#include<stdio.h>
int main()
{
    int paymentAmount,isActive;
    float accountBalance;
    scanf("%d",&paymentAmount);
    scanf("%d",&isActive);
    scanf("%f",&accountBalance);
    if(accountBalance<paymentAmount)
    {
        printf("insufficient balance");
    }
    else if(isActive==0)
    {
        printf("Account Inactive");
    }
    else if(accountBalance>=paymentAmount)
    {   
        float(accountBalance==accountBalance-paymentAmount);
        printf("%.2f\n",accountBalance);
    }
    else
    {
        printf("Invalid input");
    }
    return 0;
    
}