Submission #1007179

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1007179	2024-06-24 12:50:00	BuzzyBeez	Joker (BOI20_joker)	C++17	100 / 100	202 ms	26308 KiB

Joker

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#pragma GCC optimize("O3,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
pair<int, int> E[200008];
int best[200008];
struct Disjoint_Set_Union {
  static const int N = 2e5;
  int par[N + 8], dis[N + 8], sz[N + 8];
  vector<pair<int*, int>> history; int is_bi = 1;
  Disjoint_Set_Union() {
    iota(par, par + N + 8, 0);
    fill(dis, dis + N + 8, 0);
    fill(sz, sz + N + 8, 1);
  }
  pair<int, int> pu, pv; int du, dv;
  pair<int, int> find(int u) {
    du = 0;
    while (par[u] != u) du ^= dis[u], u = par[u];
    return {u, du};
  }
  void join(int u, int v) {
    pu = find(u); pv = find(v);
    u = pu.first; du = pu.second; v = pv.first; dv = pv.second;
    if (u == v) {
      if (du == dv) history.push_back({&is_bi, is_bi}), is_bi = 0;
      return;
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Compilation message (stderr)

Joker.cpp: In member function 'void Disjoint_Set_Union::rollback_to(int)':
Joker.cpp:40:25: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int*, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   40 |   while (history.size() > snapshot) {
      |          ~~~~~~~~~~~~~~~^~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 8 / 8
• Subtask 3: 25 / 25
• Subtask 4: 10 / 10
• Subtask 5: 22 / 22
• Subtask 6: 29 / 29