| # | 제출 시각 | 아이디 | 문제 | 언어 | 결과 | 실행 시간 | 메모리 |
|---|---|---|---|---|---|---|---|
| 1349456 | bangan | 세계 지도 (IOI25_worldmap) | C++20 | 10 ms | 2116 KiB |
#include "worldmap.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
std::vector<std::vector<int>> create_map(int N, int M, std::vector<int> A, std::vector<int> B) {
vector<vector<int>> ans;
vector<vector<int>> adj(N);
for (int i=0; i<M; i++) {
A[i]--;
B[i]--;
adj[A[i]].pb(B[i]);
adj[B[i]].pb(A[i]);
}
vector<bool> seen(N);
vector<int> ord;
auto dfs = [&](auto self, int v) -> void {
seen[v] = true;
ord.pb(v);
for (int u : adj[v]) if (!seen[u]) {
self(self, u);
ord.pb(v);
}
};
dfs(dfs, 0);
assert(ord.size() == 2*N-1);
for (int i=0; i < ord.size(); i++) ord[i]++;
for (int i=0; i < ord.size(); i++) ans.pb(ord);
return ans;
}
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