Submission #1261417

#	Time	Username	Problem	Language	Result	Execution time	Memory
1261417		riddles	World Map (IOI25_worldmap)	C++20	72 / 100	108 ms	9544 KiB

worldmap

#include "worldmap.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef map<ll, ll> mp;
typedef pair<ll, ll> pll;
typedef queue<ll> qi;
typedef vector<ll> vi;
typedef vector <vi> vvi;
typedef vector <pll> vpl;
typedef vector <string> vs;
#define YES cout<<"YES\n"
#define Yes cout<<"Yes\n"
#define NO cout<<"NO\n"
#define No cout<<"No\n"
#define f first
#define s second
#define pb push_back
#define all(x) begin(x), end(x)

vector<vector<int>> create_map(int N, int M, vector<int> A, vector<int> B) {
  int n, m;
  vector<int> a, b; 
  n=N;
  m=M;
  a=A;
  b=B;
  vector<vector<int>> ans;
  vector<vector<int>> con(n+1);
  vector<bool> vis(n+1);
  vector<int> etour;
  if(n==1) return {{1}};

  for(ll i=0; i<m; i++){
    //a[i]--, b[i]--;
    con[a[i]].pb(b[i]);
    con[b[i]].pb(a[i]);
  }

  auto dfs=[&](int v, auto &&dfs) -> void {
      etour.pb(v);
      vis[v]=1;
      for(auto u: con[v]) {
          if(vis[u]) continue;
          dfs(u, dfs);
          etour.pb(v);
      }
  };  
	dfs(1, dfs);
  etour.resize(2*n, 1);
  vector<bool> vis2(n+1, false);
  ans=vector<vector<int>> (4*n, vector<int>(4*n));
  int q=0;
  for(int i=0; i<2*n; i++){
    int v=etour[i];
    for(ll j=0; j<ans[q].size(); j++) ans[q][j]=v;
    q++;
    if(vis2[v]) continue;
    vis2[v]=1;
    for(ll j=0; j<ans[q].size(); j++) ans[q][j]=v;
    int h=0;
    for(auto u: con[v]) ans[q][h]=u, h+=2;
    q++;
    for(ll j=0; j<ans[q].size(); j++) ans[q][j]=v;
    q++;
  }
  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: 28 / 56