Submission #1265787

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265787		thenpc	World Map (IOI25_worldmap)	C++20	Compilation error	0 ms	0 KiB

worldmap

#include <bits/stdc++.h>
#include "worldmap.h"
using namespace std;
#define ll long long
int visited[50];
vector<int> path;
void dfs(int u) {
    visited[u] = 1;
    path.push_back(u); 
    for (int v : adj[u]) {
        if (!visited[v]) {
            dfs(v);
            path.push_back(u); 
        }
    }
}
vector<vector<int>> create_map(int n,int m,vector<int> a,vector<int> b){
  path.clear();
  vector<vector<int>> v;
  vector<int> u,adj[50];
  for(int i=0;i<m;i++){
    adj[a[i]].push_back(b[i]);
    adj[b[i]].push_back(a[i]);
    
  }
  
  for(int i=1;i<=n;i++){
    visited[i]=0;
  }
  dfs(1);
  for(int i=0;i<path.size();i++){
    for(int j=1;j<=path.size()*3;j++){
      u.push_back(path[i]);
    }
    v.push_back(u);
    u.clear();
    for(int j=0;j<adj[path[i]].size();j++){
      u.push_back(path[i]);
      u.push_back(adj[path[i]][j]);
    }
    for(int j=2*adj[path[i]].size()+1;j<=path.size()*3;j++){
      u.push_back(path[i]);
    }
    v.push_back(u);
    u.clear();
    for(int j=1;j<=path.size()*3;j++){
      u.push_back(path[i]);
    }
    v.push_back(u);
    u.clear();
  }
  return v;
}

Compilation message (stderr)

worldmap.cpp: In function 'void dfs(int)':
worldmap.cpp:10:18: error: 'adj' was not declared in this scope
   10 |     for (int v : adj[u]) {
      |                  ^~~