27. Remove Element

class Solution {
    public int removeElement(int[] nums, int val) {
        if(nums.length==0)return 0;
        int count = 0;
        for(int i=0;i<nums.length;i++){
            if(nums[i]==val){
                count++;
            }else{
                nums[i-count] = nums[i];
            }
        }
        return nums.length - count;
    }
}