답안 #765395

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
765395	2023-06-24T12:11:39 Z	vjudge1	Network (BOI15_net)	C++17	100 / 100	362 ms	52380 KB

/**
  * Author: Amirrrr
  * Created: 24.06.2023
  * Why am I so stupid? :c
  * Slishkom slab
**/

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

#define ll long long
#define pb push_back
#define all(x) x.begin(), x.end()
#define FF first
#define SS second
#define ent "\n"
#define int long long

const int N = 5e5 + 13;
const int MOD = 1e9 + 7;
const int INF = 1e18;
const int maxn = 1e6 + 12;

int n,x,y,used[N];
vector<int>g[N],ord;

void dfs(int v){
    used[v]=1;
    if(g[v].size()==1){
        ord.pb(v);
    }
    for(auto to:g[v]){
        if(!used[to]){
            dfs(to);
        }
    }
}

void gogo (){
    cin>>n;
    for(int i=1;i<n;i++){
        int x,y;cin>>x>>y;
        g[x].pb(y),g[y].pb(x);
    }
    dfs(1);
    cout<<(ord.size()+1)/2<<ent;
    for(int i=0;i<ord.size()/2;i++){
        cout<<ord[i]<<' '<<ord[i+ord.size()/2]<<ent;
    }
    if(ord.size()%2){
        cout<<ord.back()<<' '<<ord[0]<<ent;
    }
}

signed main (/*Amir Mirmanov*/){
    ios_base::sync_with_stdio(0),cin.tie(0);
    int Q=1,test=1;
    //freopen("rain.in","r",stdin);
	//freopen("rain.out","w",stdout);
    //cin>>Q;
    while (Q --){
        gogo();
    }
    return 0;
}

Compilation message

net.cpp: In function 'void gogo()':
net.cpp:47:18: 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]
   47 |     for(int i=0;i<ord.size()/2;i++){
      |                 ~^~~~~~~~~~~~~
net.cpp: In function 'int main()':
net.cpp:57:13: warning: unused variable 'test' [-Wunused-variable]
   57 |     int Q=1,test=1;
      |             ^~~~

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	11988 KB	Output is correct
2	Correct	6 ms	11988 KB	Output is correct
3	Correct	6 ms	11988 KB	Output is correct
4	Correct	5 ms	12072 KB	Output is correct
5	Correct	6 ms	11988 KB	Output is correct
6	Correct	6 ms	11988 KB	Output is correct
7	Correct	6 ms	11988 KB	Output is correct
8	Correct	5 ms	11988 KB	Output is correct
9	Correct	7 ms	12116 KB	Output is correct
10	Correct	6 ms	11988 KB	Output is correct
11	Correct	6 ms	11988 KB	Output is correct
12	Correct	6 ms	12044 KB	Output is correct
13	Correct	5 ms	11988 KB	Output is correct
14	Correct	5 ms	11988 KB	Output is correct
15	Correct	5 ms	11988 KB	Output is correct
16	Correct	5 ms	11988 KB	Output is correct
17	Correct	5 ms	11988 KB	Output is correct
18	Correct	5 ms	11988 KB	Output is correct
19	Correct	6 ms	11988 KB	Output is correct
20	Correct	5 ms	11988 KB	Output is correct

