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