[LeetCode] 905. Sort Array By Parity

ProblemGiven an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A.You may return any answer array that satisfies this condition.Example 1:Input: [3,1,2,4]Output: [2,4,3,1]The outputs [4,2,3,1], [2,4,1,3], and [4,2,1,3] would also be accepted.Note:1 <= A.length <= 50000 <= A[i] <= 5000Solutionclass Solution { public int[] sortArrayByParity(int[] A) { if (A == null || A.length < 2) return A; int i = 0, j = 0; while (j < A.length) { while (i < j && A[i]%2 == 0) i++; if (A[j]%2 == 0) { int temp = A[i]; A[i] = A[j]; A[j] = temp; i++; } j++; } return A; }}