#includestdio.h>
int main()
{
    int p,b,a;
    if(scanf("%d%d%d",&p,&b,&a)!=3)
    printf("Invalid input");
    else if(!a)
     printf("Account Inactive");
    else if(p>b)
     printf("Insufficient balance");
    else 
     printf("%<2f",(float)(b-p));
     return 0;
}