zoukankan      html  css  js  c++  java
  • cf 478B

    B. Random Teams
    time limit per test
    1 second
    memory limit per test
    256 megabytes
    input
    standard input
    output
    standard output

    n participants of the competition were split into m teams in some manner so that each team has at least one participant. After the competition each pair of participants from the same team became friends.

    Your task is to write a program that will find the minimum and the maximum number of pairs of friends that could have formed by the end of the competition.

    Input

    The only line of input contains two integers n and m, separated by a single space (1 ≤ m ≤ n ≤ 109) — the number of participants and the number of teams respectively.

    Output

    The only line of the output should contain two integers kmin and kmax — the minimum possible number of pairs of friends and the maximum possible number of pairs of friends respectively.

    Sample test(s)
    input
    5 1
    output
    10 10
    input
    3 2
    output
    1 1
    input
    6 3
    output
    3 6
    Note

    In the first sample all the participants get into one team, so there will be exactly ten pairs of friends.

    In the second sample at any possible arrangement one team will always have two participants and the other team will always have one participant. Thus, the number of pairs of friends will always be equal to one.

    In the third sample minimum number of newly formed friendships can be achieved if participants were split on teams consisting of 2 people, maximum number can be achieved if participants were split on teams of1, 1 and 4 people.

    #include<iostream>
    #include<cstdio>
    #include<cstring>
    #include<string>
    #include<cmath>
    #include<algorithm>
    #include<cstdlib>
    using namespace std;
    #define LL long long
    LL n,m,r;
    int main()
    {
          cin>>n>>m;
          r=n/m;
          cout<<m*r*(r-1)/2 + r*(n%m)<<" "<<(n-m+1)*(n-m)/2<<endl;
    }
    

      

  • 相关阅读:
    Lambda表达式效率问题
    设计模式之代理模式
    spring学习之AOP
    jq 中input为radio设置选中状态,attr问题
    css 清除float浮动方法整理
    jquery.ready可以在文档加载后尽快执行对文档的操作
    前端学习网址整理
    图片缓存未触发onload
    spring mvc 下,ajax调用后台controller方法时报415 (Unsupported Media Type)错误
    nodejs向前台send数据时Date类型数据格式问题
  • 原文地址:https://www.cnblogs.com/a972290869/p/4231890.html
Copyright © 2011-2022 走看看