#include<stdio.h>
int main(){
    double paymentAccount, accountBalance;
    int isActive;
    if (scanf("%1f %1f %d", &paymentAmount, &accoutBalance,&isActive) !=3){
        printf("Invalid input\n");
        return 0;
    } if (paymentAmount < 0 || paymentAmount > 1000000 || accountBalance >
    1000000 || (isActive != 0 && isactive != 1)){
        printf("Invalid input\n");
        return 0;
    }
    if (isActive == 0){
        printf("Account Inactive\n");
        return 0;
    }
    if (paymentAccount > accountBalance){
        printf("Account Balance\n");
        return 0;
    }
    double remainingBalance = accountBalance - paymentAccount;
    printf("%.2f\n",remainingBalance);
    return 0;
}