#include<stdio.h>
int main(){
    double withdrawal_amount, cureent_balance;
    int account_status;
    scanf("%lf", &withdrawal_amount);
    scanf("%lf", &current_balance);
    scanf("%lf", &account_status);
    if (account_status == 0) {
        printf("Account inactive\n");
    } else if (current_balance < withdrawal_amount){
        printf("Insufficient balance\n");
    } else {
        printf("%.2lf\n", current_balance);
    }
    return 0;
}