2566：硬币统计

#include<iostream>
using namespace std;
int main()
{
    int t,n,m;
    while(cin>>t)
    {
        while(t--)
        {
            cin>>n>>m;
            int num = 0;
            for(int i = 0;i <= n;i++)
            {
                for(int j = 0;j <= n;j++)
                {
                    for(int k = 0;k <= n;k++)
                    {
                        if(i+2*j+5*k == m&&i+j+k == n)
                        num++;
                    }
                }
            }
            cout<<num<<endl;
        }
    }
}