제출 #999205

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
999205		crafticat	Newspapers (CEOI21_newspapers)	C++17	4 / 100	1 ms	856 KiB

newspapers

#include <bits/stdc++.h>

using namespace std;
vector<vector<int>> g;
int MAX_DEP = 0;

vector<int> ans;

void dfs(int x, int p) {
    ans.push_back(x);
    for (auto child : g[x]) {
        if (child == p) continue;
        ans.push_back(child);
        dfs(child,x);
    }
    ans.push_back(x);
}

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr);

    int n, m; cin >> n >> m;

    g.resize(n + 1);
    for (int i = 0; i < m; ++i) {
        int a, b; cin >> a >> b;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    if (m != n -1) {
        cout << "NO\n";
        return 0;
    }


    dfs(1,0);
    cout << "YES\n";
    cout << ans.size() << "\n";
    if (ans.size() > 5 * n) exit(5);
    for (int an : ans) {
        cout << an << " ";
    }

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

newspapers.cpp: In function 'int main()':
newspapers.cpp:39:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   39 |     if (ans.size() > 5 * n) exit(5);
      |         ~~~~~~~~~~~^~~~~~~

• Subtask 1: 0 / 12
• Subtask 2: 4 / 8
• Subtask 3: 0 / 80