답안 #917656

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
917656	2024-01-28T14:10:39 Z	VMaksimoski008	Network (BOI15_net)	C++14	100 / 100	654 ms	41260 KB

#include <bits/stdc++.h>
using namespace std;

int n, a, b, i;
vector<vector<int> > G(500005);
vector<int> L;

void dfs(int u, int p) {
    for(int &v : G[u])
        if(v != p) dfs(v, u);
    if(G[u].size() == 1) L.push_back(u);
}

int main() {
    cin >> n;

    for(i=0; i<n-1; i++) {
        cin >> a >> b;
        G[a].push_back(b);
        G[b].push_back(a);
    }

    dfs(1, 0);

    int sz = L.size();
    cout << (sz+1)/2 << '\n';
    for(i=0; i<sz/2; i++)
        cout << L[i] << " " << L[i+sz/2] << '\n';
    if(sz % 2 == 1) cout << L[0] << " " << L[sz-1] << '\n';
    return 0;
}

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	12120 KB	Output is correct
2	Correct	4 ms	12124 KB	Output is correct
3	Correct	4 ms	12124 KB	Output is correct
4	Correct	4 ms	12124 KB	Output is correct
5	Correct	4 ms	12124 KB	Output is correct
6	Correct	3 ms	12124 KB	Output is correct
7	Correct	4 ms	12120 KB	Output is correct
8	Correct	4 ms	12124 KB	Output is correct
9	Correct	3 ms	12124 KB	Output is correct
10	Correct	4 ms	12120 KB	Output is correct
11	Correct	4 ms	12124 KB	Output is correct
12	Correct	4 ms	12120 KB	Output is correct
13	Correct	4 ms	12124 KB	Output is correct
14	Correct	4 ms	12376 KB	Output is correct
15	Correct	4 ms	12124 KB	Output is correct
16	Correct	4 ms	12124 KB	Output is correct
17	Correct	3 ms	12124 KB	Output is correct
18	Correct	4 ms	12124 KB	Output is correct
19	Correct	4 ms	12124 KB	Output is correct
20	Correct	5 ms	12376 KB	Output is correct

Subtask #2
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	12120 KB	Output is correct
2	Correct	4 ms	12124 KB	Output is correct
3	Correct	4 ms	12124 KB	Output is correct
4	Correct	4 ms	12124 KB	Output is correct
5	Correct	4 ms	12124 KB	Output is correct
6	Correct	3 ms	12124 KB	Output is correct
7	Correct	4 ms	12120 KB	Output is correct
8	Correct	4 ms	12124 KB	Output is correct
9	Correct	3 ms	12124 KB	Output is correct
10	Correct	4 ms	12120 KB	Output is correct
11	Correct	4 ms	12124 KB	Output is correct
12	Correct	4 ms	12120 KB	Output is correct
13	Correct	4 ms	12124 KB	Output is correct
14	Correct	4 ms	12376 KB	Output is correct
15	Correct	4 ms	12124 KB	Output is correct
16	Correct	4 ms	12124 KB	Output is correct
17	Correct	3 ms	12124 KB	Output is correct
18	Correct	4 ms	12124 KB	Output is correct
19	Correct	4 ms	12124 KB	Output is correct
20	Correct	5 ms	12376 KB	Output is correct
21	Correct	4 ms	12124 KB	Output is correct
22	Correct	7 ms	12124 KB	Output is correct
23	Correct	5 ms	12256 KB	Output is correct
24	Correct	4 ms	12124 KB	Output is correct
25	Correct	5 ms	12124 KB	Output is correct
26	Correct	4 ms	12120 KB	Output is correct
27	Correct	5 ms	12124 KB	Output is correct
28	Correct	5 ms	12124 KB	Output is correct
29	Correct	5 ms	12124 KB	Output is correct
30	Correct	3 ms	12124 KB	Output is correct
31	Correct	5 ms	12124 KB	Output is correct
32	Correct	3 ms	12124 KB	Output is correct
33	Correct	3 ms	12124 KB	Output is correct
34	Correct	3 ms	12124 KB	Output is correct
35	Correct	3 ms	12180 KB	Output is correct
36	Correct	5 ms	12120 KB	Output is correct
37	Correct	5 ms	12124 KB	Output is correct
38	Correct	4 ms	12120 KB	Output is correct
39	Correct	3 ms	12124 KB	Output is correct
40	Correct	4 ms	12124 KB	Output is correct
41	Correct	4 ms	12124 KB	Output is correct
42	Correct	3 ms	12124 KB	Output is correct
43	Correct	7 ms	12120 KB	Output is correct
44	Correct	4 ms	12124 KB	Output is correct
45	Correct	4 ms	12124 KB	Output is correct
46	Correct	5 ms	12464 KB	Output is correct
47	Correct	4 ms	12124 KB	Output is correct
48	Correct	3 ms	12124 KB	Output is correct
49	Correct	5 ms	12124 KB	Output is correct
50	Correct	5 ms	12124 KB	Output is correct
51	Correct	3 ms	12376 KB	Output is correct
52	Correct	4 ms	12124 KB	Output is correct
53	Correct	4 ms	12124 KB	Output is correct
54	Correct	4 ms	12120 KB	Output is correct
55	Correct	4 ms	12124 KB	Output is correct
56	Correct	3 ms	12152 KB	Output is correct
57	Correct	4 ms	12124 KB	Output is correct
58	Correct	5 ms	12184 KB	Output is correct

