#include<stdio.h> int main() { double price = 0.0; int month = 0; int day = 0; int flag = 0; scanf("%lf %d %d %d", &price, &month, &day, &flag); if (month == 11 && day == 11) { price = price * 0.7 - 50.0*flag; } else if (month == 12 && day == 12) { pri...