Submission #626728

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
626728	2022-08-11T17:25:17 Z	iomoon191	Newspapers (CEOI21_newspapers)	C++17	54 / 100	3 ms	2772 KB

newspapers

#include <bits/stdc++.h>
#define sz(x) (int)(x).size()
#define all(x) x.begin(), x.end()
#define For(i, a, b) for(int i = a; i <= b; i++)
#define roF(i, a, b) for(int i = a; i >= b; i--)
using namespace std;
using ll = long long;
using pi = pair<int, int>;
const int N = 1e5 + 5;
const int inf = 0x3f3f3f3f;
// #define int ll

int n, m, par[N];
vector<int> adj[N];
bool ok[N], used[N];

pi dfs(int u, int p = -1){
	pi ret(0, u);
	for(auto &v : adj[u]){
		if(v == p) continue;
		par[v] = u;
		pi i = dfs(v, u); i.first++;
		ret = max(ret, i);
	}
	return ret;
}

void rmain(){
	cin >> n >> m;
	if(m != n - 1){ cout << "NO"; return; }
	if(n == 1){ cout << "YES\n1\n1"; return; }
	if(n == 2){ cout << "YES\n2\n1 1"; return; }
	For(i, 1, m){
		int u, v; cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}
	int f = dfs(1).second;
	int s = dfs(f).second;
	for(int i = s; ; i = par[i]){
		ok[i] = 1; used[i] = 1;
		for(auto &j : adj[i]){
			ok[j] = 1;
			for(auto &k : adj[j]) ok[k] = 1;
		}
		if(i == f) break;
	}
	if(count(ok + 1, ok + n + 1, 0)){
		cout << "NO"; return;
	}
	vector<int> res;
	for(int i = par[s]; i != f; i = par[i]){
		res.push_back(i);
		for(auto &j : adj[i]){
			if(used[i] or sz(adj[j]) == 1)
				continue;
			res.push_back(j);
			res.push_back(i);
		}
	}
	cout << "YES\n" << (sz(res) << 1) << "\n";
	for(auto &i : res) cout << i << " ";
	reverse(all(res));
	for(auto &i : res) cout << i << " ";
}

signed main(int argc, char *argv[]){
	iostream::sync_with_stdio(0);
	int T = 1; 
	while(T--) rmain();
	return 0;
}

Subtask #1
6.0 / 12.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	1 ms	2644 KB	Output is correct
3	Correct	2 ms	2680 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	2 ms	2644 KB	Output is correct
8	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
9	Correct	2 ms	2644 KB	Output is correct
10	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
11	Correct	1 ms	2644 KB	Output is correct
12	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	2 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	1 ms	2684 KB	Output is correct
17	Correct	2 ms	2644 KB	Output is correct
18	Correct	2 ms	2684 KB	Output is correct
19	Correct	1 ms	2644 KB	Output is correct
20	Correct	2 ms	2688 KB	Output is correct
21	Correct	1 ms	2644 KB	Output is correct
22	Correct	2 ms	2680 KB	Output is correct
23	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
24	Correct	2 ms	2644 KB	Output is correct
25	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
26	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
27	Partially correct	1 ms	2676 KB	Failed to provide a successful strategy.
28	Correct	2 ms	2660 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
31	Correct	1 ms	2688 KB	Output is correct
32	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
33	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
34	Correct	2 ms	2600 KB	Output is correct
35	Partially correct	2 ms	2680 KB	Failed to provide a successful strategy.
36	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
37	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
38	Partially correct	1 ms	2684 KB	Failed to provide a successful strategy.
39	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
40	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
41	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
42	Partially correct	2 ms	2688 KB	Failed to provide a successful strategy.
43	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
44	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
45	Correct	1 ms	2644 KB	Output is correct
46	Correct	1 ms	2644 KB	Output is correct
47	Correct	1 ms	2644 KB	Output is correct
48	Partially correct	2 ms	2680 KB	Failed to provide a successful strategy.
49	Correct	2 ms	2684 KB	Output is correct
50	Correct	1 ms	2644 KB	Output is correct
51	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
52	Correct	1 ms	2644 KB	Output is correct
53	Correct	2 ms	2644 KB	Output is correct
54	Partially correct	1 ms	2680 KB	Failed to provide a successful strategy.
55	Correct	1 ms	2644 KB	Output is correct
56	Correct	2 ms	2644 KB	Output is correct
57	Correct	1 ms	2644 KB	Output is correct
58	Correct	2 ms	2644 KB	Output is correct
59	Correct	2 ms	2644 KB	Output is correct
60	Correct	1 ms	2644 KB	Output is correct
61	Correct	2 ms	2644 KB	Output is correct
62	Correct	2 ms	2644 KB	Output is correct
63	Correct	2 ms	2692 KB	Output is correct
64	Correct	1 ms	2644 KB	Output is correct

