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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。#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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