#include<stdio.h>
int main()
{
    int a;
    int b;
    int c;
    if(scanf("%d %d %d",&a,&b,&c)==3)
   {
        if(a<0 || b<0 || c>1)
     
            {    printf("Invalid input\n");   }

        else if(c==0)

        {    printf("Account Inactive");}

        else if(b>=a)
{
            float d=b-a;
            printf("%0.2f\n",d);}
        else if

            {printf("Insufficient Balance\n");}

                       
        else
          {
            printf("Invalid input\n");
          }
        
        return 0;
    
    }
}