oj.uz

Submission #518619

# Submission time Handle Problem Language Result Execution time Memory
518619 2022-01-24T09:55:15 Z prvocislo Newspapers (CEOI21_newspapers) C++17
100 / 100
 1 ms 460 KB 
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
#include <set>
#include <map>
#include <queue>
typedef long long ll;
using namespace std;

const int maxn = 1e3 + 5;
vector<vector<int> > g;
vector<int> d, p;
int n, m;
void ready()
{
    d.assign(n, -1), p.assign(n, -1);
}
void dfs(int u)
{
    for (int v : g[u])
    {
        if (d[v] == -1)
        {
            d[v] = d[u] + 1;
            p[v] = u;
            dfs(v);
        }
    }
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> m;
    if (m >= n)
    {
        cout << "NO\n";
        return 0;
    }
    if (n <= 2)
    {
        cout << "YES\n" << n << "\n";
        for (int i = 0; i < n; i++) cout << "1 ";
        cout << "\n";
        return 0;
    }
    g.assign(n, {});
    for (int i = 0, a, b; i < n - 1; i++)
    {
        cin >> a >> b;
        a--, b--;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    ready();
    d[0] = 0;
    dfs(0);
    int e1 = max_element(d.begin(), d.end()) - d.begin();
    ready();
    d[e1] = 0;
    dfs(e1);
    int e2 = max_element(d.begin(), d.end()) - d.begin();
    vector<int> di;
    for (int i = e2; i != -1; i = p[i]) di.push_back(i);
    ready();
    for (int i : di) d[i] = 0;
    for (int i : di) dfs(i);
    if (*max_element(d.begin(), d.end()) >= 3)
    {
        cout << "NO\n";
        return 0;
    }
    cout << "YES\n";
    vector<int> ans;
    for (int i = 1; i + 1 < di.size(); i++)
    {
        ans.push_back(di[i]);
        for (int j : g[di[i]]) if (d[j] && g[j].size() > 1)
        {
            ans.push_back(j);
            ans.push_back(di[i]);
        }
    }
    int k = ans.size();
    for (int i = 0; i < k; i++) ans.push_back(ans[k - i - 1]);
    cout << ans.size() << "\n";
    for (int i = 0; i < ans.size(); i++) cout << ans[i] + 1 << " \n"[i == ans.size() - 1];
    return 0;
}

Compilation message

newspapers.cpp: In function 'int main()':
newspapers.cpp:76:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |     for (int i = 1; i + 1 < di.size(); i++)
      |                     ~~~~~~^~~~~~~~~~~
newspapers.cpp:88:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |     for (int i = 0; i < ans.size(); i++) cout << ans[i] + 1 << " \n"[i == ans.size() - 1];
      |                     ~~^~~~~~~~~~~~
newspapers.cpp:88:72: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   88 |     for (int i = 0; i < ans.size(); i++) cout << ans[i] + 1 << " \n"[i == ans.size() - 1];
      |                                                                      ~~^~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 316 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 316 KB Output is correct
16 Correct 1 ms 312 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 0 ms 312 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 312 KB Output is correct
27 Correct 0 ms 208 KB Output is correct
28 Correct 0 ms 316 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 1 ms 312 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 1 ms 204 KB Output is correct
37 Correct 1 ms 204 KB Output is correct
38 Correct 0 ms 308 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 1 ms 312 KB Output is correct
43 Correct 1 ms 312 KB Output is correct
44 Correct 1 ms 204 KB Output is correct
45 Correct 1 ms 204 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 0 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 1 ms 316 KB Output is correct
51 Correct 1 ms 308 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Correct 0 ms 204 KB Output is correct
54 Correct 0 ms 308 KB Output is correct
55 Correct 0 ms 204 KB Output is correct
56 Correct 0 ms 204 KB Output is correct
57 Correct 1 ms 204 KB Output is correct
58 Correct 0 ms 204 KB Output is correct
59 Correct 0 ms 204 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 0 ms 204 KB Output is correct
62 Correct 1 ms 316 KB Output is correct
63 Correct 1 ms 204 KB Output is correct
64 Correct 1 ms 204 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Correct 1 ms 308 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 332 KB Output is correct
13 Correct 1 ms 312 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 1 ms 332 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 460 KB Output is correct
18 Correct 1 ms 444 KB Output is correct
19 Correct 1 ms 332 KB Output is correct
20 Correct 1 ms 332 KB Output is correct

