#include<stdio.h>
int main()
{
 int paymentAmount,accountBalance,isActive;
 float a;
 scanf ("%d",&paymentAmount);
 scanf ("%d",&accountBalance);
 scanf ("%d",&isActive);
 if(paymentAmount<=1||paymentAmount>1000000||accountBalance<=1||accountBalance>100000)
 {
     printf ("Invalid input");
 }
 else if(accountBalance<paymentAmount)
 {
     printf ("Insufficient Balance");
 }
 else if(isActive==0)
 {
     printf ("Account Inactive");
 }
 else(a=accountBalance-paymentAmount)
 {
     printf ("%.2f",a);
 }
}