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