Subtask #3
37.0 / 37.0

#	결과	실행 시간	메모리	Grader output
1	Correct	4 ms	12120 KB	Output is correct
2	Correct	4 ms	12124 KB	Output is correct
3	Correct	4 ms	12124 KB	Output is correct
4	Correct	4 ms	12124 KB	Output is correct
5	Correct	4 ms	12124 KB	Output is correct
6	Correct	3 ms	12124 KB	Output is correct
7	Correct	4 ms	12120 KB	Output is correct
8	Correct	4 ms	12124 KB	Output is correct
9	Correct	3 ms	12124 KB	Output is correct
10	Correct	4 ms	12120 KB	Output is correct
11	Correct	4 ms	12124 KB	Output is correct
12	Correct	4 ms	12120 KB	Output is correct
13	Correct	4 ms	12124 KB	Output is correct
14	Correct	4 ms	12376 KB	Output is correct
15	Correct	4 ms	12124 KB	Output is correct
16	Correct	4 ms	12124 KB	Output is correct
17	Correct	3 ms	12124 KB	Output is correct
18	Correct	4 ms	12124 KB	Output is correct
19	Correct	4 ms	12124 KB	Output is correct
20	Correct	5 ms	12376 KB	Output is correct
21	Correct	4 ms	12124 KB	Output is correct
22	Correct	7 ms	12124 KB	Output is correct
23	Correct	5 ms	12256 KB	Output is correct
24	Correct	4 ms	12124 KB	Output is correct
25	Correct	5 ms	12124 KB	Output is correct
26	Correct	4 ms	12120 KB	Output is correct
27	Correct	5 ms	12124 KB	Output is correct
28	Correct	5 ms	12124 KB	Output is correct
29	Correct	5 ms	12124 KB	Output is correct
30	Correct	3 ms	12124 KB	Output is correct
31	Correct	5 ms	12124 KB	Output is correct
32	Correct	3 ms	12124 KB	Output is correct
33	Correct	3 ms	12124 KB	Output is correct
34	Correct	3 ms	12124 KB	Output is correct
35	Correct	3 ms	12180 KB	Output is correct
36	Correct	5 ms	12120 KB	Output is correct
37	Correct	5 ms	12124 KB	Output is correct
38	Correct	4 ms	12120 KB	Output is correct
39	Correct	3 ms	12124 KB	Output is correct
40	Correct	4 ms	12124 KB	Output is correct
41	Correct	4 ms	12124 KB	Output is correct
42	Correct	3 ms	12124 KB	Output is correct
43	Correct	7 ms	12120 KB	Output is correct
44	Correct	4 ms	12124 KB	Output is correct
45	Correct	4 ms	12124 KB	Output is correct
46	Correct	5 ms	12464 KB	Output is correct
47	Correct	4 ms	12124 KB	Output is correct
48	Correct	3 ms	12124 KB	Output is correct
49	Correct	5 ms	12124 KB	Output is correct
50	Correct	5 ms	12124 KB	Output is correct
51	Correct	3 ms	12376 KB	Output is correct
52	Correct	4 ms	12124 KB	Output is correct
53	Correct	4 ms	12124 KB	Output is correct
54	Correct	4 ms	12120 KB	Output is correct
55	Correct	4 ms	12124 KB	Output is correct
56	Correct	3 ms	12152 KB	Output is correct
57	Correct	4 ms	12124 KB	Output is correct
58	Correct	5 ms	12184 KB	Output is correct
59	Correct	455 ms	30164 KB	Output is correct
60	Correct	493 ms	32260 KB	Output is correct
61	Correct	3 ms	12120 KB	Output is correct
62	Correct	3 ms	12124 KB	Output is correct
63	Correct	481 ms	28160 KB	Output is correct
64	Correct	7 ms	12376 KB	Output is correct
65	Correct	18 ms	13676 KB	Output is correct
66	Correct	141 ms	25572 KB	Output is correct
67	Correct	611 ms	40268 KB	Output is correct
68	Correct	654 ms	41260 KB	Output is correct
69	Correct	12 ms	12888 KB	Output is correct
70	Correct	109 ms	19276 KB	Output is correct
71	Correct	398 ms	35136 KB	Output is correct
72	Correct	432 ms	34348 KB	Output is correct
73	Correct	94 ms	17356 KB	Output is correct
74	Correct	505 ms	31184 KB	Output is correct
75	Correct	39 ms	14544 KB	Output is correct
76	Correct	492 ms	34884 KB	Output is correct
77	Correct	416 ms	35240 KB	Output is correct
78	Correct	37 ms	14676 KB	Output is correct
79	Correct	574 ms	38480 KB	Output is correct
80	Correct	7 ms	12120 KB	Output is correct
81	Correct	150 ms	19232 KB	Output is correct
82	Correct	446 ms	33232 KB	Output is correct
83	Correct	540 ms	31040 KB	Output is correct
84	Correct	559 ms	30932 KB	Output is correct
85	Correct	520 ms	30956 KB	Output is correct
86	Correct	558 ms	32112 KB	Output is correct
87	Correct	499 ms	32200 KB	Output is correct

답안 #917656

Compilation message

Subtask #1 18.0 / 18.0

Subtask #2 45.0 / 45.0

Subtask #3 37.0 / 37.0

Subtask #1
18.0 / 18.0

Subtask #2
45.0 / 45.0

Subtask #3
37.0 / 37.0