#define _CRT_SECURE_NO_WARNINGS #include<stdio.h> int main() { float price; int m, d, e; scanf("%f %d %d %d", &price, &m, &d, &e); if (m==12&&d==12) { if (e) { price = price * 0.8 - 50; } else { price = price * 0.8; } } else if (m == 11 && d == 11) { if (e) { pr...