// editor2
#include<stdio.h>
int main()
{
    int paymentamount,accountbalance,isactive;
    float a;
    scanf("%d",&paymentamount);
    scanf("%d",&accountbalance);
    scanf("%d",&isactive);
    {
        printf("Invalid input");
    }
    else if(accountbalance<paymentamount)
    {
        printf("Insufficient balance");
    }
    else if(isactive==0)
    {
        printf("account inactive");
    }
    else{
    printf("%.2f",a);
    }
    }