#include<stdio.h>
int main(){
    double paymentAmount, acccountBalance;
    int isActive;
    if(scanf("%lf %lf %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");
        return 0;
    }
    if (isActive == 0){
        printf("Account Inactive\n");
        return 0;
    }
    if (paymentAmount > amountBalance){
        printf("IInsufficient Balance");
        return 0;
    }
    double remainingBalance = accountBalance - paymentAmount;
    printf("%.2f\n",remainingBalance);
    return 0;
}