#include <iostream>
using namespace std;
#define Preco 0.30
#define Preco_promocional 0.25
int main() {
int quantidades;
float tp;
cin >> quantidades;
if (quantidades < 12){
tp = quantidades * Preco;
}
else {
tp = quantidades * Preco_promocional;
}
cout << "Total a pagar: " << tp;
return 0;
}
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