제출 #1150485

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1150485		The_Samurai	어르신 집배원 (BOI14_postmen)	C++20	0 / 100	1 ms	2632 KiB

postmen

// I stand with PALESTINE
 
 
 
 
// #pragma GCC optimize("Ofast,O3")
// #pragma GCC target("avx,avx2")
#include "bits/stdc++.h"
 
using namespace std;
using ll = long long;
 
const int M = 2e5 + 5, N = 1e5 + 5;
 
vector<bool> deleted(M);
vector<vector<pair<int, int>>> g(N);
vector<int> way;
 
void dfs(int u) {
    while (!g[u].empty()) {
        if (deleted[g[u].back().second]) {
            g[u].pop_back();
            continue;
        }
        deleted[g[u].back().second] = true;
        dfs(g[u].back().first);
    }
    way.emplace_back(u);
}
 
void solve() {
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < m; i++) {
        int u, v;
        cin >> u >> v;
        g[u].emplace_back(v, i);
        g[v].emplace_back(u, i);
    }
    for (int i = 1; i <= n; i++) {
        if (g[i].size() % 2) assert(false);
    }
    dfs(1);
    if (way.size() < m + 1) assert(false);
    way.pop_back();
    for (int x: way) cout << x << ' ';
}
 
int main() {
    cin.tie(0)->sync_with_stdio(false);
#ifdef sunnatov
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    int q = 1;
    // cin >> q;
    while (q--) {
        solve();
        cout << '\n';
    }
}

• Subtask 1: 0 / 38
• Subtask 2: 0 / 17
• Subtask 3: 0 / 45