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