#include<stdio.h>
int main(void)
{
    double paymentAmount, accountBalance;
    int  is Active;
    
    if(scanf("%1f%1f%d",&paymentAmount,&\accountBalance,&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;
}