#include<stdio.h>
int main()
{
   int p,b,a;
   if(scanf("%d%d%d",&p,&b,&a)[=3)
   printf("Invalid input");
   else if(!a)
   printf("Account Inactive");
   else if(p>b)
   printf("Insufficient Balance");
   else
   printf("%.2f",(float)(b-p));
   return 0;
}