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