답안 #624669

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
624669	2022-08-08T15:13:05 Z	iomoon191	Newspapers (CEOI21_newspapers)	C++17	54 / 100	5 ms	5096 KB

newspapers

#include <bits/stdc++.h>
using ll = long long;
#define int ll
using namespace std;

#define sz(x) (int)(x).size()
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, l, r) for(int i = l; i >= r; i--)
#define fi first
#define se second
#define mod 998244353

#define db(x) cerr << __LINE__ << " " << #x << " " << x << "\n"
using vi = vector<int>;
using pi = pair<int, int>;

const ll N = 200005;
const ll inf = 1e18;

int n, m, par[N];
vi adj[N];
bool ok[N], used[N];

pi dfs(int u, int p = -1){
	pi res(-inf, u);
	for(auto &i : adj[u]){
		if(i == p) continue;
		par[i] = u;
		pi j = dfs(i, u);
		j.fi ++;
		res = max(res, j);
	}
	return res;
}

void solve(){
	cin >> n >> m;
	if(n == 1){
		cout << "YES\n1\n1";
		return;
	}
	if(n == 2){
		cout << "YES\n2\n1 1";
		return;
	}
	if(m != n - 1){
		cout << "NO";
		return;
	}
	foru(i, 1, m){
		int u, v; 
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	int x = dfs(1).se;
	int y = dfs(x).se;
	for(int i = y; ; i = par[i]){
		ok[i] = true;
		used[i] = true;
		for(auto &j : adj[i]){
			ok[j] = true;
			for(auto &k : adj[j]){
				ok[k] = true;
			}
		}
		if(i == x) break;
 	}
 	if(count(ok + 1, ok + n + 1, 0)){
 		cout << "NO";
 		return;
 	}
 	vi res;
 	for(int i = par[y]; i != x; i = par[i]){
 		res.push_back(i);
 		for(auto &j : adj[i]){
 			if(used[i] or sz(adj[i]) == 1){
 				continue;
 			}
 			res.push_back(j);
 			res.push_back(i);
 		}
 	}
 	cout << "YES\n" << (sz(res) << 1) << "\n";
 	foru(i, 0, sz(res) - 1) cout << res[i] << " ";
 	ford(i, sz(res) - 1, 0) cout << res[i] << " ";
}

signed main(){
	ios_base::sync_with_stdio(0); cin.tie(0);
	int t = 1; 
	while(t--){
		solve();
	}
}

Subtask #1
6.0 / 12.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4948 KB	Output is correct
2	Correct	4 ms	4948 KB	Output is correct
3	Correct	2 ms	4948 KB	Output is correct
4	Correct	3 ms	5032 KB	Output is correct
5	Correct	3 ms	5028 KB	Output is correct
6	Correct	3 ms	5032 KB	Output is correct
7	Correct	3 ms	4948 KB	Output is correct
8	Partially correct	3 ms	4960 KB	Failed to provide a successful strategy.
9	Correct	3 ms	4948 KB	Output is correct
10	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
11	Correct	3 ms	4948 KB	Output is correct
12	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
13	Correct	2 ms	4948 KB	Output is correct
14	Correct	3 ms	4948 KB	Output is correct
15	Correct	3 ms	4948 KB	Output is correct
16	Correct	3 ms	4948 KB	Output is correct
17	Correct	3 ms	4948 KB	Output is correct
18	Correct	3 ms	5028 KB	Output is correct
19	Correct	3 ms	5024 KB	Output is correct
20	Correct	3 ms	5032 KB	Output is correct
21	Correct	3 ms	4948 KB	Output is correct
22	Correct	3 ms	4948 KB	Output is correct
23	Partially correct	3 ms	5024 KB	Failed to provide a successful strategy.
24	Correct	3 ms	4948 KB	Output is correct
25	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
26	Partially correct	4 ms	4948 KB	Failed to provide a successful strategy.
27	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
28	Correct	2 ms	5024 KB	Output is correct
29	Correct	2 ms	4948 KB	Output is correct
30	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
31	Correct	3 ms	4948 KB	Output is correct
32	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
33	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
34	Correct	3 ms	4992 KB	Output is correct
35	Partially correct	3 ms	5032 KB	Failed to provide a successful strategy.
36	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
37	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
38	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
39	Partially correct	3 ms	5032 KB	Failed to provide a successful strategy.
40	Partially correct	3 ms	5024 KB	Failed to provide a successful strategy.
41	Partially correct	2 ms	4948 KB	Failed to provide a successful strategy.
42	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
43	Partially correct	3 ms	5024 KB	Failed to provide a successful strategy.
44	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
45	Correct	2 ms	4948 KB	Output is correct
46	Correct	2 ms	4948 KB	Output is correct
47	Correct	3 ms	4948 KB	Output is correct
48	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
49	Correct	3 ms	4948 KB	Output is correct
50	Correct	3 ms	4948 KB	Output is correct
51	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
52	Correct	3 ms	4948 KB	Output is correct
53	Correct	3 ms	4948 KB	Output is correct
54	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
55	Correct	3 ms	4948 KB	Output is correct
56	Correct	3 ms	5096 KB	Output is correct
57	Correct	3 ms	5028 KB	Output is correct
58	Correct	3 ms	4948 KB	Output is correct
59	Correct	3 ms	4948 KB	Output is correct
60	Correct	3 ms	5028 KB	Output is correct
61	Correct	3 ms	4948 KB	Output is correct
62	Correct	3 ms	4948 KB	Output is correct
63	Correct	3 ms	4948 KB	Output is correct
64	Correct	4 ms	5032 KB	Output is correct

