xinyu04

摘要： You are given two 0-indexed arrays of strings startWords and targetWords. Each string consists of lowercase English letters only. For each string in t 阅读全文

摘要： You are blindfolded before a table. On the table are a very large number of pennies. You are told 128 of the pennies are heads up and the rest are tai 阅读全文

摘要： One one side of a river are three humans, one big monkey, two small monkeys, and one boat. Each of the humans and the big monkey are strong enough to 阅读全文

摘要： Given an m x n binary matrix mat, return the length of the longest line of consecutive one in the matrix. The line could be horizontal, vertical, diag 阅读全文

摘要： You are given an n x n integer matrix grid where each value grid[i][j] represents the elevation at that point (i, j). The rain starts to fall. At time 阅读全文

摘要： You are given a 0-indexed array of positive integers w where w[i] describes the weight of the ith index. You need to implement the function pickIndex( 阅读全文

摘要： There are n people in a social group labeled from 0 to n - 1. You are given an array logs where logs[i] = [timestampi, xi, yi] indicates that xi and y 阅读全文

摘要： Evaluate the value of an arithmetic expression in Reverse Polish Notation. Valid operators are +, -, *, and /. Each operand may be an integer or anoth 阅读全文

摘要： An attendance record for a student can be represented as a string where each character signifies whether the student was absent, late, or present on t 阅读全文

摘要： You choose one of two identical looking bags at random. One bag has three black marbles and one white marble. The other has three white marbles and on 阅读全文