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