Submission #1250261

#	Time	Username	Problem	Language	Result	Execution time	Memory
1250261		jj_master	World Map (IOI25_worldmap)	C++20	58 / 100	178 ms	20024 KiB

worldmap

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

#define vi vector<int>
#define vvi vector<vector<int>>

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;
  dfs(1, vis, adj,tour);
  int K = 3*tour.size();
  vvi ans(K, vi(K, 1));
  for (int i = 0; i < K; i++) {
    for (int j = 0; j < K; j++) {
      ans[i][j] = tour[j / 3];
    }
  }

  set<int> seen;
  for (int i = 1; i < K; i += 3) {
    if (seen.count(ans[0][i])) continue;
    seen.insert(ans[0][i]);
    int el = ans[0][i];

    int cn = 0; 
    for (int j = 1; j < K; j += 2) {
      if (cn >= adj[el].size()) break;
      ans[j][i] = adj[el][cn++];
    }
  }

  return ans;
}

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 7 / 7
• Subtask 4: 8 / 8
• Subtask 5: 14 / 14
• Subtask 6: 14 / 56