Submission #1067617

#	Time	Username	Problem	Language	Result	Execution time	Memory
1067617		MilosMilutinovic	Make them Meet (EGOI24_makethemmeet)	C++14	14.08 / 100	52 ms	3152 KiB

Main

#include <bits/stdc++.h>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  vector<vector<int>> g(n);
  for (int i = 0; i < m; i++) {
    int u, v;
    cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  auto Subtask1 = [&]() {
    return m == n - 1 && (int) g[0].size() == n - 1;
  };
  auto Subtask2 = [&]() {
    return m == n * (n - 1) / 2;
  };
  auto Subtask3 = [&]() {
    bool ok = (m == n - 1);
    for (int i = 0; i < n; i++) {
      for (int j : g[i]) {
        if (abs(i - j) > 1) {
          ok = false;
        }
      }
    }
    return ok;
  };
  if (Subtask1()) {
    // Subtask 1
    cout << 2 * (n - 1) + 1 << '\n';
    for (int i = 0; i < n; i++) {
      cout << 1 << " ";
    }
    cout << '\n';
    for (int i = 1; i < n; i++) {
      for (int j = 0; j < n; j++) {
        if (j == 0 || j == i) {
          cout << 1 << " ";
        } else {
          cout << 2 << " ";
        }
      }
      cout << '\n';
      for (int j = 0; j < n; j++) {
        if (j == 0 || j == i) {
          cout << 1 << " ";
        } else {
          cout << 2 << " ";
        }
      }
      cout << '\n';
    }
    return 0;
  }
  if (Subtask3()) {
    cout << (n - 1) * (n - 1) << '\n';
    for (int i = 0; i + 1 < n; i++) {
      for (int j = 0; j + 1 < n; j++) {
        int col = 2;
        for (int k = 0; k < n; k++) {
          if (k == j || k == j + 1) {
            cout << 1 << " ";
          } else {
            cout << col << " ";
            col += 1;
          }
        }
        cout << '\n';
      }
    }
    return 0;
  }
  return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:20:8: warning: variable 'Subtask2' set but not used [-Wunused-but-set-variable]
   20 |   auto Subtask2 = [&]() {
      |        ^~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 13
• Subtask 3: 4.0801811808999995 / 11
• Subtask 4: 0 / 36
• Subtask 5: 0 / 30