oj.uz

Submission #624681

# Submission time Handle Problem Language Result Execution time Memory
624681 2022-08-08T15:20:47 Z iomoon191 Newspapers (CEOI21_newspapers) C++17
100 / 100
 1 ms 468 KB 
#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 = 1005;
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(0, 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[j] or sz(adj[j]) == 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
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 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 1 ms 348 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 352 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 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 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 1 ms 468 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 1 ms 352 KB Output is correct
29 Correct 1 ms 356 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 0 ms 356 KB Output is correct
33 Correct 0 ms 352 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 0 ms 340 KB Output is correct
37 Correct 0 ms 352 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 0 ms 340 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 0 ms 284 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 356 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 352 KB Output is correct
48 Correct 0 ms 352 KB Output is correct
49 Correct 0 ms 340 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 356 KB Output is correct
53 Correct 1 ms 352 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Correct 1 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 1 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 0 ms 340 KB Output is correct
61 Correct 1 ms 340 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 340 KB Output is correct
64 Correct 1 ms 340 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 352 KB Output is correct
2 Correct 0 ms 356 KB Output is correct
3 Correct 0 ms 352 KB Output is correct
4 Correct 0 ms 340 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 352 KB Output is correct
7 Correct 1 ms 356 KB Output is correct
8 Correct 1 ms 344 KB Output is correct
9 Correct 0 ms 356 KB Output is correct
10 Correct 0 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 352 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 356 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 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 1 ms 348 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 0 ms 352 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 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 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 1 ms 468 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 1 ms 352 KB Output is correct
29 Correct 1 ms 356 KB Output is correct
30 Correct 1 ms 340 KB Output is correct
31 Correct 1 ms 340 KB Output is correct
32 Correct 0 ms 356 KB Output is correct
33 Correct 0 ms 352 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 1 ms 340 KB Output is correct
36 Correct 0 ms 340 KB Output is correct
37 Correct 0 ms 352 KB Output is correct
38 Correct 1 ms 348 KB Output is correct
39 Correct 1 ms 340 KB Output is correct
40 Correct 0 ms 340 KB Output is correct
41 Correct 1 ms 348 KB Output is correct
42 Correct 0 ms 284 KB Output is correct
43 Correct 0 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 356 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 352 KB Output is correct
48 Correct 0 ms 352 KB Output is correct
49 Correct 0 ms 340 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 356 KB Output is correct
53 Correct 1 ms 352 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Correct 1 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 1 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 0 ms 340 KB Output is correct
61 Correct 1 ms 340 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 340 KB Output is correct
64 Correct 1 ms 340 KB Output is correct
65 Correct 1 ms 356 KB Output is correct
66 Correct 0 ms 340 KB Output is correct
67 Correct 0 ms 340 KB Output is correct
68 Correct 1 ms 340 KB Output is correct
69 Correct 0 ms 356 KB Output is correct
70 Correct 0 ms 340 KB Output is correct
71 Correct 0 ms 352 KB Output is correct
72 Correct 1 ms 356 KB Output is correct
73 Correct 1 ms 340 KB Output is correct
74 Correct 1 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 1 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 360 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 376 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 356 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 356 KB Output is correct
105 Correct 1 ms 352 KB Output is correct
106 Correct 1 ms 340 KB Output is correct
107 Correct 1 ms 356 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 360 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 468 KB Output is correct
119 Correct 1 ms 356 KB Output is correct
120 Correct 1 ms 356 KB Output is correct
121 Correct 1 ms 352 KB Output is correct
122 Correct 1 ms 356 KB Output is correct
123 Correct 1 ms 340 KB Output is correct
124 Correct 1 ms 356 KB Output is correct
125 Correct 1 ms 340 KB Output is correct
126 Correct 1 ms 356 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 1 ms 340 KB Output is correct
135 Correct 1 ms 340 KB Output is correct
136 Correct 1 ms 340 KB Output is correct
137 Correct 1 ms 340 KB Output is correct
138 Correct 1 ms 340 KB Output is correct
139 Correct 1 ms 340 KB Output is correct
140 Correct 1 ms 340 KB Output is correct
141 Correct 0 ms 340 KB Output is correct
142 Correct 1 ms 340 KB Output is correct
143 Correct 1 ms 364 KB Output is correct
144 Correct 1 ms 468 KB Output is correct
145 Correct 1 ms 468 KB Output is correct