#include<stdio.h>
int main()
{
    float paymentAmount,accountBalance;
    int isActive;
    if(scanf ("%f\n%f\n%d",&paymentAmount ,&accountBalance, &isActive) != 3);
    { 
        printf("Invalid input");
        return 0;
    }
    if(paymentAmount < 0|| accountBalance < 0 ||(isActive != 0 && isActive != 1))
    {
        printf("Invalid input\n");
        return 0;
    }
    if(isActive == 0)
    {
        printf("Account Inactive\n");
        return 0;
    }
    if (paymentAmount > accountBalance)
    {
        printf("Insufficient Balance\n")
        return 0;
    }
    float remainingBalance = accountBalance -paymentAmount;
    printf("%0.2f\n", remainingBalance);
    
    return 0;
}