Submission #1260725

#	Time	Username	Problem	Language	Result	Execution time	Memory
1260725		riddles	World Map (IOI25_worldmap)	C++20	Compilation error	0 ms	0 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)

int n, m;
vector<int> a, b;
vector<vector<int>> ans;
vector<vector<int>> con;
vector<int> etour;

/*void dfs(int u, int p) {
    etour.pb(u);
    for (int i: con[u]) {
        if (i!=p) {
            dfs(i, u);
            etour.pb(u);
        }
    }
}*/

vector<vector<int>> create_map(int N, int M, vector<int> A, vector<int> B) {
  n=N;
  m=M;
  a=A;
  b=B;
  con=vector<vector<int>> (n);

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

  vector<int> tour;
	auto dfs = [&](auto& self, int x, int pre) -> void {
		tour.push_back(x);
		for (int i : G[x]) {
			if (i != pre) {
				self(self, i, x);
				tour.push_back(x);
			}
		}
	};
	dfs(dfs, 0, -1);

  ans=vector<vector<int>> (2*n-1, vector<int>(2*n-1, 1));
  for(ll i=0; i<2*n-1; i++) for(ll j=0; j<2*n-1; j++) ans[i][j]=tour[j]+1;
  return ans;
}

Compilation message (stderr)

worldmap.cpp: In lambda function:
worldmap.cpp:53:30: error: 'G' was not declared in this scope
   53 |                 for (int i : G[x]) {
      |                              ^