Subtask #2
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	11988 KB	Output is correct
2	Correct	6 ms	11988 KB	Output is correct
3	Correct	6 ms	11988 KB	Output is correct
4	Correct	5 ms	12072 KB	Output is correct
5	Correct	6 ms	11988 KB	Output is correct
6	Correct	6 ms	11988 KB	Output is correct
7	Correct	6 ms	11988 KB	Output is correct
8	Correct	5 ms	11988 KB	Output is correct
9	Correct	7 ms	12116 KB	Output is correct
10	Correct	6 ms	11988 KB	Output is correct
11	Correct	6 ms	11988 KB	Output is correct
12	Correct	6 ms	12044 KB	Output is correct
13	Correct	5 ms	11988 KB	Output is correct
14	Correct	5 ms	11988 KB	Output is correct
15	Correct	5 ms	11988 KB	Output is correct
16	Correct	5 ms	11988 KB	Output is correct
17	Correct	5 ms	11988 KB	Output is correct
18	Correct	5 ms	11988 KB	Output is correct
19	Correct	6 ms	11988 KB	Output is correct
20	Correct	5 ms	11988 KB	Output is correct
21	Correct	5 ms	11988 KB	Output is correct
22	Correct	6 ms	12116 KB	Output is correct
23	Correct	7 ms	12116 KB	Output is correct
24	Correct	6 ms	12116 KB	Output is correct
25	Correct	8 ms	12116 KB	Output is correct
26	Correct	6 ms	12080 KB	Output is correct
27	Correct	6 ms	12116 KB	Output is correct
28	Correct	6 ms	12116 KB	Output is correct
29	Correct	6 ms	12116 KB	Output is correct
30	Correct	5 ms	11988 KB	Output is correct
31	Correct	6 ms	12116 KB	Output is correct
32	Correct	6 ms	11988 KB	Output is correct
33	Correct	6 ms	11988 KB	Output is correct
34	Correct	6 ms	11988 KB	Output is correct
35	Correct	6 ms	11988 KB	Output is correct
36	Correct	6 ms	11988 KB	Output is correct
37	Correct	6 ms	11988 KB	Output is correct
38	Correct	6 ms	12116 KB	Output is correct
39	Correct	6 ms	11988 KB	Output is correct
40	Correct	6 ms	11968 KB	Output is correct
41	Correct	5 ms	12068 KB	Output is correct
42	Correct	6 ms	11988 KB	Output is correct
43	Correct	6 ms	12116 KB	Output is correct
44	Correct	6 ms	11988 KB	Output is correct
45	Correct	6 ms	11988 KB	Output is correct
46	Correct	6 ms	12116 KB	Output is correct
47	Correct	7 ms	11956 KB	Output is correct
48	Correct	6 ms	11988 KB	Output is correct
49	Correct	7 ms	12116 KB	Output is correct
50	Correct	6 ms	11988 KB	Output is correct
51	Correct	6 ms	11988 KB	Output is correct
52	Correct	6 ms	11988 KB	Output is correct
53	Correct	9 ms	12244 KB	Output is correct
54	Correct	6 ms	11988 KB	Output is correct
55	Correct	6 ms	12080 KB	Output is correct
56	Correct	6 ms	12076 KB	Output is correct
57	Correct	6 ms	11988 KB	Output is correct
58	Correct	7 ms	12116 KB	Output is correct

