Submission #814573

#	Time	Username	Problem	Language	Result	Execution time	Memory
814573		LIF	Thousands Islands (IOI22_islands)	C++17	Compilation error	0 ms	0 KiB

islands

#include "islands.h"
#include<bits/stdc++.h>
#include <variant>
#include <vector>
int ind[300005];
int ph[1005][1005];
vector<int> vv[300005];
using namespace std;
bool can[300005];
void dfs(int now,int fa)
{
  can[now] = true;
  for(int i=0;i<vv[now].size();i++)
  {
    int go = vv[now][i];
    if(go != fa)dfs(go,now);
  }
}
std::variant<bool, std::vector<int>> find_journey(
    int N, int M, std::vector<int> U, std::vector<int> V) {
  for(int i=0;i<M;i++)
  {
    vv[U[i]].push_back(V[i]);
    vv[V[i]].push_back(U[i]);
    ind[U[i]]++;
    ind[V[i]]++;
  }
  dfs(0);
  if(ind[0] >= 2)return true;
  for(int i=1;i<N;i++)
  {
     if(ind[i] >= 3 && can[go] == true)return true; 
  } 
 	/*
  if (N == 4) {
    return std::vector<int>({0, 1, 2, 4, 0, 3, 2, 1, 4, 3});
  }
  return false;*/
  return true;
}

Compilation message (stderr)

islands.cpp:7:1: error: 'vector' does not name a type
    7 | vector<int> vv[300005];
      | ^~~~~~
islands.cpp: In function 'void dfs(int, int)':
islands.cpp:13:17: error: 'vv' was not declared in this scope
   13 |   for(int i=0;i<vv[now].size();i++)
      |                 ^~
islands.cpp: In function 'std::variant<bool, std::vector<int, std::allocator<int> > > find_journey(int, int, std::vector<int>, std::vector<int>)':
islands.cpp:23:5: error: 'vv' was not declared in this scope
   23 |     vv[U[i]].push_back(V[i]);
      |     ^~
islands.cpp:28:8: error: too few arguments to function 'void dfs(int, int)'
   28 |   dfs(0);
      |        ^
islands.cpp:10:6: note: declared here
   10 | void dfs(int now,int fa)
      |      ^~~
islands.cpp:32:28: error: 'go' was not declared in this scope
   32 |      if(ind[i] >= 3 && can[go] == true)return true;
      |                            ^~