01. Guinea Pig

#include <iostream>
#include <string>

using namespace std;

int main() {
    double food, hay,cover, weight;
    cin >> food >> hay >> cover >> weight;

    for (int i = 1; i <= 30; i++) {
        food -= 0.3;
        if (i % 2 == 0) {
            hay -= food * 0.05;
        }
        if (i % 3 == 0) {
            cover -= weight / 3;
        }
    }

    if (food < 0 || hay < 0 || cover < 0) {
        cout << "Merry must go to the pet store!" << endl;
    }
    else {
        printf("Everything is fine! Puppy is happy! Food: %.2f, Hay: %.2f, Cover: %.2f.", food, hay, cover);
    }
    return 0;
}