#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>ab)
    {
        printf("Insufficient balance");
    }
    else
    {
        rb=ab-pa;
        printf("%.2f",rb);
    }
    return 0;
}