POJ1006-Biorhythms

#include<iostream>using namespace std;int main(){int p, e, i, d, ans;int num = 1;while (num) {cin >> p >> e >> i >> d;if (p == -1 && e == -1 && i == -1 && d == -1)break;ans = (5544 * p + 14421 * e + 1288 * i) % (23 * 28 * 33) - d;while (ans <= 0)ans += 21252;cout << "Case " << num << ": the next triple peak occurs in " << ans << " days.\n";num++;}return 0;}