简单枚举的例子：生理周期

//简单枚举的例子：生理周期
#include<stdio.h>

int main()
{
	int p,e,i,d,j,n=1;
	scanf("%d%d%d%d",&p,&e,&i,&d);
	while(p!=-1&&e!=-1&&i!=-1&&d!=-1)
	{
		for(j=d+1;j<21252;j++)
			if((j-p)%23==0) break;
		for(;j<21252;j=j+23)
			if((j-e)%28==0) break;
		for(;j<21252;j=j+23*28)
			if((j-i)%33==0) break;
		printf("Case %d",n);
		printf(":the next triple peak occurs in %d days.
",j-d);
		scanf("%d%d%d%d",&p,&e,&i,&d);
		n++;
	}
	return 0;
}