Submission #674071

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
674071	2022-12-22 20:52:14	US3RN4M3	Thousands Islands (IOI22_islands)	C++17	11.90 / 100	52 ms	18188 KiB

islands

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#include"islands.h"
#include<vector>
#include<algorithm>
#include<iostream>
using namespace std;
using ll = long long;
const int mx = 200005;
vector<pair<int, int>> fwd[mx];
vector<pair<int, int>> bck[mx];
int vis[mx];
bool is_cycle[mx];
int N;
int bit;
bool toggle;
bool has_cycle(int cur) {
  vis[cur] = 1;
  for(auto [nxt, id] : fwd[cur]) {
    if(cur == 0) {
      if(toggle) {
        if((id >> bit) & 1) continue;
      } else {
        if(!((id >> bit) & 1)) continue;
      }
    }
    if(vis[nxt] == 0) {
      if(has_cycle(nxt)) return true;
    } else if(vis[nxt] == 1) {
      return true;
    }
  }
 
 
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• Subtask 1: 1.75 / 5
• Subtask 2: 1.75 / 5
• Subtask 3: 0 / 21
• Subtask 4: 8.399999999999999 / 24
• Subtask 5: 0 / 45