摘要：C.Sort 题目描述 You are given two strings and bof length n. Then, you are (forced against your will) to answer q queries. For each query, you are given a 阅读全文

摘要：D.Fun 题目描述 Given two integers n and x, find the number of triplets (a,b,c) of positive integers such that ab+ac+bc≤nand a+b+c≤x. Note that order matte 阅读全文

摘要：A.LCM Problem 题目描述 Let LCM(x,y) be the minimum positive integer that is divisible by both x and y. For example, LCM(13,37)=481 , LCM(9,6)=18. You are 阅读全文

摘要：A.Rudolf and the Ticket 题目描述 Rudolf is going to visit Bernard, and he decided to take the metro to get to him. The ticket can be purchased at a machin 阅读全文

摘要：A.Fafa and his Company 题目描述 Fafa owns a company that works on huge projects. There are n employees in Fafa's company. Whenever the company has a new p 阅读全文