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OI-codes/AcWing/1300/1300.cpp

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#include <iostream>
using std::cin;
using std::cout;
const char endl = '\n';
int t, p, e, i, d;
int gcd(int a, int b) {
return b ? gcd(b, a % b) : a;
}
int lcm(int a, int b) {
return a / gcd(a, b) * b;
}
int main() {
std::ios::sync_with_stdio(false);
while (cin >> p >> e >> i >> d, ~p && ~e && ~i && ~d) {
int l = 21252,
ans = (5544 * p + 14421 * e + 1288 * i - d + l) % l;
cout << "Case " << ++t << ": the next triple peak occurs in " << (ans ? ans : l) << " days." << endl;
}
return 0;
}