답안 #394757

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
394757	2021-04-27T09:31:39 Z	Hossein8320	Network (BOI15_net)	C++17	100 / 100	492 ms	47656 KB

//That's what she said
#include <bits/stdc++.h>
#define int long long
#define pb push_back
#define F first
#define S second
using namespace std;
const int maxn = 5e5 + 9, modn = 1e9 + 7;
int n, m, v, u;
vector <int> barg, adj[maxn];
void dfs(int v, int par)
{
    if(adj[v].size() == 1) barg.pb(v);
    for(auto i : adj[v]) if(i != par) dfs(i, v);
}
int32_t main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0), cout.tie(0);
	cin >> n;
	for(int i = 1; i < n; i++) cin >> v >> u, adj[v].pb(u), adj[u].pb(v);
	dfs(1, 1);
	cout << (barg.size() + 1) / 2 << '\n';
	int s = barg.size() / 2;
	for(int i = 0; i < s; i++) cout << barg[i] << " " << barg[i + s] << '\n';
    if(s != (barg.size() + 1) / 2) cout << barg[2 * s] << " " << barg[0] << '\n';
	return 0;
}

Compilation message

net.cpp: In function 'int32_t main()':
net.cpp:25:10: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     if(s != (barg.size() + 1) / 2) cout << barg[2 * s] << " " << barg[0] << '\n';
      |        ~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	8 ms	11980 KB	Output is correct
2	Correct	9 ms	11980 KB	Output is correct
3	Correct	7 ms	11980 KB	Output is correct
4	Correct	8 ms	11984 KB	Output is correct
5	Correct	7 ms	11980 KB	Output is correct
6	Correct	9 ms	11980 KB	Output is correct
7	Correct	8 ms	11980 KB	Output is correct
8	Correct	8 ms	11980 KB	Output is correct
9	Correct	8 ms	11980 KB	Output is correct
10	Correct	8 ms	12060 KB	Output is correct
11	Correct	8 ms	12060 KB	Output is correct
12	Correct	7 ms	12060 KB	Output is correct
13	Correct	8 ms	11980 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	11992 KB	Output is correct
17	Correct	8 ms	12040 KB	Output is correct
18	Correct	9 ms	11980 KB	Output is correct
19	Correct	9 ms	12064 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	9 ms	11980 KB	Output is correct
3	Correct	7 ms	11980 KB	Output is correct
4	Correct	8 ms	11984 KB	Output is correct
5	Correct	7 ms	11980 KB	Output is correct
6	Correct	9 ms	11980 KB	Output is correct
7	Correct	8 ms	11980 KB	Output is correct
8	Correct	8 ms	11980 KB	Output is correct
9	Correct	8 ms	11980 KB	Output is correct
10	Correct	8 ms	12060 KB	Output is correct
11	Correct	8 ms	12060 KB	Output is correct
12	Correct	7 ms	12060 KB	Output is correct
13	Correct	8 ms	11980 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	11992 KB	Output is correct
17	Correct	8 ms	12040 KB	Output is correct
18	Correct	9 ms	11980 KB	Output is correct
19	Correct	9 ms	12064 KB	Output is correct
20	Correct	8 ms	11980 KB	Output is correct
21	Correct	7 ms	11980 KB	Output is correct
22	Correct	8 ms	12108 KB	Output is correct
23	Correct	8 ms	12200 KB	Output is correct
24	Correct	8 ms	12108 KB	Output is correct
25	Correct	10 ms	12180 KB	Output is correct
26	Correct	8 ms	12132 KB	Output is correct
27	Correct	9 ms	12108 KB	Output is correct
28	Correct	9 ms	12108 KB	Output is correct
29	Correct	8 ms	12076 KB	Output is correct
30	Correct	9 ms	11984 KB	Output is correct
31	Correct	9 ms	12068 KB	Output is correct
32	Correct	8 ms	11980 KB	Output is correct
33	Correct	8 ms	11960 KB	Output is correct
34	Correct	8 ms	12064 KB	Output is correct
35	Correct	8 ms	12040 KB	Output is correct
36	Correct	7 ms	11980 KB	Output is correct
37	Correct	8 ms	11980 KB	Output is correct
38	Correct	8 ms	12060 KB	Output is correct
39	Correct	8 ms	11980 KB	Output is correct
40	Correct	8 ms	11980 KB	Output is correct
41	Correct	8 ms	11980 KB	Output is correct
42	Correct	8 ms	11980 KB	Output is correct
43	Correct	8 ms	12108 KB	Output is correct
44	Correct	8 ms	12064 KB	Output is correct
45	Correct	8 ms	12064 KB	Output is correct
46	Correct	8 ms	12108 KB	Output is correct
47	Correct	8 ms	11980 KB	Output is correct
48	Correct	8 ms	12060 KB	Output is correct
49	Correct	8 ms	12064 KB	Output is correct
50	Correct	8 ms	11980 KB	Output is correct
51	Correct	8 ms	11980 KB	Output is correct
