a row.
#
# For each asteroid, the absolute value represents its size,
# and the sign represents its d... |
__source__ = 'https://leetcode.com/problems/search-a-2d-matrix-ii/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/search-a-2d-matrix-ii.py
# Time: O(m + n)
# Space: O(1)
#
# Description: Leetcode # 240. Search a 2D Matrix II
#
# Write an efficient algorithm that searches for a value in an m x n matrix.
# T... |
__source__ = 'https://leetcode.com/problems/linked-list-cycle/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/linked-list-cycle.py
# Time: O(n)
# Space: O(1)
# Two Pointer
#
# Description: Leetcode # 141. Linked List Cycle
#
# Given a linked list, determine if it has a cycle in it.
#
# Follow up:
# Can you... |
__source__ = 'https://leetcode.com/problems/number-of-digit-one/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/number-of-digit-one.py
# Time: O(logn)
# Space: O(1)
#
# Description: Leetcode # 233. Number of Digit One
#
# Given an integer n, count the total number of digit 1 appearing
# in all non-negative... |
# coding=utf-8
__source__ = 'https://leetcode.com/problems/implement-rand10-using-rand7/'
# Time: O(1) average, but O(∞) worst case.
# Space: O(1)
#
# Description: Leetcode # 470. Implement Rand10() Using Rand7()
#
# Given a function rand7 which generates a uniform random integer in the range 1 to 7,
# write a functio... |
__source__ = 'https://leetcode.com/problems/mirror-reflection/'
# Time: O(logP)
# Space: O(1)
#
# Description: Leetcode # 858. Mirror Reflection
#
# There is a special square room with mirrors on each of the four walls.
# Except for the southwest corner, there are receptors on each of the remaining corners, numbered 0... |
__source__ = 'https://leetcode.com/problems/find-pivot-index/description/'
# Time: O(N)
# Space: O(1)
#
# Description: Leetcode # 724. Find Pivot Index
#
# Given an array of integers nums, write a method that returns the "pivot" index of this array.
#
# We define the pivot index as the index
# where the sum of the num... |
__source__ = 'https://leetcode.com/problems/minimum-area-rectangle-ii/'
# Time: O(N^3)
# Space: O(N)
#
# Description: Leetcode # 963. Minimum Area Rectangle II
#
# Given a set of points in the xy-plane, determine the minimum area of any rectangle formed from these points,
# with sides not necessarily parallel to the x... |
__author__ = 'July'
# http://agiliq.com/blog/2013/09/understanding-threads-in-python/
#define a global variable
from threading import Thread
from threading import Lock
some_var = 0
lock = Lock()
class IncrementThreadRace(Thread):
def run(self):
#we want to read a global variable
#and then increme... |
__source__ = 'https://leetcode.com/problems/minimum-index-sum-of-two-lists/'
# Time: O( n + m)
# Space: O(n)
#
# Description: 599. Minimum Index Sum of Two Lists
#
# Suppose Andy and Doris want to choose a restaurant for dinner,
# and they both have a list of favorite restaurants represented by strings.
#
# You need t... |
__source__ = 'https://leetcode.com/problems/prefix-and-suffix-search/'
# Time: O(NK^2 + QK) where N is the number of words,
# K is the maximum length of a word, and Q is the number of queries.
# Space: O(NK^2), the size of the trie.
#
# Description: Leetcode # 745. Prefix and Suffix Search
#
# Given many words, words[... |
__source__ = 'https://leetcode.com/problems/set-mismatch/'
# Time: O(n)
# Space: O(1)
#
# Description: Leetcode # 645. Set Mismatch
#
# The set S originally contains numbers from 1 to n. But unfortunately, due to the data error,
# one of the numbers in the set got duplicated to another number in the set,
# which resul... |
__source__ = 'https://leetcode.com/problems/happy-number/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/happy-number.py
