// edito
#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    float remainingbalance;
    scanf("%d",&paymentAmount);
    scanf("%d",&accountBalance);
    scanf("%d",&isActive);
    
    if
    (paymentAmount<0||paymentAmount>1000000||accountBalance>0||accountBalance>1000000(isAcitve != 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;
    }
    float remainingBalance = accountBalance-paymentAmmount;
    printf("%.2f\n",remainingBalance);
    return 0;
}