80. 删除有序数组中的重复项 II

方法一

class Solution {
public:int removeDuplicates(vector<int>& nums) {int len = 0;for(auto num : nums)if(len < 2 || nums[len-2] != num)nums[len++] = num;return len;}
};

方法二

class Solution {
public:int removeDuplicates(vector<int>& nums) {int numsLength = nums.size();if(numsLength <= 2){return numsLength;}int fast = 2, slow = 2;while(fast < numsLength){if(nums[slow - 2] != nums[fast]){nums[slow] = nums[fast];slow++;}fast++;}return slow;}
};