#include<stdio.h>
void 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);
}
}