제출 #1252903

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1252903		madamadam3	World Map (IOI25_worldmap)	C++20	컴파일 에러	0 ms	0 KiB

worldmap

#include "worldmap.h"
#include <bits/stdc++.h>

using namespace std;

#define int long long int
using vi = vector<int>;
using vvi = vector<vi>;

void dfs(int u, vector<bool> &vis, vvi &adj, vi &tour) {
  vis[u] = true;
  tour.push_back(u);
  
  for (int v : adj[u]) {
    if (vis[v]) continue;
    dfs(v, vis, adj, tour);
    tour.push_back(u);
  }
}

vvi create_map(int n, int m, vi a, vi b) {
  vvi adj(n+1, vi()); for (int i = 0; i < m; i++) adj[a[i]].push_back(b[i]), adj[b[i]].push_back(a[i]);
  
  vector<bool> vis(n+1, false); vi tour; set<int> seen;
  dfs(1, vis, adj,tour);

  vvi ans(1); vector<int> ridx(n+1);
  for (int i = 0; i < tour.size(); i++) {
    if (!seen.count(tour[i])) {
      ans[0].push_back(tour[i]); 
      ridx[tour[i]] = ans[0].size();
      ans[0].push_back(tour[i]);
    }
    ans[0].push_back(tour[i]);
    seen.insert(tour[i]);
  }

  int K = ans[0].size();
  for (int i = 1; i < K; i++) {
    ans.push_back(vi(K));
    for (int j = 0; j < K; j++) {
      ans[i][j] = ans[i-1][j];
    }
  }

  for (int i = 1; i <= n; i++) {
    int r = ridx[i];
    int cc = 0;
    for (auto &el : adj[i]) {
      if (el <= i) continue;
      ans[cc][r] = el;
      cc += 2;
    }
  }
  return ans;
}

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/cc1HpkAa.o: in function `main':
grader.cpp:(.text.startup+0x635): undefined reference to `create_map(int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status