답안 #659818

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
659818	2022-11-19T10:19:02 Z	Sohsoh84	Newspapers (CEOI21_newspapers)	C++17	100 / 100	1 ms	468 KB

newspapers

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

#define all(x)			(x).begin(),(x).end()
#define X			first
#define Y			second
#define sep			' '
#define endl			'\n'
#define debug(x)		cerr << #x << ": " <<  x << endl;

const ll MAXN = 1e3 + 10;

int n, m, dist[MAXN], par[MAXN], D[MAXN];
vector<int> adj[MAXN], diam, ans;

void dfs(int v) {
	dist[v] = dist[par[v]] + 1;
	D[v] = 1;
	for (int u : adj[v]) {
		if (u != par[v]) {
			par[u] = v;
			dfs(u);
			D[v] = max(D[v], D[u] + 1);
		}
	}
}

inline void add(int v) {
	int m = ans.size();
	if (m >= 2 && ans[m - 1] == v && ans[m - 2] == v) {
		ans.pop_back();
		ans.pop_back();
	}
	
	ans.push_back(v);
}

inline void dojob() {
	int m = diam.size();
	diam.push_back(-1);
	int i = 0;
	for (i = 0; i < m; i++) {
		int v = diam[i];
		add(v);
		for (int u : adj[v]) {
			if (u == par[v] || u == diam[i + 1]) continue;
			if (D[u] >= 2) {
				cout << "NO" << endl;
				exit(0);
			}
			
			add(u);
			add(v);
		}
	}
}

int main() {
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
	cin >> n >> m;
	if (m >= n) return cout << "NO" << endl, 0;

	if (n == 1) return cout << "YES" << endl << 1 << endl << 1 << endl, 0;
	if (n == 2) return cout << "YES" << endl << 2 << endl << 1 << sep << 1 << endl, 0;

	for (int i = 1; i <= m; i++) {
		int u, v;
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}

	int rt = 0;
	vector<int> vec;
	for (int i = 1; i <= n; i++) {
		if (adj[i].size() == 1)
			vec.push_back(i);
		else rt = i;
	}

	for (int e : vec)
		for (int u : adj[e])
			adj[u].erase(find(all(adj[u]), e));

	dfs(rt);
	int v = max_element(dist, dist + MAXN) - dist;
	
	memset(par, 0, sizeof par);
	memset(dist, 0, sizeof dist);
	dfs(v);
	v = max_element(dist, dist + MAXN) - dist;
	
	while (v) {
		diam.push_back(v);
		v = par[v];
	}

	reverse(all(diam));
	dojob();

	int m = ans.size();
	while (m--) ans.push_back(ans[m]);

	cout << "YES" << endl << ans.size() << endl;
	for (int e : ans) cout << e << sep;
	cout << endl;
	return 0;
}

Subtask #1
12.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	0 ms	340 KB	Output is correct
15	Correct	0 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	0 ms	340 KB	Output is correct
20	Correct	0 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	0 ms	340 KB	Output is correct
23	Correct	0 ms	340 KB	Output is correct
24	Correct	0 ms	340 KB	Output is correct
25	Correct	0 ms	340 KB	Output is correct
26	Correct	0 ms	340 KB	Output is correct
27	Correct	0 ms	340 KB	Output is correct
28	Correct	0 ms	340 KB	Output is correct
29	Correct	0 ms	340 KB	Output is correct
30	Correct	0 ms	340 KB	Output is correct
31	Correct	0 ms	340 KB	Output is correct
32	Correct	0 ms	340 KB	Output is correct
33	Correct	1 ms	340 KB	Output is correct
34	Correct	0 ms	340 KB	Output is correct
35	Correct	0 ms	340 KB	Output is correct
36	Correct	1 ms	340 KB	Output is correct
37	Correct	0 ms	340 KB	Output is correct
38	Correct	1 ms	340 KB	Output is correct
39	Correct	0 ms	340 KB	Output is correct
40	Correct	0 ms	340 KB	Output is correct
41	Correct	0 ms	340 KB	Output is correct
42	Correct	1 ms	340 KB	Output is correct
43	Correct	1 ms	340 KB	Output is correct
44	Correct	0 ms	340 KB	Output is correct
45	Correct	0 ms	340 KB	Output is correct
46	Correct	0 ms	340 KB	Output is correct
47	Correct	0 ms	340 KB	Output is correct
48	Correct	1 ms	340 KB	Output is correct
49	Correct	0 ms	340 KB	Output is correct
50	Correct	0 ms	340 KB	Output is correct
51	Correct	1 ms	340 KB	Output is correct
52	Correct	0 ms	340 KB	Output is correct
53	Correct	1 ms	340 KB	Output is correct
54	Correct	0 ms	340 KB	Output is correct
55	Correct	0 ms	340 KB	Output is correct
56	Correct	0 ms	340 KB	Output is correct
57	Correct	1 ms	340 KB	Output is correct
58	Correct	0 ms	340 KB	Output is correct
59	Correct	0 ms	340 KB	Output is correct
60	Correct	1 ms	352 KB	Output is correct
61	Correct	0 ms	340 KB	Output is correct
62	Correct	1 ms	340 KB	Output is correct
63	Correct	0 ms	340 KB	Output is correct
64	Correct	0 ms	340 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	1 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	1 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	1 ms	468 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	1 ms	340 KB	Output is correct
14	Correct	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	468 KB	Output is correct
17	Correct	1 ms	468 KB	Output is correct
18	Correct	1 ms	468 KB	Output is correct
19	Correct	1 ms	468 KB	Output is correct
20	Correct	1 ms	468 KB	Output is correct

