Submission #1036333

#	Time	Username	Problem	Language	Result	Execution time	Memory
1036333		juicy	Team Contest (JOI22_team)	C++17	100 / 100	107 ms	9152 KiB

team

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

const int N = 150005;

struct Fenwick {
  int s[N];

  void upd(int i, int x) {
    for (; i < N; i += i & -i) {
      s[i] = max(s[i], x);
    }
  }

  int qry(int i) {
    int res = 0;
    for (; i; i -= i & -i) {
      res = max(res, s[i]);
    }
    return res;
  }
} ft[2];

int n;
int x[N], y[N], z[N];

int main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  cin >> n;
  array<vector<int>, 2> comp;
  for (int i = 1; i <= n; ++i) {
    cin >> x[i] >> y[i] >> z[i];
    comp[0].push_back(y[i]);
    comp[1].push_back(z[i]);
  }
  for (auto it : {0, 1}) {
    sort(comp[it].begin(), comp[it].end());
    comp[it].erase(unique(comp[it].begin(), comp[it].end()), comp[it].end());
  }
  vector<int> ord(n);
  iota(ord.begin(), ord.end(), 1);
  sort(ord.begin(), ord.end(), [&](int i, int j) {
    return x[i] < x[j];
  });
  auto ID = [&](const vector<int> &comp, int x) {
    return lower_bound(comp.begin(), comp.end(), x) - comp.begin() + 1;
  };
  array<int, 2> cands{};
  auto add = [&](int id) {
    int Y = ID(comp[0], y[id]), Z = ID(comp[1], z[id]);
    int rZ = ft[1].qry(Y - 1), lY = ft[0].qry(Z - 1);
    if (rZ > z[id]) {
      cands = max(cands, {y[id], rZ});
    }
    if (lY > y[id]) {
      cands = max(cands, {lY, z[id]});
    }
    ft[0].upd(Z, y[id]);
    ft[1].upd(Y, z[id]);
  };
  int res = -1;
  for (int i = 0; i < n; ) {
    int j = i;
    while (j < n && x[ord[i]] == x[ord[j]]) {
      if (cands[0] > y[ord[j]] && cands[1] > z[ord[j]]) {
        res = max(res, x[ord[j]] + cands[0] + cands[1]);
      }
      ++j;
    }
    while (i < j) {
      add(ord[i++]);
    }
  }
  cout << res;
  return 0;
}

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 27 / 27