Submission #765272

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
765272	2023-06-24 10:06:56	Hegdahl	Joker (BOI20_joker)	C++17	39 / 100	362 ms	7728 KiB

Joker

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#include <bits/stdc++.h>
using namespace std;
struct UnionFind {
  vector<int> parent_or_neg_size, edge_parity;
  UnionFind(int n) : parent_or_neg_size(n, -1), // hver komponent har til å begynne med størrelse 1
  edge_parity(n, 0) {}
  pair<int, int> find_root_and_parity(int i) {
    int parity = 0;
    while (parent_or_neg_size[i] >= 0) {
      parity ^= edge_parity[i];
      i = parent_or_neg_size[i];
    }
    return {i, parity};
  }
  enum UniteResult { NO_CYCLE, EVEN_CYCLE, ODD_CYCLE };
  UniteResult unite(int i, int j, bool new_edge_parity = true) {
    auto [root_i, parity_i] = find_root_and_parity(i);
    auto [root_j, parity_j] = find_root_and_parity(j);
    if (root_i == root_j) {
      if (parity_i ^ parity_j ^ new_edge_parity) {
        return ODD_CYCLE;
      } else {
        return EVEN_CYCLE;
      }
    }
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 8 / 8
• Subtask 3: 25 / 25
• Subtask 4: 0 / 10
• Subtask 5: 0 / 22
• Subtask 6: 0 / 29