#include<stdio.h>
#include<ctype.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    scanf("%d\n%d\n%d",&paymentAmount,&accountBalance,&isActive);
    balance = accountBalance-paymentAmount;
    if((isalpha(paymentAmount)||isalpha(accountBaalance) || isalpha(isActive)) || ((paymentAmount <0)||(accountBalance<0)||
    {
        printf("Invalid input");
    }
    else if(isActive = 0)
    {
        printf("Account Inactive");
    }
    else if(isActive = 1)
    {
        if(paymentAmount > accountBalance)
        {
            printf("Insufficient Balance");
        }
        else
        {
            printf("%.2f",balance);
        }
    }
    else
    {
        printf("Invalid input");
    }
    return 0;
    
}