Subtask #3
80.0 / 80.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	1 ms	340 KB	Output is correct
3	Correct	1 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	0 ms	340 KB	Output is correct
6	Correct	1 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	0 ms	340 KB	Output is correct
9	Correct	0 ms	340 KB	Output is correct
10	Correct	0 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	0 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	0 ms	340 KB	Output is correct
15	Correct	0 ms	340 KB	Output is correct
16	Correct	0 ms	340 KB	Output is correct
17	Correct	0 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	0 ms	340 KB	Output is correct
20	Correct	0 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	0 ms	340 KB	Output is correct
23	Correct	0 ms	340 KB	Output is correct
24	Correct	0 ms	340 KB	Output is correct
25	Correct	0 ms	340 KB	Output is correct
26	Correct	0 ms	340 KB	Output is correct
27	Correct	0 ms	340 KB	Output is correct
28	Correct	0 ms	340 KB	Output is correct
29	Correct	0 ms	340 KB	Output is correct
30	Correct	0 ms	340 KB	Output is correct
31	Correct	0 ms	340 KB	Output is correct
32	Correct	0 ms	340 KB	Output is correct
33	Correct	1 ms	340 KB	Output is correct
34	Correct	0 ms	340 KB	Output is correct
35	Correct	0 ms	340 KB	Output is correct
36	Correct	1 ms	340 KB	Output is correct
37	Correct	0 ms	340 KB	Output is correct
38	Correct	1 ms	340 KB	Output is correct
39	Correct	0 ms	340 KB	Output is correct
40	Correct	0 ms	340 KB	Output is correct
41	Correct	0 ms	340 KB	Output is correct
42	Correct	1 ms	340 KB	Output is correct
43	Correct	1 ms	340 KB	Output is correct
44	Correct	0 ms	340 KB	Output is correct
45	Correct	0 ms	340 KB	Output is correct
46	Correct	0 ms	340 KB	Output is correct
47	Correct	0 ms	340 KB	Output is correct
48	Correct	1 ms	340 KB	Output is correct
49	Correct	0 ms	340 KB	Output is correct
50	Correct	0 ms	340 KB	Output is correct
51	Correct	1 ms	340 KB	Output is correct
52	Correct	0 ms	340 KB	Output is correct
53	Correct	1 ms	340 KB	Output is correct
54	Correct	0 ms	340 KB	Output is correct
55	Correct	0 ms	340 KB	Output is correct
56	Correct	0 ms	340 KB	Output is correct
57	Correct	1 ms	340 KB	Output is correct
58	Correct	0 ms	340 KB	Output is correct
59	Correct	0 ms	340 KB	Output is correct
60	Correct	1 ms	352 KB	Output is correct
61	Correct	0 ms	340 KB	Output is correct
62	Correct	1 ms	340 KB	Output is correct
63	Correct	0 ms	340 KB	Output is correct
64	Correct	0 ms	340 KB	Output is correct
65	Correct	0 ms	340 KB	Output is correct
66	Correct	0 ms	340 KB	Output is correct
67	Correct	0 ms	340 KB	Output is correct
68	Correct	0 ms	340 KB	Output is correct
69	Correct	0 ms	340 KB	Output is correct
70	Correct	0 ms	340 KB	Output is correct
71	Correct	0 ms	340 KB	Output is correct
72	Correct	0 ms	340 KB	Output is correct
73	Correct	0 ms	340 KB	Output is correct
74	Correct	0 ms	340 KB	Output is correct
75	Correct	0 ms	340 KB	Output is correct
76	Correct	1 ms	340 KB	Output is correct
77	Correct	1 ms	340 KB	Output is correct
