Submission #919000

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
919000	2024-01-31T03:04:55 Z	NK_	Newspapers (CEOI21_newspapers)	C++17	100 / 100	50 ms	8344 KB

newspapers

// Success consists of going from failure to failure without loss of enthusiasm
#include <bits/stdc++.h>

using namespace std;

#define nl '\n'
#define pb push_back
#define sz(x) int(x.size())

template<class T> using V = vector<T>;
using vi = V<int>;

const int INF = 1e9 + 10;

int main() {
	cin.tie(0)->sync_with_stdio(0);
	
	int N, M; cin >> N >> M;

	V<vi> adj(N);
	for(int i = 0; i < M; i++) {
		int u, v; cin >> u >> v; --u, --v;
		adj[u].pb(v);
		adj[v].pb(u);
	}

	if (M != N - 1) {
		cout << "NO" << nl;
		exit(0-0);
	}

	if (N == 1) {
		cout << "YES" << nl;
		cout << 1 << nl;
		cout << 1 << nl;
		exit(0-0);
	}

	if (N == 2) {
		cout << "YES" << nl;
		cout << 2 << nl;
		cout << 1 << " " << 1 << nl;
		exit(0-0);
	}

	vi D(N, -1), par(N);
	auto bfs = [&]() {
		vi q; for(int i = 0; i < N; i++) if (D[i] == 0) q.pb(i);

		for(int i = 0; i < sz(q); i++) {
			int u = q[i];

			for(auto& v : adj[u]) if (D[v] == -1) {
				D[v] = D[u] + 1; par[v] = u;
				q.pb(v);
			}
		}
	};

	D = vi(N, -1); D[0] = 0; bfs();
	int s = max_element(begin(D), end(D)) - begin(D);
	D = vi(N, -1); D[s] = 0; bfs();
	int t = max_element(begin(D), end(D)) - begin(D);
	D = vi(N, -1); D[t] = 0; bfs();

	vi path;
	for(int u = par[s]; u != t; u = par[u]) path.pb(u);

	D = vi(N, -1); for(auto& u : path) D[u] = 0;
	bfs();

	if (*max_element(begin(D), end(D)) > 2) {
		cout << "NO" << nl;
		exit(0-0);
	}

	vi ans;
	for(int i = 0; i < sz(path); i++) {
		int u = path[i];
		ans.pb(u);
		for(auto& v : adj[u]) if (D[v] && sz(adj[v]) > 1) {
			ans.pb(v); ans.pb(u);
		}
	}

	cout << "YES" << nl;
	cout << 2 * sz(ans) << nl;
	for(auto& x : ans) cout << x + 1 << " ";
	reverse(begin(ans), end(ans));
	for(auto& x : ans) cout << x + 1 << " ";
	cout << nl;

	exit(0-0);
}

Subtask #1
12.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	344 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	344 KB	Output is correct
12	Correct	0 ms	344 KB	Output is correct
13	Correct	1 ms	344 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	344 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	0 ms	344 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Correct	0 ms	344 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	344 KB	Output is correct
22	Correct	0 ms	344 KB	Output is correct
23	Correct	0 ms	344 KB	Output is correct
24	Correct	1 ms	600 KB	Output is correct
25	Correct	1 ms	344 KB	Output is correct
26	Correct	0 ms	344 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	0 ms	348 KB	Output is correct
29	Correct	1 ms	344 KB	Output is correct
30	Correct	1 ms	344 KB	Output is correct
31	Correct	0 ms	348 KB	Output is correct
32	Correct	0 ms	348 KB	Output is correct
33	Correct	1 ms	344 KB	Output is correct
34	Correct	1 ms	344 KB	Output is correct
35	Correct	0 ms	344 KB	Output is correct
36	Correct	1 ms	348 KB	Output is correct
37	Correct	1 ms	344 KB	Output is correct
38	Correct	0 ms	344 KB	Output is correct
39	Correct	0 ms	344 KB	Output is correct
40	Correct	0 ms	348 KB	Output is correct
41	Correct	1 ms	344 KB	Output is correct
42	Correct	1 ms	548 KB	Output is correct
43	Correct	0 ms	344 KB	Output is correct
44	Correct	0 ms	344 KB	Output is correct
45	Correct	1 ms	344 KB	Output is correct
46	Correct	1 ms	344 KB	Output is correct
47	Correct	0 ms	344 KB	Output is correct
48	Correct	0 ms	348 KB	Output is correct
49	Correct	1 ms	344 KB	Output is correct
50	Correct	0 ms	344 KB	Output is correct
51	Correct	0 ms	344 KB	Output is correct
52	Correct	0 ms	344 KB	Output is correct
53	Correct	0 ms	344 KB	Output is correct
54	Correct	0 ms	344 KB	Output is correct
55	Correct	0 ms	344 KB	Output is correct
56	Correct	0 ms	344 KB	Output is correct
57	Correct	0 ms	344 KB	Output is correct
58	Correct	0 ms	344 KB	Output is correct
59	Correct	0 ms	348 KB	Output is correct
60	Correct	0 ms	344 KB	Output is correct
61	Correct	1 ms	344 KB	Output is correct
62	Correct	0 ms	348 KB	Output is correct
63	Correct	0 ms	348 KB	Output is correct
64	Correct	0 ms	344 KB	Output is correct