Subtask #2
8.0 / 8.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	2684 KB	Output is correct
2	Correct	1 ms	2680 KB	Output is correct
3	Correct	2 ms	2684 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	2 ms	2644 KB	Output is correct
6	Correct	2 ms	2644 KB	Output is correct
7	Correct	2 ms	2656 KB	Output is correct
8	Correct	2 ms	2644 KB	Output is correct
9	Correct	2 ms	2680 KB	Output is correct
10	Correct	2 ms	2644 KB	Output is correct
11	Correct	2 ms	2772 KB	Output is correct
12	Correct	2 ms	2644 KB	Output is correct
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	2 ms	2688 KB	Output is correct
15	Correct	2 ms	2688 KB	Output is correct
16	Correct	2 ms	2772 KB	Output is correct
17	Correct	2 ms	2756 KB	Output is correct
18	Correct	2 ms	2772 KB	Output is correct
19	Correct	2 ms	2772 KB	Output is correct
20	Correct	2 ms	2772 KB	Output is correct

Subtask #3
40.0 / 80.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	2 ms	2644 KB	Output is correct
2	Correct	1 ms	2644 KB	Output is correct
3	Correct	2 ms	2680 KB	Output is correct
4	Correct	1 ms	2644 KB	Output is correct
5	Correct	1 ms	2644 KB	Output is correct
6	Correct	1 ms	2644 KB	Output is correct
7	Correct	2 ms	2644 KB	Output is correct
8	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
9	Correct	2 ms	2644 KB	Output is correct
10	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
11	Correct	1 ms	2644 KB	Output is correct
12	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
13	Correct	2 ms	2644 KB	Output is correct
14	Correct	2 ms	2644 KB	Output is correct
15	Correct	1 ms	2644 KB	Output is correct
16	Correct	1 ms	2684 KB	Output is correct
17	Correct	2 ms	2644 KB	Output is correct
18	Correct	2 ms	2684 KB	Output is correct
19	Correct	1 ms	2644 KB	Output is correct
20	Correct	2 ms	2688 KB	Output is correct
21	Correct	1 ms	2644 KB	Output is correct
22	Correct	2 ms	2680 KB	Output is correct
23	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
24	Correct	2 ms	2644 KB	Output is correct
25	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
26	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
27	Partially correct	1 ms	2676 KB	Failed to provide a successful strategy.
28	Correct	2 ms	2660 KB	Output is correct
29	Correct	1 ms	2644 KB	Output is correct
30	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
31	Correct	1 ms	2688 KB	Output is correct
32	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
33	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
34	Correct	2 ms	2600 KB	Output is correct
35	Partially correct	2 ms	2680 KB	Failed to provide a successful strategy.
36	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
37	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
38	Partially correct	1 ms	2684 KB	Failed to provide a successful strategy.
39	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
40	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
41	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
42	Partially correct	2 ms	2688 KB	Failed to provide a successful strategy.
43	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
44	Partially correct	1 ms	2644 KB	Failed to provide a successful strategy.
45	Correct	1 ms	2644 KB	Output is correct
46	Correct	1 ms	2644 KB	Output is correct
47	Correct	1 ms	2644 KB	Output is correct
48	Partially correct	2 ms	2680 KB	Failed to provide a successful strategy.
49	Correct	2 ms	2684 KB	Output is correct
50	Correct	1 ms	2644 KB	Output is correct
51	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
52	Correct	1 ms	2644 KB	Output is correct
53	Correct	2 ms	2644 KB	Output is correct
54	Partially correct	1 ms	2680 KB	Failed to provide a successful strategy.
55	Correct	1 ms	2644 KB	Output is correct
56	Correct	2 ms	2644 KB	Output is correct
57	Correct	1 ms	2644 KB	Output is correct
58	Correct	2 ms	2644 KB	Output is correct
59	Correct	2 ms	2644 KB	Output is correct
60	Correct	1 ms	2644 KB	Output is correct
61	Correct	2 ms	2644 KB	Output is correct
62	Correct	2 ms	2644 KB	Output is correct
63	Correct	2 ms	2692 KB	Output is correct
64	Correct	1 ms	2644 KB	Output is correct
65	Correct	2 ms	2644 KB	Output is correct
66	Correct	2 ms	2684 KB	Output is correct
67	Correct	1 ms	2680 KB	Output is correct
68	Correct	1 ms	2684 KB	Output is correct
69	Correct	2 ms	2644 KB	Output is correct