# Time: O(k), where k is the steps to be happy number
# Space: O(k)
#
# Description: Leetcode # 202. Happy Number
#
# Write an algorithm to determine if a number is "happy".
#
# A happy ... |
__source__ = 'https://leetcode.com/problems/goat-latin/'
# Time: O(N^2)
# Space: O(N^2)
#
# Description: Leetcode # 824. Goat Latin
#
# A sentence S is given, composed of words separated by spaces.
# Each word consists of lowercase and uppercase letters only.
#
# We would like to convert the sentence to "Goat Latin" (... |
__source__ = 'https://leetcode.com/problems/increasing-triplet-subsequence/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/increasing-triplet-subsequence.py
# Time: O(n)
# Space: O(1)
#
# Description: Leetcode # 334. Increasing Triplet Subsequence
#
# Given an unsorted array return whether an increasing
# ... |
__source__ = 'https://leetcode.com/problems/next-greater-element-ii/'
# Time: O(n) stack + 2 pass
# Space: O(n)
#
# Description: 503. Next Greater Element II
#
# Given a circular array (the next element of the last element is the first element of the array),
# print the Next Greater Number for every element. The Next ... |
# coding=utf-8
__source__ = 'https://leetcode.com/problems/longest-word-in-dictionary/'
# Time: O(m) sum of the length of words[i]
# Space: O(m) the space used by our trie
#
# Description: Leetcode # 720. Longest Word in Dictionary
#
# Given a list of strings words representing an English Dictionary,
# find the longes... |
__source__ = 'https://leetcode.com/problems/delete-columns-to-make-sorted/'
# Time: O(N)
# Space: O(1)
#
# Description: Leetcode # 944. Delete Columns to Make Sorted
#
# We are given an array A of N lowercase letter strings, all of the same length.
#
# Now, we may choose any set of deletion indices, and for each strin... |
__source__ = 'https://leetcode.com/problems/bitwise-and-of-numbers-range/description/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/bitwise-and-of-numbers-range.py
# Time: O(1)
# Space: O(1)
#
# Description: Leetcode # 201. Bitwise AND of Numbers Range
#
# Given a range [m, n] where 0 <= m <= n <= 2147483... |
__source__ = 'https://leetcode.com/problems/falling-squares/description/'
# Time: O(N*N^(1/2))
# Space: O(N)
# Segment Tree
#
# Description: Leetcode # 699. Falling Squares
#
# On an infinite number line (x-axis), we drop given squares in the order they are given.
#
# The i-th square dropped (positions[i] = (left, sid... |
# coding=utf-8
__source__ = 'https://leetcode.com/problems/race-car/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 818. Race Car
#
# Your car starts at position 0 and speed +1 on an infinite number line. (Your car can go into negative positions.)
#
# Your car drives automatically according to a sequence of in... |
__source__ = 'https://leetcode.com/problems/valid-perfect-square/description/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/valid-perfect-square.py
# Time: O(logn)
# Space: O(1)
#
# Description: Leetcode # 367. Valid Perfect Square
#
# Given a positive integer num, write a function
# which returns True if... |
__source__ = 'https://leetcode.com/problems/trapping-rain-water-ii/#/description'
# https://github.com/kamyu104/LeetCode/blob/master/Python/trapping-rain-water-ii.py
# Time: O(m * n * log(m + n)) ~ O(m * n * log(m * n))
# Space: O(m * n)
#
# Description: Leetcode # 407. Trapping Rain Water II
#
# Given an m x n matrix... |
__source__ = 'https://leetcode.com/problems/minimum-height-trees/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/minimum-height-trees.py