52	Correct	8 ms	11980 KB	Output is correct
53	Correct	8 ms	12108 KB	Output is correct
54	Correct	8 ms	11980 KB	Output is correct
55	Correct	8 ms	12056 KB	Output is correct
56	Correct	8 ms	11976 KB	Output is correct
57	Correct	9 ms	12068 KB	Output is correct
58	Correct	9 ms	12108 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	9 ms	11980 KB	Output is correct
3	Correct	7 ms	11980 KB	Output is correct
4	Correct	8 ms	11984 KB	Output is correct
5	Correct	7 ms	11980 KB	Output is correct
6	Correct	9 ms	11980 KB	Output is correct
7	Correct	8 ms	11980 KB	Output is correct
8	Correct	8 ms	11980 KB	Output is correct
9	Correct	8 ms	11980 KB	Output is correct
10	Correct	8 ms	12060 KB	Output is correct
11	Correct	8 ms	12060 KB	Output is correct
12	Correct	7 ms	12060 KB	Output is correct
13	Correct	8 ms	11980 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	11992 KB	Output is correct
17	Correct	8 ms	12040 KB	Output is correct
18	Correct	9 ms	11980 KB	Output is correct
19	Correct	9 ms	12064 KB	Output is correct
20	Correct	8 ms	11980 KB	Output is correct
21	Correct	7 ms	11980 KB	Output is correct
22	Correct	8 ms	12108 KB	Output is correct
23	Correct	8 ms	12200 KB	Output is correct
24	Correct	8 ms	12108 KB	Output is correct
25	Correct	10 ms	12180 KB	Output is correct
26	Correct	8 ms	12132 KB	Output is correct
27	Correct	9 ms	12108 KB	Output is correct
28	Correct	9 ms	12108 KB	Output is correct
29	Correct	8 ms	12076 KB	Output is correct
30	Correct	9 ms	11984 KB	Output is correct
31	Correct	9 ms	12068 KB	Output is correct
32	Correct	8 ms	11980 KB	Output is correct
33	Correct	8 ms	11960 KB	Output is correct
34	Correct	8 ms	12064 KB	Output is correct
35	Correct	8 ms	12040 KB	Output is correct
36	Correct	7 ms	11980 KB	Output is correct
37	Correct	8 ms	11980 KB	Output is correct
38	Correct	8 ms	12060 KB	Output is correct
39	Correct	8 ms	11980 KB	Output is correct
40	Correct	8 ms	11980 KB	Output is correct
41	Correct	8 ms	11980 KB	Output is correct
42	Correct	8 ms	11980 KB	Output is correct
43	Correct	8 ms	12108 KB	Output is correct
44	Correct	8 ms	12064 KB	Output is correct
45	Correct	8 ms	12064 KB	Output is correct
46	Correct	8 ms	12108 KB	Output is correct
47	Correct	8 ms	11980 KB	Output is correct
48	Correct	8 ms	12060 KB	Output is correct
49	Correct	8 ms	12064 KB	Output is correct
50	Correct	8 ms	11980 KB	Output is correct
51	Correct	8 ms	11980 KB	Output is correct
52	Correct	8 ms	11980 KB	Output is correct
53	Correct	8 ms	12108 KB	Output is correct
54	Correct	8 ms	11980 KB	Output is correct
55	Correct	8 ms	12056 KB	Output is correct
56	Correct	8 ms	11976 KB	Output is correct
57	Correct	9 ms	12068 KB	Output is correct
58	Correct	9 ms	12108 KB	Output is correct
59	Correct	352 ms	36108 KB	Output is correct
60	Correct	446 ms	38184 KB	Output is correct
61	Correct	8 ms	11980 KB	Output is correct
62	Correct	8 ms	11992 KB	Output is correct
63	Correct	342 ms	32812 KB	Output is correct
64	Correct	10 ms	12492 KB	Output is correct
65	Correct	19 ms	14144 KB	Output is correct
66	Correct	150 ms	29716 KB	Output is correct
67	Correct	488 ms	45892 KB	Output is correct
68	Correct	491 ms	47656 KB	Output is correct
69	Correct	14 ms	13092 KB	Output is correct
70	Correct	88 ms	22412 KB	Output is correct
71	Correct	322 ms	40484 KB	Output is correct
72	Correct	374 ms	39472 KB	Output is correct
73	Correct	116 ms	19260 KB	Output is correct
74	Correct	448 ms	36036 KB	Output is correct
75	Correct	32 ms	15640 KB	Output is correct
76	Correct	335 ms	40108 KB	Output is correct
77	Correct	319 ms	40468 KB	Output is correct
78	Correct	33 ms	15920 KB	Output is correct
79	Correct	492 ms	43508 KB	Output is correct
80	Correct	10 ms	12236 KB	Output is correct
81	Correct	104 ms	21612 KB	Output is correct
82	Correct	392 ms	38284 KB	Output is correct
83	Correct	428 ms	36092 KB	Output is correct
84	Correct	433 ms	36156 KB	Output is correct
85	Correct	429 ms	36124 KB	Output is correct
86	Correct	422 ms	38440 KB	Output is correct
87	Correct	441 ms	38320 KB	Output is correct

답안 #394757

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