Submission #586990

#	Time	Username	Problem	Language	Result	Execution time	Memory
586990		MilosMilutinovic	Zagonetka (COI18_zagonetka)	C++14	0 / 100	606 ms	336 KiB

zagonetka

/**
 *    author:  wxhtzdy
 *    created: 01.07.2022 07:54:35
**/
#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);  
  int n;
  cin >> n;
  vector<int> p(n);
  for (int i = 0; i < n; i++) {
    cin >> p[i];
  }
  auto Ask = [&](vector<int> q) {
    cout << "query ";
    for (int i = 0; i < n; i++) {
      cout << q[i] << " ";
    }
    cout << endl;
    int x;
    cin >> x;
    return x;
  };
  vector<vector<bool>> f(n, vector<bool>(n, true));
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      if (i != j && p[i] < p[j]) {
        f[i][j] = false;
      }
    }
  }
  auto Valid = [&]() {
    vector<vector<int>> g(n);
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        if (i != j && f[i][j]) {
          g[i].push_back(j);  
        }
      }
    }
    vector<int> in(n);
    for (int i = 0; i < n; i++) {
      for (int j : g[i]) {
        in[j] += 1;
      }
    }
    vector<int> que;
    for (int i = 0; i < n; i++) {
      if (in[i] == 0) {
        que.push_back(i);
      }
    }
    for (int b = 0; b < (int) que.size(); b++) {
      int i = que[b];
      for (int j : g[i]) {
        in[j] -= 1;
        if (in[j] == 0) {
          que.push_back(j);
        }
      }
    }
    reverse(que.begin(), que.end());
    vector<int> q(n);
    for (int i = 0; i < n; i++) {
      q[que[i]] = i + 1;
    }
    return Ask(q);
  };
  vector<vector<bool>> save(n, vector<bool>(n));               
  for (int it = 0; it < n * (n - 1) / 2; it++) {
    vector<vector<int>> g(n);
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        if (i != j && f[i][j]) {
          g[i].push_back(j);
        }
      }
    }
    pair<int, int> p = {-1, -1};
    for (int i = 0; i < n; i++) {
      vector<int> que(1, i);
      vector<bool> was(n);
      vector<bool> ok(n, true);
      was[i] = true;
      for (int b = 0; b < (int) que.size(); b++) {
        int x = que[b];
        for (int j : g[x]) {
          if (!was[j]) {
            was[j] = true;
            que.push_back(j);
          }
          if (x != i) {
            ok[j] = false;
          }
        }
      }
      bool found = false;
      for (int j = 0; j < n; j++) {
        if (i != j && ok[j] && f[i][j]) {
          if (!save[i][j]) {
            p = make_pair(i, j);
            save[i][j] = true;
            found = true;
            break;
          }
        }
      }
      if (found) {
        break;
      }
    }  
    if (p.first == -1) {
      break;
    }                   
    swap(f[p.first][p.second], f[p.second][p.first]);
    if (Valid()) {
      f[p.first][p.second] = f[p.second][p.first] = false;   
    } else {
      swap(f[p.first][p.second], f[p.second][p.first]);
    }
  }
  vector<pair<int, int>> c;
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      if (i != j && f[i][j]) {
        c.emplace_back(i, j);
      }
    }
  }
  cout << "end" << endl;
  vector<vector<int>> g(n);
  for (int i = 0; i < (int) c.size(); i++) {
    g[c[i].first].push_back(c[i].second);
  }
  vector<vector<int>> path(n);
  for (int i = 0; i < n; i++) {
    vector<int> que(1, i);
    vector<int> in(n);
    for (int j = 0; j < n; j++) {
      for (int p : g[j]) {
        in[p] += 1;
      }
    }
    for (int b = 0; b < (int) que.size(); b++) {
      int x = que[b];
      for (int j : g[x]) {
        in[j] -= 1;
        if (in[j] == 0) {
          que.push_back(j);  
        }
      }
    }
    sort(que.begin(), que.end());
    path[i] = que;
  }
  vector<vector<bool>> ls(n, vector<bool>(n));
  for (int i = 0; i < n; i++) {
    for (int j = i + 1; j < n; j++) {
      bool ok = true;
      for (int p = 0; p < min(path[i].size(), path[j].size()); p++) {
        if (path[i][p] != path[j][p]) {
          ok = (path[i][p] < path[j][p]);
          break;
        }
      }         
      ls[i][j] = ok;
      ls[j][i] = !ok;
    }
  }                      
  {             
    vector<int> ans(n, -1);
    vector<int> in(n);
    for (int i = 0; i < n; i++) {
      for (int j : g[i]) {
        in[j] += 1;
      }
    }
    vector<bool> alive(n);
    for (int i = 0; i < n; i++) {
      alive[i] = (in[i] == 0);
    }
    vector<int> order;
    while (true) {
      vector<int> ver;
      for (int i = 0; i < n; i++) {
        if (alive[i]) {
          ver.push_back(i);
        }
      }
      if (ver.empty()) {
        break;
      }
      int x = -1;
      for (int i = 0; i < (int) ver.size(); i++) {
        bool ok = true;
        for (int j = 0; j < (int) ver.size(); j++) {
          if (i != j && !ls[ver[j]][ver[i]]) {
            ok = false;
          }
        }
        if (ok) {
          x = ver[i];
          break;
        }
      }
      assert(x != -1);
      order.push_back(x);
      alive[x] = false;         
      for (int j : g[x]) {
        in[j] -= 1;
        if (in[j] == 0) {
          alive[j] = true;
        }
      }
    }
    reverse(order.begin(), order.end());
    for (int i = 0; i < n; i++) {
      ans[order[i]] = i + 1;
    }
    for (int i = 0; i < n; i++) {
      cout << ans[i] << " ";
    }
    cout << endl;
  }
  {             
    vector<int> ans(n, -1);
    vector<int> in(n);
    for (int i = 0; i < n; i++) {
      for (int j : g[i]) {
        in[j] += 1;
      }
    }
    vector<bool> alive(n);
    for (int i = 0; i < n; i++) {
      alive[i] = (in[i] == 0);
    }
    vector<int> order;
    while (true) {
      vector<int> ver;
      for (int i = 0; i < n; i++) {
        if (alive[i]) {
          ver.push_back(i);
        }
      }
      if (ver.empty()) {
        break;
      }
      int x = -1;
      for (int i = 0; i < (int) ver.size(); i++) {
        bool ok = true;
        for (int j = 0; j < (int) ver.size(); j++) {
          if (i != j && ls[ver[j]][ver[i]]) {
            ok = false;
          }
        }
        if (ok) {
          x = ver[i];
          break;
        }
      }
      assert(x != -1);
      order.push_back(x);
      alive[x] = false;         
      for (int j : g[x]) {
        in[j] -= 1;
        if (in[j] == 0) {
          alive[j] = true;
        }
      }
    }
    reverse(order.begin(), order.end());
    for (int i = 0; i < n; i++) {
      ans[order[i]] = i + 1;
    }
    for (int i = 0; i < n; i++) {
      cout << ans[i] << " ";
    }
    cout << endl;
  }
  return 0;
}

Compilation message (stderr)

zagonetka.cpp: In function 'int main()':
zagonetka.cpp:164:25: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
  164 |       for (int p = 0; p < min(path[i].size(), path[j].size()); p++) {
      |                       ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 18
• Subtask 3: 0 / 22
• Subtask 4: 0 / 51