# Time: O(n)
# Space: O(n)
#
# Description: Leetcode # 310. Minimum Height Trees
#
# For a undirected graph with tree characteristics, we can
# choose any node as the roo... |
__source__ = 'https://leetcode.com/problems/longest-word-in-dictionary-through-deleting/'
# Time: O(nlogn + n*x), Sorting takes O(nlogn) and isSubsequence takes O(x)
# Space: O(logn) Sorting takes O(logn) space in average case.
#
# Description: 524. Longest Word in Dictionary through Deleting
#
# Given a string and a ... |
__source__ = 'https://leetcode.com/problems/subarray-product-less-than-k/'
# Time: O(N)
# Space: O(1)
#
# Description: Leetcode # 713. Subarray Product Less Than K
#
# Your are given an array of positive integers nums.
#
# Count and print the number of (contiguous) subarrays
# where the product of all the elements in ... |
__source__ = 'https://leetcode.com/problems/range-sum-query-immutable/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/range-sum-query-immutable.py
# Time: ctor: O(n),
# update: O(logn),
# query: O(logn)
# Space: O(n)
#
# Description: Leetcode # 303. Range Sum Query - Immutable
#
# Given an... |
__source__ = 'https://leetcode.com/problems/binary-tree-maximum-path-sum/#/description'
# https://github.com/kamyu104/LeetCode/blob/master/Python/binary-tree-maximum-path-sum.py
# Time: O(n)
# Space: O(h), h is height of binary tree
# Divide and Conquer
#
# Description: Leetcode # 124. Binary Tree Maximum Path Sum
#
#... |
__source__ = 'https://leetcode.com/problems/number-of-music-playlists/'
# Time: O()
# Space: O()
# DP
#
# Description: Leetcode # 920. Number of Music Playlists
#
# # our music player contains N different songs
# and she wants to listen to L (not necessarily different) songs during your trip.
# You create a playlist s... |
__source__ = 'https://leetcode.com/problems/minimum-number-of-arrows-to-burst-balloons/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/minimum-number-of-arrows-to-burst-balloons.py
# Time: O(nlogn)
# Space: O(1)
#
# Description: 452. Minimum Number of Arrows to Burst Balloons
#
# There are a number of sphe... |
__source__ = 'https://leetcode.com/problems/unique-paths-iii/'
# Time: O(4^(R*C)), where R,C are the number of rows and columns in the grid.
# Space: O(R*C)
#
# Description: Leetcode # 980. Unique Paths III
#
# On a 2-dimensional grid, there are 4 types of squares:
#
# 1 represents the starting square. There is exact... |
__source__ = 'https://leetcode.com/problems/frog-jump/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/frog-jump.py
# Time: O(n) ~ O(n^2)
# Space: O(n)
#
# Description: Leetcode # 403. Frog Jump
#
# A frog is crossing a river. The river is divided into x units and
# at each unit there may or may not exist a... |
__source__ = 'https://leetcode.com/problems/4-keys-keyboard/description/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 651. 4 Keys Keyboard
#
# Imagine you have a special keyboard with the following keys:
#
# Key 1: (A): Prints one 'A' on screen.
#
# Key 2: (Ctrl-A): Select the whole screen.
#
# Key 3: (Ctrl-C... |
__source__ = 'https://leetcode.com/problems/split-array-into-consecutive-subsequences/'
# Time: O(n)
# Space: O(n)
#
# Description: Leetcode # 659. Split Array into Consecutive Subsequences
#
# You are given an integer array sorted in ascending order (may contain duplicates),
# you need to split them into several subs... |
__source__ = 'https://leetcode.com/problems/evaluate-reverse-polish-notation/description/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/evaluate-reverse-polish-notation.py
# Time: O(n)
# Space: O(n)
# Stack
#
# Description: Leetcode # 150. Evaluate Reverse Polish Notation
#
# http://en.wikipedia.org/wiki/... |
__source__ = 'https://leetcode.com/problems/maximum-length-of-pair-chain/'
# Time: O(nlogn)
# Space: O(1)
#
# Description: Leetcode # 646. Maximum Length of Pair Chain
#
# You are given n pairs of numbers. In every pair, the first number is always smaller than the second number.
#
# Now, we define a pair (c, d) can fo... |
__source__ = 'https://leetcode.com/problems/remove-comments/'
# Time: O(N) N: length of source code
# Space: O(N)
#
# Description: Leetcode # 722. Remove Comments
#
# Given a C++ program, remove comments from it.
# The program source is an array where source[i] is the i-th line of the source code.
# This represents th... |
__source__ = 'https://leetcode.com/problems/squares-of-a-sorted-array/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 977. Squares of a Sorted Array
