18.04.2024.cpp

class Solution {
  public:
    //Function to find two repeated elements.
    vector<int> twoRepeated (int arr[], int n) {
        // Your code here
        vector<int>ans;
        for(int i=0;i<n+2;i++){
            int ind=abs(arr[i]);
            if(arr[ind]>0){
                arr[ind]=-arr[ind];
            }
            else{
                ans.push_back(ind);
            }
        }
        return ans;
    }
};