#include<stdio.h>
int main()
{
    int paymentAmount, accountBalance, isActive;
    if (scanf("%d %d %d", &paymentAmount, &accountBalance, &isActive)!=3){
        printf("Invalid input");
        return 0;
    }
    if (paymentAmount <0 || accountBalance <0 || paymentAmount > 1000000 || accountBalance > 1000000 || (isActive !=0 && isActive !=1))
    printf("Invalid input");
    return 0;
    
}
    if (isActive ==0){
        printf("Account Inactive");
        return 0;
    }
    if (paymentAmount > accountBalance)
    {
        printf("Insufficient Balance");
        return 0;
    }
    double remainingBalance = accountBalance - paymentAmount;
    printf("%.2f", remainingBalance);
    return 0;
}