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Submission #238074

# Submission time Handle Problem Language Result Execution time Memory
238074 2020-06-09T21:44:30 Z Haunted_Cpp Matching (COCI20_matching) C++17
5 / 110
 5 ms 384 KB 
#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
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct

Subtask #2
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Incorrect 5 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Incorrect 5 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Incorrect 5 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #5
0 / 52.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Incorrect 5 ms 384 KB Output isn't correct
6 Halted 0 ms 0 KB -