oj.uz

Submission #543436

# Submission time Handle Problem Language Result Execution time Memory
543436 2022-03-30T15:06:10 Z Olympia Network (BOI15_net) C++17
100 / 100
 429 ms 41108 KB 
#include <vector>
#include <algorithm>
#include <iostream>
#include <set>
#include <cmath>
#include <map>
#include <random>
#include <cassert>
#include <ctime>
#include <cstdlib>
#include <queue>
#include <limits.h>

using namespace std;
vector<vector<int>> adj;
vector<int> nodes;
void dfs (int curNode, int prevNode) {
    if (adj[curNode].size() == 1) {
        nodes.push_back(curNode);
    }
    for (int i: adj[curNode]) {
        if (i != prevNode) {
            dfs (i, curNode);
        }
    }
}
int main () {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;
    adj.resize(n);
    for (int i = 0; i < n - 1; i++) {
        int u, v; cin >> u >> v; u--, v--;
        adj[u].push_back(v), adj[v].push_back(u);
    }
    dfs (0, 0);
    cout << (nodes.size() + 1)/2 << '\n';
    for (int i = 0; i < (nodes.size() + 1)/2; i++) {
        cout << nodes[i] + 1 << " " << nodes[i + nodes.size()/2] + 1 << '\n';
    }
}

Compilation message

net.cpp: In function 'int main()':
net.cpp:39:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     for (int i = 0; i < (nodes.size() + 1)/2; i++) {
      |                     ~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 0 ms 212 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 0 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 0 ms 212 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 0 ms 212 KB Output is correct
57 Correct 1 ms 340 KB Output is correct
58 Correct 1 ms 468 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 212 KB Output is correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 0 ms 212 KB Output is correct
17 Correct 0 ms 212 KB Output is correct
18 Correct 0 ms 212 KB Output is correct
19 Correct 0 ms 212 KB Output is correct
20 Correct 1 ms 212 KB Output is correct
21 Correct 0 ms 212 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 2 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 2 ms 340 KB Output is correct
32 Correct 0 ms 212 KB Output is correct
33 Correct 0 ms 212 KB Output is correct
34 Correct 0 ms 212 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 0 ms 212 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 1 ms 340 KB Output is correct
39 Correct 0 ms 212 KB Output is correct
40 Correct 0 ms 212 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 0 ms 340 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 0 ms 212 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 0 ms 212 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 0 ms 212 KB Output is correct
51 Correct 0 ms 212 KB Output is correct
52 Correct 0 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 0 ms 212 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 0 ms 212 KB Output is correct
57 Correct 1 ms 340 KB Output is correct
58 Correct 1 ms 468 KB Output is correct
59 Correct 296 ms 28856 KB Output is correct
60 Correct 367 ms 32180 KB Output is correct
61 Correct 0 ms 212 KB Output is correct
62 Correct 0 ms 212 KB Output is correct
63 Correct 373 ms 25900 KB Output is correct
64 Correct 2 ms 724 KB Output is correct
65 Correct 9 ms 2508 KB Output is correct
66 Correct 107 ms 18148 KB Output is correct
67 Correct 405 ms 40272 KB Output is correct
68 Correct 429 ms 41108 KB Output is correct
69 Correct 7 ms 1364 KB Output is correct
70 Correct 63 ms 11252 KB Output is correct
71 Correct 240 ms 35092 KB Output is correct
72 Correct 332 ms 34428 KB Output is correct
73 Correct 77 ms 8900 KB Output is correct
74 Correct 369 ms 31012 KB Output is correct
75 Correct 20 ms 4180 KB Output is correct
76 Correct 244 ms 34844 KB Output is correct
77 Correct 248 ms 35176 KB Output is correct
78 Correct 19 ms 4308 KB Output is correct
79 Correct 391 ms 38424 KB Output is correct
80 Correct 2 ms 596 KB Output is correct
81 Correct 82 ms 11436 KB Output is correct
82 Correct 315 ms 33068 KB Output is correct
83 Correct 344 ms 31072 KB Output is correct
84 Correct 351 ms 30988 KB Output is correct
85 Correct 342 ms 31076 KB Output is correct
86 Correct 366 ms 32080 KB Output is correct
87 Correct 363 ms 32104 KB Output is correct