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