78	Correct	0 ms	340 KB	Output is correct
79	Correct	1 ms	340 KB	Output is correct
80	Correct	1 ms	340 KB	Output is correct
81	Correct	1 ms	340 KB	Output is correct
82	Correct	1 ms	340 KB	Output is correct
83	Correct	1 ms	340 KB	Output is correct
84	Correct	1 ms	340 KB	Output is correct
85	Correct	1 ms	340 KB	Output is correct
86	Correct	1 ms	340 KB	Output is correct
87	Correct	1 ms	340 KB	Output is correct
88	Correct	1 ms	340 KB	Output is correct
89	Correct	1 ms	340 KB	Output is correct
90	Correct	1 ms	340 KB	Output is correct
91	Correct	1 ms	400 KB	Output is correct
92	Correct	1 ms	340 KB	Output is correct
93	Correct	1 ms	340 KB	Output is correct
94	Correct	1 ms	340 KB	Output is correct
95	Correct	1 ms	340 KB	Output is correct
96	Correct	1 ms	340 KB	Output is correct
97	Correct	1 ms	340 KB	Output is correct
98	Correct	1 ms	340 KB	Output is correct
99	Correct	1 ms	340 KB	Output is correct
100	Correct	1 ms	340 KB	Output is correct
101	Correct	1 ms	340 KB	Output is correct
102	Correct	1 ms	340 KB	Output is correct
103	Correct	1 ms	340 KB	Output is correct
104	Correct	1 ms	340 KB	Output is correct
105	Correct	1 ms	340 KB	Output is correct
106	Correct	1 ms	340 KB	Output is correct
107	Correct	1 ms	340 KB	Output is correct
108	Correct	1 ms	340 KB	Output is correct
109	Correct	1 ms	340 KB	Output is correct
110	Correct	1 ms	340 KB	Output is correct
111	Correct	1 ms	340 KB	Output is correct
112	Correct	1 ms	340 KB	Output is correct
113	Correct	1 ms	340 KB	Output is correct
114	Correct	1 ms	340 KB	Output is correct
115	Correct	1 ms	340 KB	Output is correct
116	Correct	1 ms	340 KB	Output is correct
117	Correct	1 ms	340 KB	Output is correct
118	Correct	1 ms	340 KB	Output is correct
119	Correct	1 ms	340 KB	Output is correct
120	Correct	1 ms	340 KB	Output is correct
121	Correct	1 ms	340 KB	Output is correct
122	Correct	1 ms	340 KB	Output is correct
123	Correct	1 ms	340 KB	Output is correct
124	Correct	1 ms	340 KB	Output is correct
125	Correct	1 ms	340 KB	Output is correct
126	Correct	1 ms	340 KB	Output is correct
127	Correct	1 ms	340 KB	Output is correct
128	Correct	1 ms	340 KB	Output is correct
129	Correct	1 ms	340 KB	Output is correct
130	Correct	1 ms	340 KB	Output is correct
131	Correct	1 ms	340 KB	Output is correct
132	Correct	1 ms	340 KB	Output is correct
133	Correct	1 ms	340 KB	Output is correct
134	Correct	0 ms	340 KB	Output is correct
135	Correct	1 ms	340 KB	Output is correct
136	Correct	0 ms	340 KB	Output is correct
137	Correct	0 ms	340 KB	Output is correct
138	Correct	0 ms	340 KB	Output is correct
139	Correct	0 ms	340 KB	Output is correct
140	Correct	0 ms	340 KB	Output is correct
141	Correct	1 ms	340 KB	Output is correct
142	Correct	0 ms	340 KB	Output is correct
143	Correct	0 ms	340 KB	Output is correct
144	Correct	1 ms	468 KB	Output is correct
145	Correct	1 ms	468 KB	Output is correct

답안 #659818

Compilation message

Subtask #1 12.0 / 12.0

Subtask #2 8.0 / 8.0

Subtask #3 80.0 / 80.0

Subtask #1
12.0 / 12.0

Subtask #2
8.0 / 8.0

Subtask #3
80.0 / 80.0