#include <stdio.h>
int main() {
    float paymentAmount, accountBalance;
    int isActive;
    if (scanf("%f %f %d", &paymentAmount, &accountBalance, &isActive) !=3) {
        printf("Invalid input\n");
        return 0;
    }
    if (paymentAmount < 0 || paymentAmount > 1000000 ||
        accountBalance < 0 || accountBalance > 1000000 ||
        (isActive != 0 && isActive !=1)) {
        printf("Invalid input\n");
        return 0;
    }
     if (isActive == 0) {
         printf("Account inactive\n");
    }
    else if (pymentAmount > accountBalance) {
        printf("Insufficient Balance\n");
    else {
         float remainingaBalance = accountBalance - paymentAmount;
         printf("%.2f\n", remainingBalance);
    }   
    return 0;
}