FZU 2272 Frog 第八届福建省赛 （鸡兔同笼水题）

 Problem Description

Therearex frogs and y chicken in a garden. Kim found there are n heads and m legs in the garden. Please tell Kim how many frogs and chicken are there. (A frog has 4 legs, and a chicken has 2 legs.)

 Input

First line contains an integer T (1 ≤ T ≤ 10), represents there are T test cases.

For each test case: Two number n and m.

1<=n, m <=100000. The data is legal.

 Output

For each test case, output two numbers A and B – the number of frog and the number of chicken.

 Sample Input

2

2 6

2 4

 Sample Output

1 1

0 2

 

#include<cstdio>
#include<iostream>
using namespace std;

int main()
{
    int T;
    int n,m,a,b;
    scanf("%d",&T);
    while(T--)
    {
        scanf("%d%d",&n,&m);
        a=(m-2*n)/2;
        b=n-a;
        printf("%d %d
",a,b);
    }
    return 0;
}