Subtask #2
8.0 / 8.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4948 KB	Output is correct
2	Correct	4 ms	4948 KB	Output is correct
3	Correct	3 ms	4948 KB	Output is correct
4	Correct	3 ms	4948 KB	Output is correct
5	Correct	3 ms	4948 KB	Output is correct
6	Correct	3 ms	4948 KB	Output is correct
7	Correct	3 ms	4948 KB	Output is correct
8	Correct	2 ms	4948 KB	Output is correct
9	Correct	3 ms	4948 KB	Output is correct
10	Correct	2 ms	4948 KB	Output is correct
11	Correct	3 ms	5076 KB	Output is correct
12	Correct	3 ms	5076 KB	Output is correct
13	Correct	3 ms	5020 KB	Output is correct
14	Correct	3 ms	5076 KB	Output is correct
15	Correct	3 ms	5076 KB	Output is correct
16	Correct	3 ms	5076 KB	Output is correct
17	Correct	4 ms	5076 KB	Output is correct
18	Correct	3 ms	5076 KB	Output is correct
19	Correct	3 ms	5076 KB	Output is correct
20	Correct	3 ms	5076 KB	Output is correct

Subtask #3
40.0 / 80.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	4948 KB	Output is correct
2	Correct	4 ms	4948 KB	Output is correct
3	Correct	2 ms	4948 KB	Output is correct
4	Correct	3 ms	5032 KB	Output is correct
5	Correct	3 ms	5028 KB	Output is correct
6	Correct	3 ms	5032 KB	Output is correct
7	Correct	3 ms	4948 KB	Output is correct
8	Partially correct	3 ms	4960 KB	Failed to provide a successful strategy.
9	Correct	3 ms	4948 KB	Output is correct
10	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
11	Correct	3 ms	4948 KB	Output is correct
12	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
13	Correct	2 ms	4948 KB	Output is correct
14	Correct	3 ms	4948 KB	Output is correct
15	Correct	3 ms	4948 KB	Output is correct
16	Correct	3 ms	4948 KB	Output is correct
17	Correct	3 ms	4948 KB	Output is correct
18	Correct	3 ms	5028 KB	Output is correct
19	Correct	3 ms	5024 KB	Output is correct
20	Correct	3 ms	5032 KB	Output is correct
21	Correct	3 ms	4948 KB	Output is correct
22	Correct	3 ms	4948 KB	Output is correct
23	Partially correct	3 ms	5024 KB	Failed to provide a successful strategy.
24	Correct	3 ms	4948 KB	Output is correct
25	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
26	Partially correct	4 ms	4948 KB	Failed to provide a successful strategy.
27	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
28	Correct	2 ms	5024 KB	Output is correct
29	Correct	2 ms	4948 KB	Output is correct
30	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
31	Correct	3 ms	4948 KB	Output is correct
32	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
33	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
34	Correct	3 ms	4992 KB	Output is correct
35	Partially correct	3 ms	5032 KB	Failed to provide a successful strategy.
36	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
37	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
38	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
39	Partially correct	3 ms	5032 KB	Failed to provide a successful strategy.
40	Partially correct	3 ms	5024 KB	Failed to provide a successful strategy.
41	Partially correct	2 ms	4948 KB	Failed to provide a successful strategy.
42	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
43	Partially correct	3 ms	5024 KB	Failed to provide a successful strategy.
44	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
45	Correct	2 ms	4948 KB	Output is correct
46	Correct	2 ms	4948 KB	Output is correct
47	Correct	3 ms	4948 KB	Output is correct
48	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
49	Correct	3 ms	4948 KB	Output is correct
50	Correct	3 ms	4948 KB	Output is correct
51	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
52	Correct	3 ms	4948 KB	Output is correct
53	Correct	3 ms	4948 KB	Output is correct
54	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
55	Correct	3 ms	4948 KB	Output is correct
56	Correct	3 ms	5096 KB	Output is correct
57	Correct	3 ms	5028 KB	Output is correct
58	Correct	3 ms	4948 KB	Output is correct
59	Correct	3 ms	4948 KB	Output is correct
60	Correct	3 ms	5028 KB	Output is correct
61	Correct	3 ms	4948 KB	Output is correct
62	Correct	3 ms	4948 KB	Output is correct
63	Correct	3 ms	4948 KB	Output is correct
64	Correct	4 ms	5032 KB	Output is correct
65	Correct	3 ms	4948 KB	Output is correct
66	Correct	3 ms	4948 KB	Output is correct
67	Correct	3 ms	5028 KB	Output is correct
68	Correct	2 ms	4948 KB	Output is correct
69	Correct	3 ms	5004 KB	Output is correct