#
# Given an array of integers A sorted in non-decreasing order,
# return an array of the squares of each number, also in sorted non-decreasing order.
#
# Example ... |
__source__ = 'https://leetcode.com/problems/largest-divisible-subset/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/largest-divisible-subset.py
# Time: O(n^2)
# Space: O(n)
#
# Description: Leetcode # 368. Largest Divisible Subset
#
# Given a set of distinct positive integers,
# find the largest subset su... |
__source__ = 'https://leetcode.com/problems/partition-array-into-disjoint-intervals/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 915. Partition Array into Disjoint Intervals
#
# Given an array A, partition it into two (contiguous) subarrays left and right so that:
#
# Every element in left is less than or ... |
__source__ = 'https://leetcode.com/problems/detect-capital/'
# Time: O()
# Space: O()
#
# Description: 520. Detect Capital
#
# Given a word, you need to judge whether the usage of capitals in it is right or not.
#
# We define the usage of capitals in a word to be right when one of the following cases holds:
#
# All le... |
# coding=utf-8
__source__ = 'https://leetcode.com/problems/similar-string-groups/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 839. Similar String Groups
#
# Two strings X and Y are similar if we can swap two letters (in different positions) of X,
# so that it equals Y.
#
# For example, "tars" and "rats" are ... |
__source__ = 'https://leetcode.com/problems/teemo-attacking/#/description'
# Time: O(n)
# Space: O(1)
#
# Description: 495. Teemo Attacking
#
# In LLP world, there is a hero called Teemo and his attacking can make his enemy Ashe be in poisoned condition.
# Now, given the Teemo's attacking ascending time series towards... |
__source__ = 'https://leetcode.com/problems/nim-game/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/nim-game.py
# Time: O(1)
# Space: O(1)
#
# Description: # 292. Nim Game
#
# You are playing the following Nim Game with your friend:
# There is a heap of stones on the table, each time one of
# you take tur... |
__source__ = 'https://leetcode.com/problems/student-attendance-record-ii/'
# Time: O(n)
# Space: O(n)
#
# Description: 552. Student Attendance Record II
#
# Given a positive integer n, return the number of all possible attendance records with length n,
# which will be regarded as rewardable. The answer may be very lar... |
__source__ = 'https://leetcode.com/problems/find-smallest-letter-greater-than-target/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 744. Find Smallest Letter Greater Than Target
#
# Given a list of sorted characters letters containing only lowercase letters,
# and given a target letter target,
# find the small... |
__source__ = 'https://leetcode.com/problems/string-without-aaa-or-bbb/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 984. String Without AAA or BBB
#
# Given two integers A and B, return any string S such that:
#
# S has length A + B and contains exactly A 'a' letters, and exactly B 'b' letters;
# The substrin... |
__source__ = 'https://leetcode.com/problems/expression-add-operators/#/description'
# https://github.com/kamyu104/LeetCode/blob/master/Python/expression-add-operators.py
# Time: O(4^n)
# Space: O(n)
#
# Description: Leetcode # 282. Expression Add Operators
#
# Given a string that contains only digits 0-9
# and a targe... |
__source__ = 'https://leetcode.com/problems/palindrome-permutation/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/palindrome-permutation.py
# Time: O(n)
# Space: O(1)
#
# Description: Leetcode # 266. Palindrome Permutation
#
# Given a string, determine if a permutation of the string could form a palindrom... |
__author__ = 'July'
# write a method to compute all permutation of a string
# write a methof to compute all combinatino of a string
import re
class Solution:
# no ordering
def getPermutation(self, str):
result = self.getPermutationRecu(str)
for i in xrange(len(result)):
result[i] = re... |
__source__ = 'https://leetcode.com/problems/trim-a-binary-search-tree/description/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 669. Trim a Binary Search Tree
