#include<stdio.h>
int main()
{
     int paymentAmount,accountBalance,isActive;
     float remainingBalance;
    scanf("%d",&paymentAmount);
    scanf("%d",&accountBalance);
    scanf("%d",&isActive);
    if(paymentAmont<=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 
    {
        remainingBalance=accountBalance-paymentAmount;
        printf("%.2f",remainingBalance);
    }
    return 0;
}