xinyu04

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