#include<stdio.h>
void main()
{
    int p,b,a;
    scanf("%d",&p);
    scanf("%d",&b);
    scanf("%d",&a);
    if(isnum(a)==0||isnum(p)==0||isnum(b)==0)
    {
    printf("Invalid input");
    }
    else if(isnum(a)==1||isnum(p)==1||isnum(b)==1)
    {
    if(a==0)
    {
        printf("Account Inactive");
    }
    else if(a==1)
    {
     if(b<p)
     {
         printf("Insufficient Balance");
     }
     else
    {
    
     printf("%.2f",b-p);
    }
    return 0;
}