public static void main(String args[]){
        NumberOccuringOddTimes noot = new NumberOccuringOddTimes();
        int arr[] = {1,2,9,9,2,1,9,7,2,1,9,1};
        Pair p = noot.twoNumbersOccuringOddTimes(arr);
        System.out.print(p.a + " " + p.b);
    }
http://www.geeksforgeeks.org/find-the-number-occurring-odd-number-of-times/
http://www.geeksforgeeks.org/find-two-non-repeating-elements-in-an-array-of-repeating-elements/
src/com/interview/bits/NumberOccuringOddTimes.java