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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. typedef long long ll;
  5.  
  6. const ll INF = (ll)(1e18);
  7.  
  8. struct Event {
  9.     int typ;   // 1 - otwarcie, -1 - zamkniecie
  10.     int poz;
  11. };
  12.  
  13. bool comp(Event a, Event b) {
  14.     if (a.poz != b.poz) return a.poz < b.poz;
  15.  
  16.     return a.poz > b.poz;
  17. }
  18.  
  19. int main() {
  20. 	ios_base::sync_with_stdio(0);
  21. 	cin.tie(0);
  22.  
  23.     int n;
  24.     cin >> n;
  25.  
  26.     vector<Event> events;
  27.     for (int i = 0; i < n; i++) {
  28.         int a, b;
  29.         cin >> a >> b;
  30.  
  31.         events.push_back({1, a});
  32.         events.push_back({-1, b});
  33.     }
  34.  
  35.     sort(events.begin(), events.end(), comp);
  36.  
  37.     int X = 0;
  38.     int Y = n;
  39.     ll still_not_open_sum = 0LL;
  40.     ll max_time = events.back().poz;
  41.     ll already_closed_sum = 0LL;
  42.  
  43.     for (int i = 0; i < events.size(); i++) {
  44.         if (events[i].typ == 1) {
  45.             still_not_open_sum += max_time - events[i].poz;
  46.         }
  47.     }
  48.  
  49.     ll ans = INF;
  50.     int meeting_time = -1;
  51.  
  52.     for (int i = 0; i < events.size(); i++) {
  53.         int typ = events[i].typ;
  54.         ll poz = events[i].poz;
  55.  
  56.         if (typ == 1) {
  57.             Y--;
  58.             still_not_open_sum -= max_time - poz;
  59.         } else {
  60.             X++;
  61.             already_closed_sum += poz;
  62.         }
  63.  
  64.         ll cost_left = X*poz - already_closed_sum;
  65.         ll cost_right = Y*(max_time - poz) - still_not_open_sum;
  66.  
  67.         if (ans > cost_left + cost_right) {
  68.             ans = cost_left + cost_right;
  69.             meeting_time = poz;
  70.         }
  71.     }
  72.  
  73.     cout << meeting_time << ' ' << ans;
  74.  
  75.     return 0;
  76. }
  77.  
Success #stdin #stdout 0.01s 5516KB
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https://ideone.com/wKJ7HG
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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