#include<stdio.h>
int main()
{
    int pa,ab,ia;
    float rb;
    scanf("%d %d %d",&pa,&ab,&ia);
    if (pa<=0 || ab<=0 || (ia!=0 && ia!1))
{
    printf("Invalid  input");
}
    else if (ia==0)
{
    printf("Account Inactive");
}
    else if (pa>pb)
    {
        printf("Insufficient Balance");
    }
    else
    {
        rb=ab-pa;
        printf("%.2f",rb);
    }
    return 0;
}