70	Correct	2 ms	2644 KB	Output is correct
71	Correct	2 ms	2692 KB	Output is correct
72	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
73	Correct	2 ms	2644 KB	Output is correct
74	Partially correct	2 ms	2664 KB	Failed to provide a successful strategy.
75	Correct	1 ms	2644 KB	Output is correct
76	Partially correct	2 ms	2684 KB	Failed to provide a successful strategy.
77	Correct	1 ms	2652 KB	Output is correct
78	Correct	2 ms	2644 KB	Output is correct
79	Correct	2 ms	2644 KB	Output is correct
80	Correct	2 ms	2644 KB	Output is correct
81	Correct	2 ms	2692 KB	Output is correct
82	Correct	2 ms	2772 KB	Output is correct
83	Correct	2 ms	2644 KB	Output is correct
84	Correct	2 ms	2644 KB	Output is correct
85	Correct	2 ms	2644 KB	Output is correct
86	Correct	2 ms	2644 KB	Output is correct
87	Correct	2 ms	2644 KB	Output is correct
88	Correct	2 ms	2644 KB	Output is correct
89	Partially correct	2 ms	2684 KB	Failed to provide a successful strategy.
90	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
91	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
92	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
93	Partially correct	2 ms	2772 KB	Failed to provide a successful strategy.
94	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
95	Partially correct	2 ms	2772 KB	Failed to provide a successful strategy.
96	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
97	Partially correct	2 ms	2688 KB	Failed to provide a successful strategy.
98	Partially correct	2 ms	2772 KB	Failed to provide a successful strategy.
99	Partially correct	2 ms	2772 KB	Failed to provide a successful strategy.
100	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
101	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
102	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
103	Partially correct	2 ms	2684 KB	Failed to provide a successful strategy.
104	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
105	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
106	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
107	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
108	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
109	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
110	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
111	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
112	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
113	Partially correct	2 ms	2772 KB	Failed to provide a successful strategy.
114	Partially correct	2 ms	2684 KB	Failed to provide a successful strategy.
115	Partially correct	3 ms	2692 KB	Failed to provide a successful strategy.
116	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
117	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
118	Partially correct	2 ms	2688 KB	Failed to provide a successful strategy.
119	Partially correct	2 ms	2708 KB	Failed to provide a successful strategy.
120	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
121	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
122	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
123	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
124	Partially correct	2 ms	2672 KB	Failed to provide a successful strategy.
125	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
126	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
127	Partially correct	2 ms	2644 KB	Failed to provide a successful strategy.
128	Partially correct	2 ms	2772 KB	Failed to provide a successful strategy.
129	Correct	2 ms	2688 KB	Output is correct
130	Correct	2 ms	2644 KB	Output is correct
131	Correct	2 ms	2684 KB	Output is correct
132	Correct	2 ms	2644 KB	Output is correct
133	Correct	2 ms	2688 KB	Output is correct
134	Correct	2 ms	2644 KB	Output is correct
135	Correct	2 ms	2644 KB	Output is correct
136	Correct	2 ms	2644 KB	Output is correct
137	Correct	2 ms	2644 KB	Output is correct
138	Correct	2 ms	2732 KB	Output is correct
139	Correct	2 ms	2644 KB	Output is correct
140	Correct	2 ms	2644 KB	Output is correct
141	Correct	2 ms	2644 KB	Output is correct
142	Correct	2 ms	2644 KB	Output is correct
143	Correct	2 ms	2644 KB	Output is correct
144	Correct	2 ms	2772 KB	Output is correct
145	Correct	2 ms	2772 KB	Output is correct

Submission #626728

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