Given an undirected graph, return true if and only if it is bipartite. R...

DFS, BFS 假设点的数目为v, time complexity都为O(v)space complexity, BFS worst case...

Given a 01 matrix M, find the longest line of consecutive one in the mat...

Given two sentences words1, words2 (each represented as an array of stri...

On the first row, we write a 0. Now in every subsequent row, we look at ...

You are playing a simplified Pacman game. You start at the point (0, 0),...

In a given array nums of positive integers, find three non-overlapping s...

There is a box protected by a password. The password is n digits, where ...