Submission

Score: 0

User: Pxnny

Problemset: วันว่างๆ

Language: cpp

Time: 0.002 second

Submitted On: 2026-03-20 08:38:53

#include <bits/stdc++.h>
using namespace std;
#define pii pair<int, int>

int main(){
    ios_base::sync_with_stdio(0), cin.tie(0);
    int n;
    cin >> n;
    vector<pii> v;
    while(n--){
        int m, st, e;
        cin >> m;
        for(int i=0; i<m; i++){
            cin >> st >> e;
            v.push_back({st, e});
        }
    }
    sort(v.begin(), v.end());
    int si = v.size();
    bool yes = 0;
    for(int i=0; i<si; i++){
        if(v[i].second < v[i+1].first){
            cout << v[i].second<< " " << v[i+1].first << " ";
            yes = 1;
        }
    }
    if(!yes) cout << -1;
}
/*
3
2 1 2 5 6
1 1 3
1 4 10

3
2 1 3 6 7
1 2 4
2 2 5 9 12

2
1 3 5
1 3 4

*/