leetcode 27 移除元素

题目链接：leetcode 27 移除元素

class Solution {
    public int removeElement(int[] nums, int val) {
        if(nums.length==0){
            return 0;
        }
        int left=0;
        int right = nums.length-1;
        while(left <= right){
            if(nums[left]==val){
                while(left < right && nums[right] == val){
                    right -= 1;
                }
                nums[left] = nums[right];
                nums[right] = val;
                right -= 1;
            }
            left += 1;
        }
        if(left-1>=0 && nums[left-1]==val){
            return left-1;
        }else{
            return left;
        }
        
    }
}