#include <stdio.h>

int main() {
    int usd_amount;
    
    printf("Enter the amlunt in USD: ");
    scanf("%d", &usd_amount);
    
    if (usd_amount < 0) {
        printf("Invalid input\n");
    } else {
        double eur_amount = usd_amount * USD_TO_EUR_RATE;
        printf("%.2f\n", eur_amount);
    }
    
    return 0;
    
}