#include <iostream>
using namespace std;
 
int main() {
	int allMoney, priceFirst, plusValue, allCandy;
	cin >> allMoney >> priceFirst >> plusValue >> allCandy;
 
	int sum = 0, candyBought = 0;;
	while (allMoney >= priceFirst && allCandy > 0) {
		++candyBought;
		allMoney -= priceFirst;
		priceFirst += plusValue;
		--allCandy;
	}
	if (allCandy <= 0) {
		cout << "NU SUNT BOMBOANE PE STOC!";
	} else if (allCandy == 0 && allMoney >= priceFirst) {
		cout << "AI MAI FALIMENTAT UN MAGAZIN!";
	} else if (allMoney < priceFirst) {
		cout << candyBought;
	}
	cout <<"\n"<<allMoney;
	return 0;
}

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