#include<stdio.h>
int main()
{
    double paymentAmount, accoutntBalance;
    int isActive;
    
    if(scanf("%lf%lf%d",&paymentAmount, &accoutntBalance,&isActive)!= 3)
    {
        printf("Invalid input\n");
        return 0;
    }
    if(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;
    }
    double remainingBalance = accountBalance - paymentAmount;
    printf("%.2f\n", remainingBalance);
    return 0;
}