摘要： 难度 中等 题目 Leetcode: 设计一个算法，找出数组中最小的k个数。以任意顺序返回这k个数均可。 题目解析这几天返校，就摸鱼几天吧，尬住了 1 class Solution { 2 public: 3 vector<int> smallestK(vector<int>& arr, int k 阅读全文

摘要： 难度 1400 题目 Codeforces: B. Two Buttons time limit per test 2 seconds memory limit per test Vasya has found a strange device. On the front panel of a de 阅读全文

摘要： 难度 中等 题目 Leetcode: 这里有 n 个航班，它们分别从 1 到 n 进行编号。 有一份航班预订表 bookings ，表中第 i 条预订记录 bookings[i] = [firsti, lasti, seatsi] 意味着在从 firsti 到 lasti （包含 firsti 和 阅读全文

摘要： 难度 中等 题目 Leetcode: You are given an array of positive integers w where w[i] describes the weight of ith index (0-indexed). We need to call the functio 阅读全文

摘要： 难度 1400 题目 Codeforces: C. Given Length and Sum of Digits... time limit per test 1 second memory limit per test 256 megabytes You have a positive integ 阅读全文

摘要： 难度 题目 Codeforces: B. Scenes From a Memory time limit per test 1 second memory limit per test 256 megabytes During the hypnosis session, Nicholas sudde 阅读全文

摘要： 难度 中等 题目 Leetcode: All Paths From Source to Target Given a directed acyclic graph (DAG) of n nodes labeled from 0 to n - 1, find all possible paths fr 阅读全文

摘要： 难度 中等 题目 Leetcode: You are playing a simplified PAC-MAN game on an infinite 2-D grid. You start at the point [0, 0], and you are given a destination p 阅读全文

摘要： 难度 1300 题目 Leetcode: D. Make a Power of Two time limit per test 1 second memory limit per test 256 megabytes You are given an integer nn. In 11 move, 阅读全文

摘要： 难度 困难 题目 Leetcode: An attendance record for a student can be represented as a string where each character signifies whether the student was absent, la 阅读全文