답안 #824330

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
824330	2023-08-14T02:44:30 Z	irmuun	Network (BOI15_net)	C++17	100 / 100	359 ms	70976 KB

#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    ll n;
    cin>>n;
    vector<ll>adj[n+1];
    for(ll i=1;i<n;i++){
        ll a,b;
        cin>>a>>b;
        adj[a].pb(b);
        adj[b].pb(a);
    }
    ll mx=0,ind;
    for(ll i=1;i<=n;i++){
        if(adj[i].size()>mx){
            mx=adj[i].size();
            ind=i;
        }
    }
    vector<ll>ord;
    function <void(ll,ll)> dfs=[&](ll x,ll p){
        if(adj[x].size()==1){
            ord.pb(x);
        }
        for(auto y:adj[x]){
            if(y!=p){
                dfs(y,x);
            }
        }
    };
    for(auto x:adj[ind]){
        dfs(x,ind);
    }
    if(ord.size()%2==1){
        ord.pb(ord[0]);
    }
    ll sz=ord.size();
    cout<<sz/2<<"\n";
    for(ll i=0;i<sz/2;i++){
        cout<<ord[i]<<' '<<ord[i+sz/2]<<"\n";
    }
}

Compilation message

net.cpp: In function 'int main()':
net.cpp:25:25: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   25 |         if(adj[i].size()>mx){
      |            ~~~~~~~~~~~~~^~~
net.cpp:23:13: warning: 'ind' may be used uninitialized in this function [-Wmaybe-uninitialized]
   23 |     ll mx=0,ind;
      |             ^~~

Subtask #1
18.0 / 18.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	324 KB	Output is correct
6	Correct	0 ms	320 KB	Output is correct
7	Correct	0 ms	316 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	320 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	0 ms	276 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	1 ms	316 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	1 ms	212 KB	Output is correct
19	Correct	1 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct

Subtask #2
45.0 / 45.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	324 KB	Output is correct
6	Correct	0 ms	320 KB	Output is correct
7	Correct	0 ms	316 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	320 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	0 ms	276 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	1 ms	316 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	1 ms	212 KB	Output is correct
19	Correct	1 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	0 ms	212 KB	Output is correct
22	Correct	1 ms	456 KB	Output is correct
23	Correct	1 ms	468 KB	Output is correct
24	Correct	1 ms	468 KB	Output is correct
25	Correct	1 ms	468 KB	Output is correct
26	Correct	1 ms	328 KB	Output is correct
27	Correct	1 ms	468 KB	Output is correct
28	Correct	1 ms	468 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	0 ms	212 KB	Output is correct
31	Correct	1 ms	468 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	316 KB	Output is correct
37	Correct	1 ms	320 KB	Output is correct
38	Correct	1 ms	324 KB	Output is correct
39	Correct	1 ms	212 KB	Output is correct
40	Correct	0 ms	212 KB	Output is correct
41	Correct	1 ms	212 KB	Output is correct
42	Correct	1 ms	320 KB	Output is correct
43	Correct	1 ms	340 KB	Output is correct
44	Correct	0 ms	212 KB	Output is correct
45	Correct	1 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	0 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	1 ms	340 KB	Output is correct
53	Correct	1 ms	340 KB	Output is correct
54	Correct	1 ms	212 KB	Output is correct
55	Correct	1 ms	320 KB	Output is correct
56	Correct	1 ms	212 KB	Output is correct
57	Correct	1 ms	340 KB	Output is correct
58	Correct	1 ms	460 KB	Output is correct

Subtask #3
37.0 / 37.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	212 KB	Output is correct
2	Correct	0 ms	212 KB	Output is correct
3	Correct	1 ms	212 KB	Output is correct
4	Correct	0 ms	212 KB	Output is correct
5	Correct	1 ms	324 KB	Output is correct
6	Correct	0 ms	320 KB	Output is correct
7	Correct	0 ms	316 KB	Output is correct
8	Correct	0 ms	212 KB	Output is correct
9	Correct	0 ms	212 KB	Output is correct
10	Correct	1 ms	320 KB	Output is correct
11	Correct	1 ms	212 KB	Output is correct
12	Correct	0 ms	276 KB	Output is correct
13	Correct	0 ms	212 KB	Output is correct
14	Correct	0 ms	212 KB	Output is correct
15	Correct	1 ms	316 KB	Output is correct
16	Correct	0 ms	212 KB	Output is correct
17	Correct	0 ms	212 KB	Output is correct
18	Correct	1 ms	212 KB	Output is correct
19	Correct	1 ms	212 KB	Output is correct
20	Correct	0 ms	212 KB	Output is correct
21	Correct	0 ms	212 KB	Output is correct
22	Correct	1 ms	456 KB	Output is correct
23	Correct	1 ms	468 KB	Output is correct
24	Correct	1 ms	468 KB	Output is correct
25	Correct	1 ms	468 KB	Output is correct
26	Correct	1 ms	328 KB	Output is correct
27	Correct	1 ms	468 KB	Output is correct
28	Correct	1 ms	468 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	0 ms	212 KB	Output is correct
31	Correct	1 ms	468 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	316 KB	Output is correct
37	Correct	1 ms	320 KB	Output is correct
38	Correct	1 ms	324 KB	Output is correct
39	Correct	1 ms	212 KB	Output is correct
40	Correct	0 ms	212 KB	Output is correct
41	Correct	1 ms	212 KB	Output is correct
42	Correct	1 ms	320 KB	Output is correct
43	Correct	1 ms	340 KB	Output is correct
44	Correct	0 ms	212 KB	Output is correct
45	Correct	1 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	0 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	1 ms	340 KB	Output is correct
53	Correct	1 ms	340 KB	Output is correct
54	Correct	1 ms	212 KB	Output is correct
55	Correct	1 ms	320 KB	Output is correct
56	Correct	1 ms	212 KB	Output is correct
57	Correct	1 ms	340 KB	Output is correct
58	Correct	1 ms	460 KB	Output is correct
59	Correct	262 ms	39452 KB	Output is correct
60	Correct	307 ms	43444 KB	Output is correct
61	Correct	0 ms	212 KB	Output is correct
62	Correct	0 ms	212 KB	Output is correct
63	Correct	254 ms	34316 KB	Output is correct
64	Correct	2 ms	852 KB	Output is correct
65	Correct	7 ms	2892 KB	Output is correct
66	Correct	67 ms	20740 KB	Output is correct
67	Correct	344 ms	55372 KB	Output is correct
68	Correct	359 ms	70976 KB	Output is correct
69	Correct	4 ms	1620 KB	Output is correct
70	Correct	48 ms	15248 KB	Output is correct
71	Correct	193 ms	45712 KB	Output is correct
72	Correct	227 ms	44256 KB	Output is correct
73	Correct	47 ms	11580 KB	Output is correct
74	Correct	297 ms	41248 KB	Output is correct
75	Correct	15 ms	5156 KB	Output is correct
76	Correct	262 ms	45284 KB	Output is correct
77	Correct	200 ms	45572 KB	Output is correct
78	Correct	17 ms	6228 KB	Output is correct
79	Correct	321 ms	47368 KB	Output is correct
80	Correct	1 ms	596 KB	Output is correct
81	Correct	60 ms	14764 KB	Output is correct
82	Correct	262 ms	43160 KB	Output is correct
83	Correct	301 ms	41120 KB	Output is correct
84	Correct	334 ms	41168 KB	Output is correct
85	Correct	331 ms	41172 KB	Output is correct
86	Correct	320 ms	43372 KB	Output is correct
87	Correct	311 ms	43352 KB	Output is correct

답안 #824330

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