POJ 1006 Biorhythms （入门）

#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
int main() {
int p, e, i, d;
int n = 1;
while(~scanf("%d %d %d %d", &p, &e, &i, &d)) {
if(p == -1 && e == -1 && i == -1 && d == -1) break;
p %= 23, e %= 28, i %= 33;
int j;
for(j = 1; j <= 21252; j++) {
if((j + d) % 23 == p && (j + d) % 28 == e && (j + d) % 33 == i) {
printf("Case %d: the next triple peak occurs in %d days.\n", n++, j);
break;
}
}
}
return 0;
}