Given an undirected graph, return true if and only if it is bipartite. Recall that a gr...
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785. Is Graph Bipartite?
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562. Longest Line of Consecutive One in Matrix
Given a 01 matrix M, find the longest line of consecutive one in the matrix. The line c...
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734. Sentence Similarity
Given two sentences words1, words2 (each represented as an array of strings), and a lis...
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779. K-th Symbol in Grammar
On the first row, we write a 0. Now in every subsequent row, we look at the previous ro...
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789. Escape The Ghosts
You are playing a simplified Pacman game. You start at the point (0, 0), and your desti...
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802. Find Eventual Safe StatesIn a directed graph, we start at some node and every turn, walk along a directed edge o...
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689. Maximum Sum of 3 Non-Overlapping Subarrays
In a given array nums of positive integers, find three non-overlapping subarrays with m...
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753. Cracking the Safe
There is a box protected by a password. The password is n digits, where each letter can...
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780. Reaching Points
A move consists of taking a point (x, y) and transforming it to either (x, x+y) or (x+y...
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774. Minimize Max Distance to Gas Station
Minimize Max Distance to Gas Station On a horizontal number line, we have gas stations ...
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486. Predict the Winner
Given an array of scores that are non-negative integers. Player 1 picks one of the numb...
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398. Random Pick Index
Given an array of integers with possible duplicates, randomly output the index of a giv...
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768. Max Chunks To Make Sorted II
題目大意：給一個排列，可能有重復(fù)元素，我們將數(shù)組拆分成一些“塊”（分區(qū)），并對每個塊進行單獨排序。連接它們之后，結(jié)果等于排序后的數(shù)組。問最多能夠分成多少個分區(qū)（塊）分析：因為...
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644. Maximum Average Subarray II
Given an array consisting of n integers, find the contiguous subarray whose length is g...
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726. Number of AtomsGiven a chemical formula (given as a string), return the count of each atom. An atomic ...
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727. Minimum Window Subsequence
Given strings S and T, find the minimum (contiguous) substring W of S, so that T is a s...
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484. Find Permutation
By now, you are given a secret signature consisting of character 'D' and 'I'. 'D' repre...
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679. 24 Game
You have 4 cards each containing a number from 1 to 9. You need to judge whether they c...
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415. Add Strings
Given two non-negative integers num1 and num2 represented as string, return the sum of ...