04 2020 档案

摘要：题目如下： Given the array nums, obtain a subsequence of the array whose sum of elements is strictly greater than the sum of the non included elements in s 阅读全文

摘要：题目如下： Given an integer n. Each number from 1 to n is grouped according to the sum of its digits. Return how many groups have the largest size. Example 阅读全文

摘要：题目如下： Implement the class UndergroundSystem that supports three methods: 1. checkIn(int id, string stationName, int t) A customer with id card equal t 阅读全文

摘要：题目如下： There are n soldiers standing in a line. Each soldier is assigned a unique rating value. You have to form a team of 3 soldiers amongst them unde 阅读全文

摘要：题目如下： Given an array of integers arr, a lucky integer is an integer which has a frequency in the array equal to its value. Return a lucky integer in t 阅读全文