oj.uz

답안 #410597

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
410597 2021-05-23T06:24:17 Z iulia13 Network (BOI15_net) C++14
100 / 100
 1012 ms 47640 KB 
#include <iostream>
#include <vector>
using namespace std;
const int N = 500005;
vector <int> g[N];
int nr = 0;
vector <int> v;
void dfs(int nod, int dad = 0)
{
    if (g[nod].size() == 1)
        v.push_back(nod);
    for (auto x : g[nod])
        if (x != dad)
            dfs(x, nod);
}
int main()
{
    int n, i, a, b;
    cin >> n;
    for (i = 1; i < n; i++)
    {
        cin >> a >> b;
        g[a].push_back(b);
        g[b].push_back(a);
    }
    dfs(1);
    nr = v.size();
    int ans = (nr + 1) / 2;
    cout << ans;
    for (i = 0; i < nr / 2; i ++)
        cout << endl << v[i] << " " << v[i + ans];
    if (nr % 2)
        cout << endl << v[nr / 2] << " " << v[0];
    return 0;
}

Subtask #1
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 11980 KB Output is correct
2 Correct 8 ms 11980 KB Output is correct
3 Correct 8 ms 11940 KB Output is correct
4 Correct 9 ms 11980 KB Output is correct
5 Correct 8 ms 11980 KB Output is correct
6 Correct 8 ms 11980 KB Output is correct
7 Correct 8 ms 11980 KB Output is correct
8 Correct 8 ms 12012 KB Output is correct
9 Correct 8 ms 11980 KB Output is correct
10 Correct 8 ms 11916 KB Output is correct
11 Correct 8 ms 12044 KB Output is correct
12 Correct 8 ms 12036 KB Output is correct
13 Correct 8 ms 12040 KB Output is correct
14 Correct 8 ms 11980 KB Output is correct
15 Correct 8 ms 11980 KB Output is correct
16 Correct 8 ms 11980 KB Output is correct
17 Correct 9 ms 11980 KB Output is correct
18 Correct 8 ms 12008 KB Output is correct
19 Correct 8 ms 12016 KB Output is correct
20 Correct 8 ms 11980 KB Output is correct

Subtask #2
45.0 / 45.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 11980 KB Output is correct
2 Correct 8 ms 11980 KB Output is correct
3 Correct 8 ms 11940 KB Output is correct
4 Correct 9 ms 11980 KB Output is correct
5 Correct 8 ms 11980 KB Output is correct
6 Correct 8 ms 11980 KB Output is correct
7 Correct 8 ms 11980 KB Output is correct
8 Correct 8 ms 12012 KB Output is correct
9 Correct 8 ms 11980 KB Output is correct
10 Correct 8 ms 11916 KB Output is correct
11 Correct 8 ms 12044 KB Output is correct
12 Correct 8 ms 12036 KB Output is correct
13 Correct 8 ms 12040 KB Output is correct
14 Correct 8 ms 11980 KB Output is correct
15 Correct 8 ms 11980 KB Output is correct
16 Correct 8 ms 11980 KB Output is correct
17 Correct 9 ms 11980 KB Output is correct
18 Correct 8 ms 12008 KB Output is correct
19 Correct 8 ms 12016 KB Output is correct
20 Correct 8 ms 11980 KB Output is correct
21 Correct 9 ms 11980 KB Output is correct
22 Correct 11 ms 12108 KB Output is correct
23 Correct 11 ms 12056 KB Output is correct
24 Correct 11 ms 12052 KB Output is correct
25 Correct 11 ms 12088 KB Output is correct
26 Correct 10 ms 12048 KB Output is correct
27 Correct 11 ms 12052 KB Output is correct
28 Correct 12 ms 12108 KB Output is correct
29 Correct 10 ms 12108 KB Output is correct
30 Correct 9 ms 12048 KB Output is correct
31 Correct 12 ms 12140 KB Output is correct
32 Correct 8 ms 12036 KB Output is correct
33 Correct 9 ms 11980 KB Output is correct
34 Correct 8 ms 11924 KB Output is correct
35 Correct 8 ms 12040 KB Output is correct
36 Correct 9 ms 12044 KB Output is correct
37 Correct 9 ms 11972 KB Output is correct
38 Correct 9 ms 12084 KB Output is correct
39 Correct 9 ms 12040 KB Output is correct
40 Correct 8 ms 11980 KB Output is correct
41 Correct 10 ms 11980 KB Output is correct
42 Correct 9 ms 11980 KB Output is correct
43 Correct 9 ms 12040 KB Output is correct
44 Correct 8 ms 11980 KB Output is correct
45 Correct 9 ms 11960 KB Output is correct
46 Correct 9 ms 12048 KB Output is correct
47 Correct 9 ms 12044 KB Output is correct
48 Correct 9 ms 11980 KB Output is correct
49 Correct 10 ms 12048 KB Output is correct
50 Correct 9 ms 11980 KB Output is correct
51 Correct 8 ms 11980 KB Output is correct
52 Correct 9 ms 11980 KB Output is correct
53 Correct 9 ms 11980 KB Output is correct
54 Correct 8 ms 11980 KB Output is correct
55 Correct 9 ms 12040 KB Output is correct
56 Correct 9 ms 12044 KB Output is correct
57 Correct 9 ms 12044 KB Output is correct
58 Correct 12 ms 12044 KB Output is correct

