// editor2
#include<stdio.h>
int main()
{
    int pa,ab,ia;
    float rb;
    scanf("%d %d %d",&pa, &ab, &ia);
    if(pa<=0 || ab<=0 || (ial!=0 && ia!=1))
    {
        printf("Invalid input");
    }
    else if (ia==0)
    {
        printf("Account Inactive");
    }
    else if(pa>ab)
    {
        printf("Insufficient Balance");
    }
    else
    {
        rb=ab-pa;
        printf("%.2f",rb);
    }
    return 0;
}