제출 #783360

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
783360		vh50	Newspapers (CEOI21_newspapers)	C++17	4 / 100	1 ms	340 KiB

newspapers

#include <bits/stdc++.h>
#define int long long
#define endl "\n"
using namespace std;
const int MAXN = 2e3;
int n, m, marc[MAXN][MAXN];
vector <int> g[MAXN];
void dfs(int a, int r)
{
	marc[a][r] = 1;
	for(auto v : g[a])
	{
		if(marc[v][r])	continue;
		dfs(v, r);
	}
}
main()
{
	cin >> n >> m;
	for(int i = 0; i < m; i++)	
	{
		int a, b;
		cin >> a >> b;
		a--, b--;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	if(m == n - 1)
	{
		cout << "YES" << endl;
		cout << 4 * n << endl; 
		for(int i = 0; i < n; i++) 	cout << i + 1 << " " << i + 1 << " ";
		for(int i = 0; i < n; i++) 	cout << i + 1 << " " << i + 1 << " ";
		cout << endl;
	}
	else cout << "NO" << endl;
}

컴파일 시 표준 에러 (stderr) 메시지

newspapers.cpp:17:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   17 | main()
      | ^~~~

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