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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int removeDuplicates(vector<int>& nums) {
  5.     if(nums.empty()){
  6.     	return 0;
  7.     }
  8.     int j=0; // slow pointer
  9.  
  10.     for (int i = 1; i < nums.size(); i++) {
  11.         if (nums[i] != nums[j]) {
  12.             j++;
  13.             nums[j] = nums[i];
  14.         }
  15.     }
  16.     return j + 1;
  17. }
  18. int main(){
  19. 	vector<int>nums = {1,1,2,2,3};
  20.  
  21. 	int len = removeDuplicates(nums);
  22. 	for (int i = 0; i < len; i++){
  23. 		cout<< nums[i]<<" " ;
  24. 	}
  25.  
  26.  
  27. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/fBlVJY
language:
C++14 (clang 8.0)
created:
3 hours ago
visibility:
public

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