codility

// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int solution(int N) {
        // write your code in Java SE 8
        int tempMod=0;
        int length=0;
        int posOne=-1;
        int step=0;
         while(N>0){
             tempMod=(N%2);
             if(tempMod==1){

                 if(posOne>=0){
                     length=(length < (step-posOne-1))?(step-posOne-1):length;
                     }
                 posOne=step;
                 }

             step++;
             N=(N/2);
             }
        return length;
    }
}

public int solution(int[] A) {
        // write your code in Java SE 8
        int i=0;
        int result=0;
        while(i<A.length){

            result=(result^A[i]);
            i++;
            }
        return result;
    }

// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int[] solution(int[] A, int K) {
        // write your code in Java SE 8
        int[] newA = new int[A.length];
        int i=0;
        while(i<A.length){
            newA[(i+K)%(A.length)]=A[i];
            i++;
            }

            return newA;
    }
}