#include<stdio.h>
int main()
{
 int a,b,c;
 if(scanf("%d %d %d,&a,&b,&c")==3)
    {
     if(a<0 || b<0 || c>1)
     {
         printf("Invalid input\n");
     }
     else if (c==0)
     {
         printf("Account Inactive");
     }
     else if(b>=a)
     {
     float d=b-a;
     printf("%0.2f\n",d);
     }
     else
     {
     printf("Insufficient Balance\n");
     }
     else 
     {
     printf("Invalid input");   
     }
     return 0;
 }