HDOJ/HDU 2566 统计硬币(公式~遍历~)

import java.util.Scanner;
/**
 * @author 陈浩翔
 * 2016-5-18
 */
public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int t =sc.nextInt();
        while(t-->0){
            int n =sc.nextInt();
            int m =sc.nextInt();
            int count=0;
            for(int y=0;y<=m/2;y++){
                for(int z=0;z<=m/5;z++){
                    if(4*z+y==m-n&&(n-z-y)>=0){
                        count++;
                    }
                }
            }
            System.out.println(count);
        }
    }
}