> 程序如下
> 
> import java.util.Scanner;
> 
> public class Main {
> 	public static void main(String[] args) {
> 		Scanner in = new Scanner(System.in);
> 	for(int a=1;a>0;a++){
>     int p=in.nextInt(),e=in.nextInt(),i=in.nextInt(),d=in.nextInt(),m=0,n=0,l=0,min;
>     if(p==-1){
>     	if(e==-1){
>     		if(i==-1){
>     			if(d==-1){
>     				
>     				break;
>     			}
>     		}
>     	}
>     }
>  for(int q=1;q!=0 ;q++  ){
>     if(33*28*q%23==1){
>     	m=33*28*q;
>     	q=-1;
>     }
>  }
>  for(int q=1;q!=0 ;q++  ){
> 	    if(33*23*q%28==1){
> 	    	 n=33*23*q;
> 	    	q=-1;
> 	    }
> 	 }
>  for(int q=1;q!=0 ;q++  ){
> 	    if(23*28*q%33==1){
> 	    	l=23*28*q;
> 	    	q=-1;
> 	    }
> 	 }
>   min=m*p+n*e+l*i;
>   min=min%(33*28*23);
> 		for(int j=1;min<21252;j++){
> 			if(min>d){
> 				System.out.print("\n"+"Case"+" "+ a+": the next triple peak occurs in "+(min-d)+" days.")	   ;
> 				break;
> 			}
> 			min+=23*28*33;
> 		}
> 		if(min>21251){System.out.print("\n"+"Case"+ " "+a+": the next triple peak occurs in "+(21252-d)+ " days.")	   ;}
> 	
> 		
> 	}	
> 	
> }
> 
> }