Subtask #2
8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	344 KB	Output is correct
3	Correct	0 ms	344 KB	Output is correct
4	Correct	1 ms	548 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	344 KB	Output is correct
7	Correct	1 ms	600 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	0 ms	348 KB	Output is correct
11	Correct	1 ms	344 KB	Output is correct
12	Correct	1 ms	344 KB	Output is correct
13	Correct	1 ms	344 KB	Output is correct
14	Correct	1 ms	344 KB	Output is correct
15	Correct	1 ms	344 KB	Output is correct
16	Correct	1 ms	344 KB	Output is correct
17	Correct	1 ms	344 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	344 KB	Output is correct
20	Correct	1 ms	344 KB	Output is correct

Subtask #3
80.0 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	344 KB	Output is correct
3	Correct	0 ms	348 KB	Output is correct
4	Correct	0 ms	344 KB	Output is correct
5	Correct	1 ms	344 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	0 ms	344 KB	Output is correct
8	Correct	0 ms	344 KB	Output is correct
9	Correct	0 ms	344 KB	Output is correct
10	Correct	1 ms	344 KB	Output is correct
11	Correct	0 ms	344 KB	Output is correct
12	Correct	0 ms	344 KB	Output is correct
13	Correct	1 ms	344 KB	Output is correct
14	Correct	0 ms	348 KB	Output is correct
15	Correct	0 ms	344 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	0 ms	344 KB	Output is correct
18	Correct	1 ms	344 KB	Output is correct
19	Correct	0 ms	344 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	1 ms	344 KB	Output is correct
22	Correct	0 ms	344 KB	Output is correct
23	Correct	0 ms	344 KB	Output is correct
24	Correct	1 ms	600 KB	Output is correct
25	Correct	1 ms	344 KB	Output is correct
26	Correct	0 ms	344 KB	Output is correct
27	Correct	0 ms	348 KB	Output is correct
28	Correct	0 ms	348 KB	Output is correct
29	Correct	1 ms	344 KB	Output is correct
30	Correct	1 ms	344 KB	Output is correct
31	Correct	0 ms	348 KB	Output is correct
32	Correct	0 ms	348 KB	Output is correct
33	Correct	1 ms	344 KB	Output is correct
34	Correct	1 ms	344 KB	Output is correct
35	Correct	0 ms	344 KB	Output is correct
36	Correct	1 ms	348 KB	Output is correct
37	Correct	1 ms	344 KB	Output is correct
38	Correct	0 ms	344 KB	Output is correct
39	Correct	0 ms	344 KB	Output is correct
40	Correct	0 ms	348 KB	Output is correct
41	Correct	1 ms	344 KB	Output is correct
42	Correct	1 ms	548 KB	Output is correct
43	Correct	0 ms	344 KB	Output is correct
44	Correct	0 ms	344 KB	Output is correct
45	Correct	1 ms	344 KB	Output is correct
46	Correct	1 ms	344 KB	Output is correct
47	Correct	0 ms	344 KB	Output is correct
48	Correct	0 ms	348 KB	Output is correct
49	Correct	1 ms	344 KB	Output is correct
50	Correct	0 ms	344 KB	Output is correct
51	Correct	0 ms	344 KB	Output is correct
52	Correct	0 ms	344 KB	Output is correct
53	Correct	0 ms	344 KB	Output is correct
54	Correct	0 ms	344 KB	Output is correct
55	Correct	0 ms	344 KB	Output is correct
56	Correct	0 ms	344 KB	Output is correct
57	Correct	0 ms	344 KB	Output is correct
58	Correct	0 ms	344 KB	Output is correct
59	Correct	0 ms	348 KB	Output is correct
60	Correct	0 ms	344 KB	Output is correct
61	Correct	1 ms	344 KB	Output is correct
62	Correct	0 ms	348 KB	Output is correct
63	Correct	0 ms	348 KB	Output is correct
64	Correct	0 ms	344 KB	Output is correct
65	Correct	1 ms	344 KB	Output is correct
66	Correct	1 ms	344 KB	Output is correct
