摘要： 难度 中等 题目 Leetcode: 752.Open the Lock You have a lock in front of you with 4 circular wheels. Each wheel has 10 slots: '0', '1', '2', '3', '4', '5', '6 阅读全文

摘要： 难度 1700 题目 CodeForces: D. Flowers time limit per test 1.5 seconds memory limit per test 256 megabytes We saw the little game Marmot made for Mole's lu 阅读全文

摘要： 难度 1300 题目 CodeForces: C. Registration system time limit per test 5 seconds memory limit per test 64 megabytes A new e-mail service "Berlandesk" is go 阅读全文

摘要： 难度 中等 题目 Leetcode： 1838. Frequency of the Most Frequent Element The frequency of an element is the number of times it occurs in an array. You are give 阅读全文

摘要： 难度 中等 题目 Leetcode: 面试题 10.02. Group Anagrams LCCI Write a method to sort an array of strings so that all the anagrams are in the same group. Example I 阅读全文

摘要： 难度 1500 题目 CodeForces: Boredom time limit per test 1 second memory limit per test 256 megabytes Alex doesn't like boredom. That's why whenever he gets 阅读全文

摘要： 难度 简单 题目 Leetcode: 剑指Offer 53 - Ⅰ. 在排序数组中查找数字 统计一个数字在排序数组中出现的次数。 0 <= array.length() <= 50000 题目解析： 懒得解析了，直接map记录，直接输出 以下为参考代码 class Solution { public 阅读全文

摘要： 难度 中等 题目 Leetcode: 1846.Maximum Element After Decreasing and Rearranging You are given an array of positive integers arr. Perform some operations (pos 阅读全文

摘要： 难度 1300 题目 CodeForces: IQ test time limit per test 2 seconds memory limit per test 256 megabytes Bob is preparing to pass IQ test. The most frequent t 阅读全文

摘要： 难度 1200 题目 CodeForces： Vanya and Lanterns time limit per test 1 second memory limit per test 256 megabytes Vanya walks late at night along a straight 阅读全文