39-Remove Duplicates from Sorted Array

1. Remove Duplicates from Sorted Array My Submissions QuestionEditorial Solution
   
   Total Accepted: 127836 Total Submissions: 381794 Difficulty: Easy
   
   Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length.

Do not allocate extra space for another array, you must do this in place with constant memory.

For example,

Given input array nums = [1,1,2],

Your function should return length = 2, with the first two elements of nums being 1 and 2 respectively. It doesn’t matter what you leave beyond the new length.

Submission Details

161 / 161 test cases passed.

Status: Accepted

Runtime: 32 ms

思路：so easy

class Solution {
public:
    int removeDuplicates(vector<int>& nums) {
        size_t n = nums.size();
        int count=0,i=0;
        while(i<n){
            if(i>0&&nums[i]==nums[i-1])count++;
            else nums[i-count] = nums[i];
            i++;
        }
        return n-count;
    }
};