#include<stdio.h>
int main()
{
     int paymentAmount, accountBalance, isActive;
     if(scanf("%d %d %d", &paymentAmount, &accountBalance, &isActive) != 3)
     {
         printf("Invalid input\n");
         return 0;
     }
     if (isActive == 0)
     {
         printf("Account Inactive\n");
     }
     else if (paymentAmount > accountBalance)
     {
         printf("Insufficient Balance\n");
     }
     else
     {
         float remaining = (float)(accountBalance - paymentAmount);
         printf(".2f\n", remaining);
     }
     return 0;
}