Uncoupled Integer

UncoupledInteger.java

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int result = 0;
        while(scanner.hasNext()) {
            for (String i: scanner.next().split(",")) {
              /** XOR: when you XOR with a integer an even number of times
               * your return value will be 0 or whatever you started with. 
               * E.g A ^ B ^ B = A. Hence can iterate through the array and 
               * only odd one out will remain as everything else is in pairs!
               **/
               result = result ^ Integer.parseInt(i.trim());
            }
        }
        System.out.println(result);
    }