#include<stdio.h>
int main()
{
    float paymentAmount,accountBalance;
    int isActive;
    is(scanf ("%f %f %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;
}