Subtask #3
37.0 / 37.0

#	결과	실행 시간	메모리	Grader output
1	Correct	7 ms	11988 KB	Output is correct
2	Correct	6 ms	11988 KB	Output is correct
3	Correct	6 ms	11988 KB	Output is correct
4	Correct	5 ms	12072 KB	Output is correct
5	Correct	6 ms	11988 KB	Output is correct
6	Correct	6 ms	11988 KB	Output is correct
7	Correct	6 ms	11988 KB	Output is correct
8	Correct	5 ms	11988 KB	Output is correct
9	Correct	7 ms	12116 KB	Output is correct
10	Correct	6 ms	11988 KB	Output is correct
11	Correct	6 ms	11988 KB	Output is correct
12	Correct	6 ms	12044 KB	Output is correct
13	Correct	5 ms	11988 KB	Output is correct
14	Correct	5 ms	11988 KB	Output is correct
15	Correct	5 ms	11988 KB	Output is correct
16	Correct	5 ms	11988 KB	Output is correct
17	Correct	5 ms	11988 KB	Output is correct
18	Correct	5 ms	11988 KB	Output is correct
19	Correct	6 ms	11988 KB	Output is correct
20	Correct	5 ms	11988 KB	Output is correct
21	Correct	5 ms	11988 KB	Output is correct
22	Correct	6 ms	12116 KB	Output is correct
23	Correct	7 ms	12116 KB	Output is correct
24	Correct	6 ms	12116 KB	Output is correct
25	Correct	8 ms	12116 KB	Output is correct
26	Correct	6 ms	12080 KB	Output is correct
27	Correct	6 ms	12116 KB	Output is correct
28	Correct	6 ms	12116 KB	Output is correct
29	Correct	6 ms	12116 KB	Output is correct
30	Correct	5 ms	11988 KB	Output is correct
31	Correct	6 ms	12116 KB	Output is correct
32	Correct	6 ms	11988 KB	Output is correct
33	Correct	6 ms	11988 KB	Output is correct
34	Correct	6 ms	11988 KB	Output is correct
35	Correct	6 ms	11988 KB	Output is correct
36	Correct	6 ms	11988 KB	Output is correct
37	Correct	6 ms	11988 KB	Output is correct
38	Correct	6 ms	12116 KB	Output is correct
39	Correct	6 ms	11988 KB	Output is correct
40	Correct	6 ms	11968 KB	Output is correct
41	Correct	5 ms	12068 KB	Output is correct
42	Correct	6 ms	11988 KB	Output is correct
43	Correct	6 ms	12116 KB	Output is correct
44	Correct	6 ms	11988 KB	Output is correct
45	Correct	6 ms	11988 KB	Output is correct
46	Correct	6 ms	12116 KB	Output is correct
47	Correct	7 ms	11956 KB	Output is correct
48	Correct	6 ms	11988 KB	Output is correct
49	Correct	7 ms	12116 KB	Output is correct
50	Correct	6 ms	11988 KB	Output is correct
51	Correct	6 ms	11988 KB	Output is correct
52	Correct	6 ms	11988 KB	Output is correct
53	Correct	9 ms	12244 KB	Output is correct
54	Correct	6 ms	11988 KB	Output is correct
55	Correct	6 ms	12080 KB	Output is correct
56	Correct	6 ms	12076 KB	Output is correct
57	Correct	6 ms	11988 KB	Output is correct
58	Correct	7 ms	12116 KB	Output is correct
59	Correct	228 ms	44016 KB	Output is correct
60	Correct	362 ms	47216 KB	Output is correct
61	Correct	7 ms	11988 KB	Output is correct
62	Correct	6 ms	11988 KB	Output is correct
63	Correct	210 ms	39864 KB	Output is correct
64	Correct	8 ms	12464 KB	Output is correct
65	Correct	13 ms	14164 KB	Output is correct
66	Correct	77 ms	29304 KB	Output is correct
67	Correct	362 ms	50804 KB	Output is correct
68	Correct	344 ms	52380 KB	Output is correct
69	Correct	10 ms	13140 KB	Output is correct
70	Correct	60 ms	24484 KB	Output is correct
71	Correct	191 ms	49708 KB	Output is correct
72	Correct	222 ms	48124 KB	Output is correct
73	Correct	73 ms	21164 KB	Output is correct
74	Correct	296 ms	45008 KB	Output is correct
75	Correct	21 ms	16068 KB	Output is correct
76	Correct	205 ms	49232 KB	Output is correct
77	Correct	192 ms	49400 KB	Output is correct
78	Correct	29 ms	16076 KB	Output is correct
79	Correct	338 ms	49072 KB	Output is correct
80	Correct	7 ms	12372 KB	Output is correct
81	Correct	62 ms	23812 KB	Output is correct
82	Correct	267 ms	47064 KB	Output is correct
83	Correct	285 ms	45000 KB	Output is correct
84	Correct	280 ms	45028 KB	Output is correct
85	Correct	302 ms	45012 KB	Output is correct
86	Correct	293 ms	47332 KB	Output is correct
87	Correct	293 ms	47312 KB	Output is correct

답안 #765395

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