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不用中国剩余定理,不用暴力枚举,16ms过的一个代码。

Posted by 20092462 at 2010-01-31 22:42:14 on Problem 1006
#include<stdio.h>
int main()
{
	int p,e,i,k,d,t,r,x;

	x=0;
	while(scanf("%d %d %d %d",&p,&e,&i,&d) && p!=-1)
	{
		x++;
		p=p%23; e=e%28; i=i%33;
		t=e-p;
		k=0;
		while(t%23!=0)
		{
			k++;
			t+=5;
		}

		t=e+k*28;

		r=t-i;
		k=0;
		while(r%33!=0)
		{
			k++;
			r+=611;
		}

		r=t+k*644;

		if(r>d) r=r-d; else r=r+21252-d;
			
		printf("Case %d: the next triple peak occurs in %d days.\n",x,r);
	}

	return 0;
}

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