hacker rank java 34th problem solution(Hash set)

34. HASH SET

//Write your code here

HashSet<String> pairs = new HashSet<String>(t);

    for(int i = 0; i < t; i++)

    {

        pairs.add("(" + pair_left[i] + ", " + pair_right[i] + ")" );

        System.out.println(pairs.size());        

    }

--Sundaram Dubey