Subtask #3
80.0 / 80.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 316 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 0 ms 204 KB Output is correct
14 Correct 0 ms 204 KB Output is correct
15 Correct 0 ms 316 KB Output is correct
16 Correct 1 ms 312 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 0 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 0 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 0 ms 204 KB Output is correct
24 Correct 0 ms 312 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 312 KB Output is correct
27 Correct 0 ms 208 KB Output is correct
28 Correct 0 ms 316 KB Output is correct
29 Correct 0 ms 204 KB Output is correct
30 Correct 1 ms 312 KB Output is correct
31 Correct 1 ms 204 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 1 ms 204 KB Output is correct
37 Correct 1 ms 204 KB Output is correct
38 Correct 0 ms 308 KB Output is correct
39 Correct 0 ms 204 KB Output is correct
40 Correct 0 ms 204 KB Output is correct
41 Correct 0 ms 204 KB Output is correct
42 Correct 1 ms 312 KB Output is correct
43 Correct 1 ms 312 KB Output is correct
44 Correct 1 ms 204 KB Output is correct
45 Correct 1 ms 204 KB Output is correct
46 Correct 1 ms 204 KB Output is correct
47 Correct 0 ms 204 KB Output is correct
48 Correct 1 ms 204 KB Output is correct
49 Correct 0 ms 204 KB Output is correct
50 Correct 1 ms 316 KB Output is correct
51 Correct 1 ms 308 KB Output is correct
52 Correct 0 ms 204 KB Output is correct
53 Correct 0 ms 204 KB Output is correct
54 Correct 0 ms 308 KB Output is correct
55 Correct 0 ms 204 KB Output is correct
56 Correct 0 ms 204 KB Output is correct
57 Correct 1 ms 204 KB Output is correct
58 Correct 0 ms 204 KB Output is correct
59 Correct 0 ms 204 KB Output is correct
60 Correct 0 ms 212 KB Output is correct
61 Correct 0 ms 204 KB Output is correct
62 Correct 1 ms 316 KB Output is correct
63 Correct 1 ms 204 KB Output is correct
64 Correct 1 ms 204 KB Output is correct
65 Correct 1 ms 204 KB Output is correct
66 Correct 1 ms 204 KB Output is correct
67 Correct 0 ms 204 KB Output is correct
68 Correct 0 ms 204 KB Output is correct
69 Correct 0 ms 204 KB Output is correct
70 Correct 1 ms 204 KB Output is correct
71 Correct 1 ms 204 KB Output is correct
72 Correct 1 ms 204 KB Output is correct
73 Correct 0 ms 204 KB Output is correct
74 Correct 0 ms 204 KB Output is correct
75 Correct 0 ms 204 KB Output is correct
76 Correct 1 ms 312 KB Output is correct
77 Correct 0 ms 204 KB Output is correct
78 Correct 1 ms 204 KB Output is correct
79 Correct 1 ms 332 KB Output is correct
80 Correct 1 ms 332 KB Output is correct
81 Correct 1 ms 332 KB Output is correct
82 Correct 1 ms 328 KB Output is correct
83 Correct 1 ms 332 KB Output is correct
84 Correct 1 ms 332 KB Output is correct
85 Correct 1 ms 332 KB Output is correct
86 Correct 1 ms 332 KB Output is correct
87 Correct 1 ms 332 KB Output is correct
88 Correct 1 ms 316 KB Output is correct
89 Correct 1 ms 332 KB Output is correct
90 Correct 1 ms 332 KB Output is correct
91 Correct 1 ms 300 KB Output is correct
92 Correct 1 ms 332 KB Output is correct
93 Correct 1 ms 332 KB Output is correct
94 Correct 1 ms 332 KB Output is correct
95 Correct 1 ms 332 KB Output is correct
96 Correct 1 ms 332 KB Output is correct
97 Correct 1 ms 332 KB Output is correct
98 Correct 1 ms 332 KB Output is correct
99 Correct 1 ms 332 KB Output is correct
100 Correct 1 ms 332 KB Output is correct
101 Correct 1 ms 332 KB Output is correct
102 Correct 1 ms 332 KB Output is correct
103 Correct 1 ms 332 KB Output is correct
104 Correct 1 ms 332 KB Output is correct
105 Correct 1 ms 316 KB Output is correct
106 Correct 1 ms 332 KB Output is correct
107 Correct 1 ms 332 KB Output is correct
108 Correct 1 ms 332 KB Output is correct
109 Correct 1 ms 332 KB Output is correct
110 Correct 1 ms 460 KB Output is correct
111 Correct 1 ms 332 KB Output is correct
112 Correct 1 ms 332 KB Output is correct
113 Correct 1 ms 332 KB Output is correct
114 Correct 1 ms 332 KB Output is correct
115 Correct 1 ms 332 KB Output is correct
116 Correct 1 ms 328 KB Output is correct
117 Correct 1 ms 332 KB Output is correct
118 Correct 1 ms 324 KB Output is correct
119 Correct 1 ms 320 KB Output is correct
120 Correct 1 ms 320 KB Output is correct
121 Correct 1 ms 332 KB Output is correct
122 Correct 1 ms 332 KB Output is correct
123 Correct 1 ms 332 KB Output is correct
124 Correct 1 ms 316 KB Output is correct
125 Correct 1 ms 332 KB Output is correct
126 Correct 1 ms 332 KB Output is correct
127 Correct 1 ms 332 KB Output is correct
128 Correct 1 ms 332 KB Output is correct
129 Correct 1 ms 332 KB Output is correct
130 Correct 1 ms 332 KB Output is correct
131 Correct 1 ms 332 KB Output is correct
132 Correct 1 ms 320 KB Output is correct
133 Correct 1 ms 332 KB Output is correct
134 Correct 0 ms 332 KB Output is correct
135 Correct 1 ms 332 KB Output is correct
136 Correct 0 ms 332 KB Output is correct
137 Correct 0 ms 332 KB Output is correct
138 Correct 0 ms 332 KB Output is correct
139 Correct 1 ms 332 KB Output is correct
140 Correct 1 ms 324 KB Output is correct
141 Correct 1 ms 332 KB Output is correct
142 Correct 1 ms 332 KB Output is correct
143 Correct 1 ms 332 KB Output is correct
144 Correct 1 ms 460 KB Output is correct
145 Correct 1 ms 404 KB Output is correct