Leetcode 442 Solution

This article provides solution to leetcode question 442 (find-all-duplicates-in-an-array)

https://leetcode.com/problems/find-all-duplicates-in-an-array

Solution

class Solution { public: vector<int> findDuplicates(vector<int>& nums) { vector<int> res;
for (int i = 0; i < nums.size(); i++) { int target = abs(nums[i]) - 1;
if (nums[target] < 0) res.push_back(target + 1); else nums[target] = -nums[target]; }
return res; } };