70	Correct	3 ms	5028 KB	Output is correct
71	Correct	3 ms	4948 KB	Output is correct
72	Partially correct	3 ms	5024 KB	Failed to provide a successful strategy.
73	Correct	2 ms	4948 KB	Output is correct
74	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
75	Correct	3 ms	4948 KB	Output is correct
76	Partially correct	3 ms	4948 KB	Failed to provide a successful strategy.
77	Correct	3 ms	4948 KB	Output is correct
78	Correct	3 ms	4948 KB	Output is correct
79	Correct	3 ms	4948 KB	Output is correct
80	Correct	3 ms	5076 KB	Output is correct
81	Correct	4 ms	5076 KB	Output is correct
82	Correct	5 ms	5076 KB	Output is correct
83	Correct	3 ms	5036 KB	Output is correct
84	Correct	3 ms	5076 KB	Output is correct
85	Correct	3 ms	5076 KB	Output is correct
86	Correct	3 ms	5076 KB	Output is correct
87	Correct	3 ms	5076 KB	Output is correct
88	Correct	3 ms	5076 KB	Output is correct
89	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
90	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
91	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
92	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
93	Partially correct	4 ms	5076 KB	Failed to provide a successful strategy.
94	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
95	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
96	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
97	Partially correct	3 ms	5032 KB	Failed to provide a successful strategy.
98	Partially correct	3 ms	5060 KB	Failed to provide a successful strategy.
99	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
100	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
101	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
102	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
103	Partially correct	3 ms	5032 KB	Failed to provide a successful strategy.
104	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
105	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
106	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
107	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
108	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
109	Partially correct	4 ms	5092 KB	Failed to provide a successful strategy.
110	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
111	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
112	Partially correct	3 ms	5036 KB	Failed to provide a successful strategy.
113	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
114	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
115	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
116	Partially correct	4 ms	5076 KB	Failed to provide a successful strategy.
117	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
118	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
119	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
120	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
121	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
122	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
123	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
124	Partially correct	3 ms	5036 KB	Failed to provide a successful strategy.
125	Partially correct	3 ms	5028 KB	Failed to provide a successful strategy.
126	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
127	Partially correct	3 ms	5076 KB	Failed to provide a successful strategy.
128	Partially correct	4 ms	5076 KB	Failed to provide a successful strategy.
129	Correct	4 ms	5076 KB	Output is correct
130	Correct	3 ms	5076 KB	Output is correct
131	Correct	4 ms	5076 KB	Output is correct
132	Correct	3 ms	5032 KB	Output is correct
133	Correct	3 ms	5028 KB	Output is correct
134	Correct	3 ms	5076 KB	Output is correct
135	Correct	3 ms	5076 KB	Output is correct
136	Correct	3 ms	5076 KB	Output is correct
137	Correct	3 ms	5040 KB	Output is correct
138	Correct	3 ms	5076 KB	Output is correct
139	Correct	3 ms	5040 KB	Output is correct
140	Correct	3 ms	4948 KB	Output is correct
141	Correct	3 ms	5076 KB	Output is correct
142	Correct	3 ms	5076 KB	Output is correct
143	Correct	2 ms	5076 KB	Output is correct
144	Correct	3 ms	5076 KB	Output is correct
145	Correct	3 ms	5076 KB	Output is correct

답안 #624669

Compilation message

Subtask #1 6.0 / 12.0

Subtask #2 8.0 / 8.0

Subtask #3 40.0 / 80.0

Subtask #1
6.0 / 12.0

Subtask #2
8.0 / 8.0

Subtask #3
40.0 / 80.0