if any duplicate data in table then status show 1 of all data unique in table then status show o in sql server

I have small question about SQL Server - how to solve this issue?

Table: emp

id | name | sal
----------------
 1 | abc  | 100
 2 | ha   | 200
 1 | abc  | 100
 1 | abc  | 100
 1 | abc  | 100
 2 | ha   | 200
 2 | ha   | 200
 3 | hai  | 400

Based on this data I want give data duplicate or not in the table for that status i out show output.

I tried like this:

select case when count(*)>1 then 1 else 0 end as 'Status'from emp group by id,name,sal

I get this output:

status
1
1
0

I do not want get output like above way.

I want show output like below

Status
    1

when data comes unique in table that time status shows : 0 value only

1 means duplicate data and o means unique records in that table. if any records have duplicate finaly output show one(1) only .no need to display corresponding duplicate values status show 1 .If all records unique in that table I want display only 0(zero). no need to display corresponding unique value status please tell me how to get singe status values to achive this issue.