// editor2
#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    float r;
    scanf("%d",&paymentAmount);
    scanf("%d",&accountBalance);
    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-paymentAmount;
        printf("%.2f",r);
    }
    return 0;
}