#include <stdio.h>

#define MIN_AGE 21
#define VIP_MIN_AGE 40

#define VIP_NIGHT 0

int main(void) {
    int age;

    printf("Please enter the person's age: ");
    scanf("%d", &age);

    if (age >= MIN_AGE) {
        printf("Congrats! You're in (and old)\n");
    }
    if (age >= VIP_MIN_AGE && VIP_NIGHT) {
        printf("Welcome, VIP");
    } else {
        printf("You are too young!\n");
    }

    return 0;
}