80. Remove Duplicates from Sorted Array II (Array)
Follow up for "Remove Duplicates":
What if duplicates are allowed at most twice?
For example,
Given sorted array nums = [1,1,1,2,2,3]
,
Your function should return length = 5
, with the first five elements of nums being 1
, 1
, 2
, 2
and 3
. It doesn't matter what you leave beyond the new length.
class Solution { public: int removeDuplicates(vector<int>& nums) { int n = nums.size(); if(n<=2) return n; int p = 2; for (int i = 2; i< n; i++) { if(nums[i]>nums[p-2]) { nums[p++] = nums[i]; } } return p; } };