Overlapping Intervals

//{ Driver Code Starts
#include<bits/stdc++.h>
using namespace std;

// } Driver Code Ends
class Solution {
public:
    vector<vector<int>> overlappedInterval(vector<vector<int>>& intervals) {
         // Code here
         sort(intervals.begin(), intervals.end());

         int start=intervals[0][0];
         int end=intervals[0][1];
         vector<vector<int>> result;
         for(int i = 1; i < intervals.size(); i++) {
        if(intervals[i][0] <= end) {
            end = max(end, intervals[i][1]);
        } else {
            result.push_back({start, end});
            start = intervals[i][0];
            end = intervals[i][1];
        }
    }

    result.push_back({start, end});

         return result;

    }
};

//{ Driver Code Starts.
int main(){
    int tc;
    cin >> tc;
    while(tc--){
        int n;
        cin >> n;
        vector<vector<int>>Intervals(n);
        for(int i = 0; i < n; i++){
            int x, y;
            cin >> x >> y;
            Intervals[i].push_back(x);
            Intervals[i].push_back(y);
        }
        Solution obj;
        vector<vector<int>> ans = obj.overlappedInterval(Intervals);
        for(auto i: ans){
            for(auto j: i){
                cout << j << " ";
            }
        }
        cout << "\n";
    }
    return 0;
}
// } Driver Code Ends