#include <stdio.h>

int main() {
    int pay, bal, active;
    scanf("%d %d %d", &pay, &bal, &active);
    if(active != 0 && active != 1) 
    {
        printf("Invalid input");
    }
    else if (active == 0) 
    {
        printf("Account Inactive");
    }
    else if (pay > bal) 
    {
        printf("Insufficient Balance");
    }
    else 
    {
        printf("%.2f",float(bal - pay));
    }
    return 0;
}