Remove Element

same as Remove Duplicates from Sorted Array

public class Solution {
    public int removeElement(int[] A, int elem) {
        // IMPORTANT: Please reset any member data you declared, as
        // the same Solution instance will be reused for each test case.
        if(A == null||A.length < 1)
            return 0;
        int slowrunner = -1;
        int fastrunner = 0;
        while(fastrunner < A.length)
        {
            if(A[fastrunner] == elem)
            {
                fastrunner++;
            }
            else
            {
                A[++slowrunner] = A[fastrunner++];
            }
        }
        return slowrunner+1;
    }
}