제출 #1302504

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1302504		aaaaaaaa	World Map (IOI25_worldmap)	C++20	컴파일 에러	0 ms	0 KiB

worldmap

#include "worldmap.h"
#include <bits/stdc++.h>
using namespace std;

const int mxN = 42;

vector<pair<int, int>> ord;
vector<int> adj[mxN];
bool vis[mxN];

void dfs(int u, int par){
    if(par > 0) ord.push_back({u, par});
    vis[u] = 1;
    for(auto it : adj[u]){
        if(it ^ par){
            if(!vis[it]){
                dfs(it, u);
            }
        }
    }
    if(par > 0) ord.push_back({par, u});
}

vector<vector<int>> create_map(int N, int M, vector<int> A, vector<int> B) {

  for(int i = 0; i < M; ++i){
    adj[A[i]].push_back(B[i]);
    adj[B[i]].push_back(A[i]);
  }

  dfs(1, 0);


  vector<vector<int>> demo(max(1, (int) ord.size()), vector<int>(max(1, (int) ord.size()), 1));
  vector<vector<int>> ans;

  for(int i = 0; i < ord.size(); ++i){
    demo[i][0] = ord[i].first;
    demo[i][1] = ord[i].second;
    for(int j = 2; j < ord.size(); ++j) demo[i][j] = demo[i][0];
  }


  for(int i = 0; i < (int) demo.size(); ++i){
    ans.push_back(demo[i]);
    vector<int> layer((int) demo.size());
    int sz = 0;
    for(int j = 0; j < (int) demo.size(); ++j){
        if(j == 1 || sz >= adj[demo[i][0]].size()){
            layer[j] = demo[i][0];
        }else{
            layer[j] = adj[demo[i][0]][sz++];
        }
    }
    ans.push_back(layer);
    ans.push_back(demo[i]);
  }


  for(int i = 1; i <= N; ++i) adj[i].clear(), vis[i] = 0;
  ord.clear();

  for(int i = 0; i < ans.size(); ++i){
    while(ans[i].size() < ans.size()){
        ans[i].push_back(ans[i].back());
    }
  }

  return dummy;
}

컴파일 시 표준 에러 (stderr) 메시지

worldmap.cpp: In function 'std::vector<std::vector<int> > create_map(int, int, std::vector<int>, std::vector<int>)':
worldmap.cpp:69:10: error: 'dummy' was not declared in this scope
   69 |   return dummy;
      |          ^~~~~