Subtask #3
37.0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 11980 KB Output is correct
2 Correct 8 ms 11980 KB Output is correct
3 Correct 8 ms 11940 KB Output is correct
4 Correct 9 ms 11980 KB Output is correct
5 Correct 8 ms 11980 KB Output is correct
6 Correct 8 ms 11980 KB Output is correct
7 Correct 8 ms 11980 KB Output is correct
8 Correct 8 ms 12012 KB Output is correct
9 Correct 8 ms 11980 KB Output is correct
10 Correct 8 ms 11916 KB Output is correct
11 Correct 8 ms 12044 KB Output is correct
12 Correct 8 ms 12036 KB Output is correct
13 Correct 8 ms 12040 KB Output is correct
14 Correct 8 ms 11980 KB Output is correct
15 Correct 8 ms 11980 KB Output is correct
16 Correct 8 ms 11980 KB Output is correct
17 Correct 9 ms 11980 KB Output is correct
18 Correct 8 ms 12008 KB Output is correct
19 Correct 8 ms 12016 KB Output is correct
20 Correct 8 ms 11980 KB Output is correct
21 Correct 9 ms 11980 KB Output is correct
22 Correct 11 ms 12108 KB Output is correct
23 Correct 11 ms 12056 KB Output is correct
24 Correct 11 ms 12052 KB Output is correct
25 Correct 11 ms 12088 KB Output is correct
26 Correct 10 ms 12048 KB Output is correct
27 Correct 11 ms 12052 KB Output is correct
28 Correct 12 ms 12108 KB Output is correct
29 Correct 10 ms 12108 KB Output is correct
30 Correct 9 ms 12048 KB Output is correct
31 Correct 12 ms 12140 KB Output is correct
32 Correct 8 ms 12036 KB Output is correct
33 Correct 9 ms 11980 KB Output is correct
34 Correct 8 ms 11924 KB Output is correct
35 Correct 8 ms 12040 KB Output is correct
36 Correct 9 ms 12044 KB Output is correct
37 Correct 9 ms 11972 KB Output is correct
38 Correct 9 ms 12084 KB Output is correct
39 Correct 9 ms 12040 KB Output is correct
40 Correct 8 ms 11980 KB Output is correct
41 Correct 10 ms 11980 KB Output is correct
42 Correct 9 ms 11980 KB Output is correct
43 Correct 9 ms 12040 KB Output is correct
44 Correct 8 ms 11980 KB Output is correct
45 Correct 9 ms 11960 KB Output is correct
46 Correct 9 ms 12048 KB Output is correct
47 Correct 9 ms 12044 KB Output is correct
48 Correct 9 ms 11980 KB Output is correct
49 Correct 10 ms 12048 KB Output is correct
50 Correct 9 ms 11980 KB Output is correct
51 Correct 8 ms 11980 KB Output is correct
52 Correct 9 ms 11980 KB Output is correct
53 Correct 9 ms 11980 KB Output is correct
54 Correct 8 ms 11980 KB Output is correct
55 Correct 9 ms 12040 KB Output is correct
56 Correct 9 ms 12044 KB Output is correct
57 Correct 9 ms 12044 KB Output is correct
58 Correct 12 ms 12044 KB Output is correct
59 Correct 872 ms 35932 KB Output is correct
60 Correct 998 ms 38676 KB Output is correct
61 Correct 8 ms 11980 KB Output is correct
62 Correct 8 ms 11980 KB Output is correct
63 Correct 767 ms 33544 KB Output is correct
64 Correct 12 ms 12440 KB Output is correct
65 Correct 29 ms 13868 KB Output is correct
66 Correct 263 ms 27848 KB Output is correct
67 Correct 746 ms 46872 KB Output is correct
68 Correct 749 ms 47640 KB Output is correct
69 Correct 32 ms 12808 KB Output is correct
70 Correct 284 ms 21200 KB Output is correct
71 Correct 977 ms 41804 KB Output is correct
72 Correct 927 ms 40676 KB Output is correct
73 Correct 237 ms 19016 KB Output is correct
74 Correct 912 ms 37576 KB Output is correct
75 Correct 99 ms 15172 KB Output is correct
76 Correct 966 ms 41504 KB Output is correct
77 Correct 981 ms 41568 KB Output is correct
78 Correct 79 ms 15244 KB Output is correct
79 Correct 746 ms 45240 KB Output is correct
80 Correct 15 ms 12228 KB Output is correct
81 Correct 284 ms 21248 KB Output is correct
82 Correct 959 ms 39480 KB Output is correct
83 Correct 900 ms 37648 KB Output is correct
84 Correct 916 ms 37656 KB Output is correct
85 Correct 957 ms 37680 KB Output is correct
86 Correct 989 ms 38840 KB Output is correct
87 Correct 1012 ms 38716 KB Output is correct