#
# Given a binary search tree and the lowest and highest boundaries as L and R,
# trim the tree so that all its elements lies in [L, R] (R >= L).
# ... |
__source__ = 'https://leetcode.com/problems/judge-route-circle/description/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 657. Judge Route Circle
#
# Initially, there is a Robot at position (0, 0). Given a sequence of its moves,
# judge if this robot makes a circle, which means it moves back to the original pl... |
__source__ = 'https://leetcode.com/problems/triangle/description/'
# Time: O(m * n)
# Space: O(n)
# DP
#
# Description: Leetcode # 120. Triangle
#
# Given a triangle, find the minimum path sum from top to bottom.
# Each step you may move to adjacent numbers on the row below.
#
# For example, given the following triang... |
__source__ = 'https://leetcode.com/problems/search-a-2d-matrix/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/search-a-2d-matrix.py
# Time: O(logm + logn)
# Space: O(1)
# Binary Search
#
# Description: Leetcode # 74. Search a 2D Matrix
#
# Write an efficient algorithm that searches for a value in an m x n... |
__source__ = 'https://leetcode.com/problems/longest-palindrome/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/longest-palindrome.py
# Time: O(n)
# Space: O(1)
#
# Description: Leetcode # 409. Longest Palindrome
#
# Given a string which consists of lowercase or uppercase letters,
# find the length of the l... |
__source__ = 'https://leetcode.com/problems/reshape-the-matrix/'
# Time: O(n * m )
# Space: O(n * m)
#
# Description: Leetcode # 566. Reshape the Matrix
#
# In MATLAB, there is a very useful function called 'reshape',
# which can reshape a matrix into a new one with different size but keep its original data.
#
# You'r... |
__source__ = 'https://leetcode.com/problems/remove-duplicates-from-sorted-list-ii/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/remove-duplicates-from-sorted-list-ii.py
# Time: O(n)
# Space: O(1)
# LinkedList
#
# Description: Leetcode # 82. Remove Duplicates from Sorted List II
#
# Given a sorted linked ... |
__source__ = 'https://leetcode.com/problems/minimum-increment-to-make-array-unique/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 945. Minimum Increment to Make Array Unique
#
# Given an array of integers A, a move consists of choosing any A[i], and incrementing it by 1.
#
# Return the least number of moves to... |
__source__ = 'https://leetcode.com/problems/house-robber/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/house-robber.py
# Time: O(n)
# Space: O(1)
#
# Description: Leetcode # 198. House Robber
#
# You are a professional robber planning to rob houses along a street.
# Each house has a certain amount of mon... |
__source__ = 'https://leetcode.com/problems/minimum-moves-to-equal-array-elements/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/minimum-moves-to-equal-array-elements-ii.py
# Time: O(nlogn)
# Space: O(1)
#
# Description: 453. Minimum Moves to Equal Array Elements
#
# Given a non-empty integer array of siz... |
__source__ = 'https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/binary-tree-zigzag-level-order-traversal.py
# Time: O(n)
# Space: O(n)
# BFS
#
# Description: Leetcode # 103. Binary Tree Zigzag Level Order Traversal
#
# Given a binary tree... |
__source__ = 'https://leetcode.com/problems/rearrange-string-k-distance-apart/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/rearrange-string-k-distance-apart.py
# Time: O(n)
# Space: O(n)
#
# Description: Leetcode # 358. Rearrange String k Distance Apart
#
# Given a non-empty string str and an integer k,... |
__source__ = 'https://leetcode.com/problems/spiral-matrix-ii/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/spiral-matrix-ii.py
# Time: O(n^2)
# Space: O(1)
#
# Description: Leetcode # 59. Spiral Matrix II
#
# Given an integer n, generate a square matrix filled with elements from 1 to n^2 in spiral order... |
__source__ = 'https://leetcode.com/problems/delete-and-earn/'
# Time: O(N + W)
# Space: O(W)
#
# Description: Leetcode # 740. Delete and Earn
#
# Given an array nums of integers, you can perform operations on the array.
#
# In each operation, you pick any nums[i] and delete it to earn nums[i] points.
# After, you must... |
__source__ = 'https://leetcode.com/problems/boundary-of-binary-tree/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 545. Boundary of Binary Tree
