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