Submission #1074500

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1074500	2024-08-25 10:50:29	fv3	Thousands Islands (IOI22_islands)	C++17	24 / 100	90 ms	8732 KiB

islands

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#include "islands.h"
#include <bits/stdc++.h>
using namespace std;
vector<vector<pair<int, int>>> adj;
vector<int> visited;
bool ok;
vector<int> find_cycle(int s, set<int>&path)
{
  bool skip = false;
  vector<int> cycle;
  int i = s;
  do
  {
    for (auto node : adj[i])
    {
      if (!path.count(node.first)) continue;
      cycle.push_back(node.second);
      i = node.first;
      break;
    }
  }
  while (i != s);
  const int sz = cycle.size();
  for (int i = 0; i < sz; i++)
    cycle.push_back(cycle[i] ^ 1);
  for (int i = 2 * sz - 1 ; i >= 0; i--)
    cycle.push_back(cycle[i] ^ 1);
 
 
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Compilation message (stderr)

islands.cpp: In function 'std::vector<int> find_cycle(int, std::set<int>&)':
islands.cpp:11:8: warning: unused variable 'skip' [-Wunused-variable]
   11 |   bool skip = false;
      |        ^~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 21
• Subtask 4: 24 / 24
• Subtask 5: 0 / 45