#
# Given a binary tree, return the values of its boundary in anti-clockwise direction starting from root.
# Boundary includes left boundary, leaves, and right bound... |
__source__ = 'https://leetcode.com/problems/linked-list-cycle-ii/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/linked-list-cycle-ii.py
# Time: O(n)
# Space: O(1)
# Two Pointer
#
# Description: Leetcode # 142. Linked List Cycle II
#
# Given a linked list, return the node where the cycle begins. If there i... |
__source__ = 'https://leetcode.com/problems/convert-sorted-list-to-binary-search-tree/description/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/convert-sorted-list-to-binary-search-tree.py
# Time: O(n)
# Space: O(logn)
# Divide and Conquer
#
# Description: Leetcode # 109. Convert Sorted List to Binary Se... |
__source__ = 'https://leetcode.com/problems/number-of-matching-subsequences/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 792. Number of Matching Subsequences
#
# Given string S and a dictionary of words words,
# find the number of words[i] that is a subsequence of S.
#
# Example :
# Input:
# S = "abcde"
# wo... |
__source__ = 'https://leetcode.com/problems/find-anagram-mappings/description/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 760. Find Anagram Mappings
#
# Given two lists A and B, and B is an anagram of A.
# B is an anagram of A means B is made by randomizing the order of the elements in A.
#
# We want to f... |
__source__ = 'https://leetcode.com/problems/backspace-string-compare/description/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 844. Backspace String Compare
#
# Given two strings S and T, return if they are equal when both are typed into empty text editors.
# means a backspace character.
#
# Example 1:
#
#... |
# coding=utf-8
__source__ = 'https://leetcode.com/problems/rotate-function/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/rotate-function.py
# Time: O(n)
# Space: O(1)
#
# Description: Leetcode # 396. Rotate Function
#
# Given an array of integers A and let n to be its length.
#
# Assume Bk to be an array... |
__source__ = 'https://leetcode.com/problems/shortest-path-visiting-all-nodes/'
# Time: O(2^N * N)
# Space: O(2^N * N)
#
# Description: Leetcode # 847. Shortest Path Visiting All Nodes
#
# An undirected, connected graph of N nodes (labeled 0, 1, 2, ..., N-1) is given as graph.
#
# graph.length = N, and j != i is in the... |
__source__ = 'https://leetcode.com/problems/sequence-reconstruction/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/sequence-reconstruction.py
# Time: O(n * s), n is the size of org, s is the size of seqs
# Space: O(n)
#
# Description: 444. Sequence Reconstruction
#
# Check whether the original sequence or... |
__source__ = 'https://leetcode.com/problems/keys-and-rooms/'
# Time: O(N + E), where NN is the number of rooms, and EE is the total number of keys.
# Space: O(N)
#
# Description: Leetcode # 841. Keys and Rooms
#
# There are N rooms and you start in room 0.
# Each room has a distinct number in 0, 1, 2, ..., N-1,
# and ... |
__source__ = 'https://leetcode.com/problems/fraction-to-recurring-decimal/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/fraction-to-recurring-decimal.py
# Time: O(logn), where log n is the length of result strings
# Space: O(1)
# MATH
#
# Description: Leetcode # 166. Fraction to Recurring Decimal
#
# Giv... |
__source__ = 'https://leetcode.com/problems/walking-robot-simulation/'
# Time: O()
# Space: O()
#
# Description: Leetcode # 874. Walking Robot Simulation
#
# A robot on an infinite grid starts at point (0, 0) and faces north.
# The robot can receive one of three possible types of commands:
#
# -2: turn left 90 degrees... |
__source__ = 'https://leetcode.com/problems/flip-string-to-monotone-increasing/'
# Time: O(N)
# Space: O(N)
#
# Description: Leetcode # 926. Flip String to Monotone Increasing
#
# A string of '0's and '1's is monotone increasing if it consists of some number of '0's (possibly 0),
# followed by some number of '1's (als... |
__source__ = 'https://leetcode.com/problems/integer-to-roman/description/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/integer-to-roman.py
