Select Condition 1

CREATE TABLE #Temp (ids INT)

INSERT INTO #Temp VALUES (1)
INSERT INTO #Temp VALUES (2)
INSERT INTO #Temp VALUES (3)
INSERT INTO #Temp VALUES (4)
INSERT INTO #Temp VALUES (5)

Condition :
If I pass parameter as -1 it should return records having ids 1 or 3.
If I pass parameter as 5 it should return only records having ids 5.

DECLARE @a INT
--SET @a = -1
SET @a = 5

SELECT * FROM #Temp WHERE ((ids = 1 OR ids = 3) AND @a = -1) OR ids = @a