#include<iostream>
using namespace std;
struct num {
	int a, b, c, d, t;
};
int main() {
	int a = 0, b = 0, c = 0, d = 0, f = 0;
	num all[300];
	while (!(a == -1 && b == -1 && c == -1 && d == -1)) {
		cin >> a >> b >> c >> d;
		all[f].a = a;
		all[f].b = b;
		all[f].c = c;
		all[f].d = d;
		f++;
	}
	f--;
	for (int i = 0; i < f;i++) {
		int e = c;
		a = all[i].a;
		b = all[i].b;
		c = all[i].c;
		d = all[i].d;
		a = a % 23;
		b = b % 28;
		c = c % 33;
		c += 33;
		while (!(c % 23 == a && c % 28 == b)) {
			c += 33;
		}
		while (c < d)
			c += e;
		all[i].t = c - d;
	}
	for (int i = 0; i < f; i++)
		while (all[i].t>21252)
			all[i].t -= 21252;
	for (int i = 0; i < f; i++)
		cout << "Case "<<i+1<<": the next triple peak occurs in "<< all[i].t <<" days." << endl;
	return 0;
}
随手写的 有点丑 有点暴力。

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