题目描述 Given a 2D binary matrix filled with 0’s and 1’s, find the largest square containing all 1’s and return i…

题目描述 Implement a trie with insert, search, and startsWith methods. Note: You may assume that all inputs are co…

1. 题目 Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings r…

题目 数组的每个索引做为一个阶梯，第 i个阶梯对应着一个非负数的体力花费值 cost[i](索引从0开始)。 每当你爬上一个阶梯你都要花费对应的体力花费值，然后你可以选择继续爬一个阶梯或者爬两个阶梯。 您需要找到达到楼层…

  Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the …

1. 题目 Given an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique…

  Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numb…

  Imagine you have a special keyboard with the following keys: Key 1: (A): Print one ‘A’ on s…

Longest Consecutive Sequence Given an unsorted array of integers, find the length of the longest consecutive e…

  Write a program that outputs the string representation of numbers from 1 to n. But for multiples o…

题目描述 Given an array and a value, remove all instances of that value in place and return the new length. The or…

  Given an array of integers with possible duplicates, randomly output the index of a given target number…