package asd3;
public class Demo3 { public static void main(String[] args) { for (int a = 4; a<= 20; a++) { for (int b = 3; b <= a-1; b++) { for (int c = 2; c <= b-1; c++) { for (int d =1 ; d <=c-1; d++) { if (1.0/a+1.0/b+1.0/c+1.0/d==1) { System.out.println(“开始有”+a+“人”+“第一轮后”+b+“人”+“第二轮后”+c+“人”+“第三轮后”+d+“人”+“第四轮后0人”); } } } } } } }
