Submission #238074

#	Time	Username	Problem	Language	Result	Execution time	Memory
238074		Haunted_Cpp	Matching (COCI20_matching)	C++17	5 / 110	5 ms	384 KiB

matching

#include <bits/stdc++.h>
using namespace std;


int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  map<int, vector<int> > x, y;
  for (int i = 0; i < n; i++) {
    int foo, bar;
    cin >> foo >> bar;
    x[bar].emplace_back(i + 1);
    y[foo].emplace_back(i + 1);
    assert( (int) x[bar].size() <= 2);
    assert( (int) y[foo].size() <= 2);
  }
  auto solve = [&] (const map<int, vector<int>> &where) {
    int valid = 0;
    for (auto to : where) valid += ((int)to.second.size() == 2);
    if (valid == n / 2) {
      cout << "DA\n";
      for (auto to : where) {
        cout << to.second[0] << ' ' << to.second[1] << '\n';
      }
      return true;
    }
    return false;
  };
  if (!solve(x) && !solve(y)) cout << "NE" << '\n';
  return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 6
• Subtask 3: 0 / 7
• Subtask 4: 0 / 40
• Subtask 5: 0 / 52