#include<stdio.h>
int main()
{
    int p,b,a;
    scanf("%d %d %d",&p, &b, &a);
    if(a ==0)
       printf("Account Inactive");
    else if(p>b)
       printf("Insufficient Balance");
    else if
       printf("%.2f",(float)(b-p));
       else 
       (a !=1)
       printf("Invalid input");
   return 0;  
}