// editor2
#include<stdio.h>
int main()
{
    int paymentamount,accountbalance,isactive;
    float remaining balance;
    scanf("%d",&paymentamount);
    scanf("\n%d",&accountbalance);
    scanf("%d",&isactive);
    x=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;
}