# Time: O(n)
# Space: O(1)
# Math
#
# Description: Leetcode # 12. Integer to Roman
#
# Given an integer, convert it to a roman numeral.
#
# Input is guaranteed to be ... |
__source__ = 'https://leetcode.com/problems/string-compression/'
# Time: O(N)
# Space: O(1)
#
# Description: Leetcode # 443. String Compression
#
# Given an array of characters, compress it in-place.
#
# The length after compression must always be smaller than or equal to the original array.
#
# Every element of the a... |
__source__ = 'https://leetcode.com/problems/perfect-rectangle/'
# https://leetcode.com/problems/perfect-rectangle/#/description
# Time: O(n) or o(nlogn) for sweep line
# Space: O(n) set
#
# Description: Leetcode # 391. Perfect Rectangle
#
# Given N axis-aligned rectangles where N > 0,
# determine if they all together ... |
__source__ = 'https://leetcode.com/problems/add-and-search-word-data-structure-design/description/'
# Time: O(min(n, h)), per operation
# Space: O(min(n, h))
#
# Description: Leetcode # 211. Add and Search Word - Data structure design
#
# Design a data structure that supports the following two operations:
#
# void add... |
__source__ = 'https://leetcode.com/problems/maximum-vacation-days/'
# Time: O(n^2 * k)
# Space: O(n * k)
#
# Description: 568. Maximum Vacation Days
#
# LeetCode wants to give one of its best employees the option to travel among N cities to collect algorithm problems.
# But all work and no play makes Jack a dull boy, ... |
__source__ = 'https://leetcode.com/problems/minimum-time-difference/'
# Time: O()
# Space: O()
#
# Description: 539. Minimum Time Difference
#
# Given a list of 24-hour clock time points in "Hour:Minutes" format,
# find the minimum minutes difference between any two time points in the list.
#
# Example 1:
# Input: ["2... |
__source__ = 'https://leetcode.com/problems/search-in-rotated-sorted-array-ii/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/search-in-rotated-sorted-array-ii.py
# Time: O(logn) When there are duplicates, the worst case is O(n).
# Space: O(1)
# Binary Search
#
# Description: Leetcode # 34. Search for a Ra... |
__source__ = 'https://leetcode.com/problems/shortest-word-distance-iii/'
# https://github.com/kamyu104/LeetCode/blob/master/Python/shortest-word-distance-iii.py
# Time: O(n)
# Space: O(1)
#
# Description: Leetcode # 245. Shortest Word Distance III
#
# This is a follow up of Shortest Word Distance. The only difference ... |
import numpy as np
def make_vect(point1, point2):
"""makes a vector out of 2 points
Args:
point1: first point
point2: second point
Returns:
vector of 2 points (tuple)
"""
return ((point2[0] - point1[0]), (point2[1] - point1[1]))
def get_magnitude(vector):
"""gets th... |
#!/usr/bin/env python
def do_something_with_args(name, *args, show_args=False):
print('Greetings, {}'.format(name))
if show_args and args:
print('Here are the args:')
for arg in args:
print(arg)
print('\n')
def do_something_with_kwargs(name, show_args=False, **kwargs):
... |
#!/usr/bin/env python
"""
A logging demo that shows most of all you'll ever need to know
concerning Python and logging.
"""
import logging
import sys
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)
log_format = logging.Formatter(
'%(asctime)s [%(levelname)s] [%(module)s.%(name)s.%(funcName)s... |
#!/usr/bin/env python
def subtract(num1, num2):
return num1 - num2
func = {
'-': subtract,
}
if __name__ == '__main__':
diff = func['-'](6, 3)
print(diff)
|
import pygame
import TicTacToeBoard
### Values for drawing graphics
BLACK = ( 0, 0, 0)
WHITE = (250, 250, 250)
RED = (250, 0, 0)
BLUE = ( 0, 0, 250)
WIDTH_0 = 0
# The width of one square
WIDTH_1 = 200
WIDTH_2 = 400
# The width of the whole board
WIDTH_3 = 600
# Size and thickness of noughts and cros... |
def vatCalculate(totalprice):
result = totalprice+(totalprice*7)/100
return result
print(vatCalculate(int(input("Price>>")))) |
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