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