// editor2
#include<stdio.h>
int main()
{
    int amount,balance,active;
    (scanf("%d\n",&amount)
    scanf("%d\n",&balance)
    scanf("%d\n",&active)
   if(amount<0 || balance<0|| (active!=1 && active!= 0))
    {
        printf("Inavlid Input");
        return 0;
    }
    else if(active==0)
    {
        printf("Account Inactive");
    }
    else if(amount>balance)
    {
        printf("Insufficient Balance");
    }
    
    else
    {
        float remaining=balance-amount;
        printf("%.2f\n",remaining);
    }
    return 0;
}