67	Correct	0 ms	344 KB	Output is correct
68	Correct	0 ms	348 KB	Output is correct
69	Correct	0 ms	344 KB	Output is correct
70	Correct	1 ms	348 KB	Output is correct
71	Correct	0 ms	544 KB	Output is correct
72	Correct	0 ms	348 KB	Output is correct
73	Correct	1 ms	344 KB	Output is correct
74	Correct	1 ms	344 KB	Output is correct
75	Correct	0 ms	344 KB	Output is correct
76	Correct	1 ms	344 KB	Output is correct
77	Correct	0 ms	344 KB	Output is correct
78	Correct	1 ms	344 KB	Output is correct
79	Correct	1 ms	344 KB	Output is correct
80	Correct	1 ms	344 KB	Output is correct
81	Correct	1 ms	344 KB	Output is correct
82	Correct	1 ms	344 KB	Output is correct
83	Correct	1 ms	348 KB	Output is correct
84	Correct	1 ms	344 KB	Output is correct
85	Correct	1 ms	344 KB	Output is correct
86	Correct	1 ms	344 KB	Output is correct
87	Correct	1 ms	348 KB	Output is correct
88	Correct	1 ms	344 KB	Output is correct
89	Correct	1 ms	344 KB	Output is correct
90	Correct	1 ms	344 KB	Output is correct
91	Correct	1 ms	348 KB	Output is correct
92	Correct	1 ms	344 KB	Output is correct
93	Correct	1 ms	348 KB	Output is correct
94	Correct	1 ms	344 KB	Output is correct
95	Correct	1 ms	344 KB	Output is correct
96	Correct	1 ms	344 KB	Output is correct
97	Correct	1 ms	600 KB	Output is correct
98	Correct	1 ms	348 KB	Output is correct
99	Correct	1 ms	344 KB	Output is correct
100	Correct	1 ms	344 KB	Output is correct
101	Correct	1 ms	344 KB	Output is correct
102	Correct	1 ms	344 KB	Output is correct
103	Correct	1 ms	344 KB	Output is correct
104	Correct	1 ms	344 KB	Output is correct
105	Correct	1 ms	344 KB	Output is correct
106	Correct	1 ms	344 KB	Output is correct
107	Correct	1 ms	344 KB	Output is correct
108	Correct	1 ms	344 KB	Output is correct
109	Correct	1 ms	348 KB	Output is correct
110	Correct	1 ms	344 KB	Output is correct
111	Correct	1 ms	344 KB	Output is correct
112	Correct	1 ms	344 KB	Output is correct
113	Correct	1 ms	344 KB	Output is correct
114	Correct	1 ms	348 KB	Output is correct
115	Correct	1 ms	344 KB	Output is correct
116	Correct	1 ms	344 KB	Output is correct
117	Correct	1 ms	600 KB	Output is correct
118	Correct	1 ms	344 KB	Output is correct
119	Correct	1 ms	344 KB	Output is correct
120	Correct	1 ms	344 KB	Output is correct
121	Correct	1 ms	344 KB	Output is correct
122	Correct	1 ms	348 KB	Output is correct
123	Correct	1 ms	344 KB	Output is correct
124	Correct	1 ms	344 KB	Output is correct
125	Correct	1 ms	348 KB	Output is correct
126	Correct	1 ms	348 KB	Output is correct
127	Correct	1 ms	344 KB	Output is correct
128	Correct	1 ms	344 KB	Output is correct
129	Correct	1 ms	344 KB	Output is correct
130	Correct	1 ms	344 KB	Output is correct
131	Correct	1 ms	348 KB	Output is correct
132	Correct	1 ms	344 KB	Output is correct
133	Correct	1 ms	344 KB	Output is correct
134	Correct	10 ms	2140 KB	Output is correct
135	Correct	9 ms	1880 KB	Output is correct
136	Correct	24 ms	5464 KB	Output is correct
137	Correct	16 ms	3420 KB	Output is correct
138	Correct	27 ms	4688 KB	Output is correct
139	Correct	47 ms	8016 KB	Output is correct
140	Correct	7 ms	1624 KB	Output is correct
141	Correct	3 ms	860 KB	Output is correct
142	Correct	44 ms	7504 KB	Output is correct
143	Correct	50 ms	8344 KB	Output is correct
144	Correct	1 ms	344 KB	Output is correct
145	Correct	1 ms	344 KB	Output is correct

Submission #919000

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