xinyu04

摘要： You are given a list of songs where the ith song has a duration of time[i] seconds. Return the number of pairs of songs for which their total duration 阅读全文

摘要： Given the root of a binary tree, the level of its root is 1, the level of its children is 2, and so on. Return the smallest level x such that the sum 阅读全文

摘要： There is a one-dimensional garden on the x-axis. The garden starts at the point 0 and ends at the point n. (i.e The length of the garden is n). There 阅读全文

摘要： Given an integer array nums of size n, return the minimum number of moves required to make all array elements equal. In one move, you can increment n 阅读全文

摘要： Given a binary string s, return the number of non-empty substrings that have the same number of 0's and 1's, and all the 0's and all the 1's in these 阅读全文

摘要： 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 r 阅读全文

摘要： Given a string s, remove duplicate letters so that every letter appears once and only once. You must make sure your result is the smallest in lexicogr 阅读全文

摘要： You are given three positive integers: n, index, and maxSum. You want to construct an array nums (0-indexed) that satisfies the following conditions: 阅读全文

摘要： You are given an array points, an integer angle, and your location, where location = [posx, posy] and points[i] = [xi, yi] both denote integral coordi 阅读全文

摘要： You are given an m x n integer matrix points (0-indexed). Starting with 0 points, you want to maximize the number of points you can get from the matri 阅读全文