#include <stdio.h>
int main(){
    double paymentAmount, accountBalance;
    int isActive;
    if (scanf("%lf %lf %d", &paymentAmount, &accountBalance, &isActive) != 3){
        return 0;
    } if (paymentAmount < 0 || paymentAmount > 1e6 || accountBalance < 0 || accountBalance > 1e6 || (isActive != 0 && isActive != 1)){
        printf("Invalid input\n");
        return 0;
    }
    if (!isActive){
        printf("Account Inactive\n");
        return 0;
    }
    if (paymentAmount > accountBalance){
        printf("Insufficient Balance\n");
        return 0;
    }
    double remainingBalance = accountBalance - paymentAmount;
    printf("%.2lf\n",remaining);
    return 0;
}