Submission #765947

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
765947	2023-06-25 08:03:51	Hegdahl	Joker (BOI20_joker)	C++17	100 / 100	1539 ms	12532 KiB

Joker

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#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
struct UnionFind {
  vector<int> parent_or_neg_size, edge_parity;
  struct UndoInfo {
    int i, j, j_sz;
  };
  vector<UndoInfo> undo_info;
  UnionFind(int n) : parent_or_neg_size(n, -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};
  }
  int path_compressing_find(int i) {
    if (parent_or_neg_size[i] < 0) {
      edge_parity[i] = 0;
      return i;
    }
 
 
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• Subtask 2: 8 / 8
• Subtask 3: 25 / 25
• Subtask 4: 10 / 10
• Subtask 5: 22 / 22
• Subtask 6: 29 / 29