#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 ("rAccount Inactive\n");
}
    else if (paymentAmount > accountBalance) {
    printf("Insufficient Balance\n");
}
    else{
    float remaining = (float)(accountBalance - paymentAmount);
    printf("%.2f\n", remaining);
}
    return 0;
}