// editor2
#include<stdio.h>
int main()
{
    int paymentAmount,accountBalance,isActive;
    float remaining balance;
    scanf("%d",&paymentamount);
    scanf("\n%d",&accountbalance);
    scanf("%d",&isactive);
    remaining balance=accountbalance-paymentamount;
    if(remaining balance<0)
    {
        printf("\nInsufficient balance");
    }
    else if(isActive==0)
    {
        printf("\nAccount Inactive");
    }
    else if(paymentAmount<0 || accountBalance<0 || isActive<0)
    {
        printf("\nInvalid input");
    }
    else
    {
        printf("\n%.2f",remaining balance);
    }
    
    
    return 0;
}