#include <stdio.h>
int main()
{
    int paymentAmount, accountBalance, isActive;
    if (scanf("%d", &paynentAmount)!=1 || scanf("%d",&accountBalance) !=1 || scanf("%d",&isActive) !=1){
        printf("Invalid input");
        return 0;
    }
    if (paymentAmount < 0 || paymentAccount > 1000000 || accountBalance < 0 || accountBalance > 1000000 || (isActive != 0 && isActive != 1)){
        printf("Invalid input");
        return 0;
    }
    if(isActive == 0){
        printf("Account Inactive");
        return 0;
    }
    if (paymentAccount > accountBalance){
        printf("Insufficient Balance");
        return 0;
    }
    if (paymentAmount > accountBalance) {
        printf("Insufficient Balance");
        return 0;
    }
    float remaining = accountBalance - paymentAmmount;
    printf("%.2f", remaining);
    return 0;
}