oj.uz

답안 #939078

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
939078 2024-03-06T05:24:00 Z ezzzay Network (BOI15_net) C++14
100 / 100
 650 ms 58084 KB 
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
const int N=5e5+5;
bool vis[N];
vector<int>v[N];
vector<pair<int,int>>rts;
vector<int>vec;
void dfs(int a, int p=-1){
    if(v[a].size()==1)vec.pb(a);
    for(auto b:v[a]){
        if(b!=p){
            dfs(b,a);
        }
    }
}
signed main(){
    int n;
    cin>>n;
    for(int i=1;i<n;i++){
        int a,b;
        cin>>a>>b;
        v[a].pb(b);
        v[b].pb(a);
        rts.pb({a,b});
    }
    dfs(1);
    
    
    cout<<vec.size()/2+vec.size()%2<<endl;
    for(int i=0;i<(vec.size()+1)/2;i++){
        cout<<vec[i]<<" "<<vec[i+vec.size()/2]<<endl;
    }
    
}

Compilation message

net.cpp: In function 'int main()':
net.cpp:34:18: 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]
   34 |     for(int i=0;i<(vec.size()+1)/2;i++){
      |                 ~^~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 12120 KB Output is correct
2 Correct 3 ms 12124 KB Output is correct
3 Correct 3 ms 12120 KB Output is correct
4 Correct 3 ms 12124 KB Output is correct
5 Correct 3 ms 12124 KB Output is correct
6 Correct 3 ms 12124 KB Output is correct
7 Correct 3 ms 12124 KB Output is correct
8 Correct 3 ms 12124 KB Output is correct
9 Correct 3 ms 12124 KB Output is correct
10 Correct 3 ms 12124 KB Output is correct
11 Correct 3 ms 12124 KB Output is correct
12 Correct 3 ms 12124 KB Output is correct
13 Correct 3 ms 12124 KB Output is correct
14 Correct 3 ms 12120 KB Output is correct
15 Correct 3 ms 12124 KB Output is correct
16 Correct 3 ms 12124 KB Output is correct
17 Correct 3 ms 12124 KB Output is correct
18 Correct 3 ms 12124 KB Output is correct
19 Correct 3 ms 12124 KB Output is correct
20 Correct 3 ms 12124 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 3 ms 12124 KB Output is correct
3 Correct 3 ms 12120 KB Output is correct
4 Correct 3 ms 12124 KB Output is correct
5 Correct 3 ms 12124 KB Output is correct
6 Correct 3 ms 12124 KB Output is correct
7 Correct 3 ms 12124 KB Output is correct
8 Correct 3 ms 12124 KB Output is correct
9 Correct 3 ms 12124 KB Output is correct
10 Correct 3 ms 12124 KB Output is correct
11 Correct 3 ms 12124 KB Output is correct
12 Correct 3 ms 12124 KB Output is correct
13 Correct 3 ms 12124 KB Output is correct
14 Correct 3 ms 12120 KB Output is correct
15 Correct 3 ms 12124 KB Output is correct
16 Correct 3 ms 12124 KB Output is correct
17 Correct 3 ms 12124 KB Output is correct
18 Correct 3 ms 12124 KB Output is correct
19 Correct 3 ms 12124 KB Output is correct
20 Correct 3 ms 12124 KB Output is correct
21 Correct 3 ms 12120 KB Output is correct
22 Correct 5 ms 12124 KB Output is correct
23 Correct 5 ms 12124 KB Output is correct
24 Correct 5 ms 12332 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 4 ms 12260 KB Output is correct
29 Correct 4 ms 12120 KB Output is correct
30 Correct 3 ms 12120 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 12124 KB Output is correct
36 Correct 3 ms 12120 KB Output is correct
37 Correct 3 ms 12124 KB Output is correct
38 Correct 3 ms 12124 KB Output is correct
39 Correct 3 ms 12124 KB Output is correct
40 Correct 3 ms 12124 KB Output is correct
41 Correct 3 ms 12124 KB Output is correct
42 Correct 3 ms 12124 KB Output is correct
43 Correct 4 ms 12124 KB Output is correct
44 Correct 3 ms 12136 KB Output is correct
45 Correct 3 ms 12124 KB Output is correct
46 Correct 3 ms 12124 KB Output is correct
47 Correct 3 ms 12124 KB Output is correct
48 Correct 3 ms 12140 KB Output is correct
49 Correct 5 ms 12124 KB Output is correct
50 Correct 3 ms 12124 KB Output is correct
51 Correct 3 ms 12124 KB Output is correct
52 Correct 3 ms 12124 KB Output is correct
53 Correct 5 ms 12124 KB Output is correct
54 Correct 3 ms 12124 KB Output is correct
55 Correct 3 ms 12124 KB Output is correct
56 Correct 3 ms 12124 KB Output is correct
57 Correct 4 ms 12124 KB Output is correct
58 Correct 5 ms 12124 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 3 ms 12124 KB Output is correct
3 Correct 3 ms 12120 KB Output is correct
4 Correct 3 ms 12124 KB Output is correct
5 Correct 3 ms 12124 KB Output is correct
6 Correct 3 ms 12124 KB Output is correct
7 Correct 3 ms 12124 KB Output is correct
8 Correct 3 ms 12124 KB Output is correct
9 Correct 3 ms 12124 KB Output is correct
10 Correct 3 ms 12124 KB Output is correct
11 Correct 3 ms 12124 KB Output is correct
12 Correct 3 ms 12124 KB Output is correct
13 Correct 3 ms 12124 KB Output is correct
14 Correct 3 ms 12120 KB Output is correct
15 Correct 3 ms 12124 KB Output is correct
16 Correct 3 ms 12124 KB Output is correct
17 Correct 3 ms 12124 KB Output is correct
18 Correct 3 ms 12124 KB Output is correct
19 Correct 3 ms 12124 KB Output is correct
20 Correct 3 ms 12124 KB Output is correct
21 Correct 3 ms 12120 KB Output is correct
22 Correct 5 ms 12124 KB Output is correct
23 Correct 5 ms 12124 KB Output is correct
24 Correct 5 ms 12332 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 4 ms 12260 KB Output is correct
29 Correct 4 ms 12120 KB Output is correct
30 Correct 3 ms 12120 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 12124 KB Output is correct
36 Correct 3 ms 12120 KB Output is correct
37 Correct 3 ms 12124 KB Output is correct
38 Correct 3 ms 12124 KB Output is correct
39 Correct 3 ms 12124 KB Output is correct
40 Correct 3 ms 12124 KB Output is correct
41 Correct 3 ms 12124 KB Output is correct
42 Correct 3 ms 12124 KB Output is correct
43 Correct 4 ms 12124 KB Output is correct
44 Correct 3 ms 12136 KB Output is correct
45 Correct 3 ms 12124 KB Output is correct
46 Correct 3 ms 12124 KB Output is correct
47 Correct 3 ms 12124 KB Output is correct
48 Correct 3 ms 12140 KB Output is correct
49 Correct 5 ms 12124 KB Output is correct
50 Correct 3 ms 12124 KB Output is correct
51 Correct 3 ms 12124 KB Output is correct
52 Correct 3 ms 12124 KB Output is correct
53 Correct 5 ms 12124 KB Output is correct
54 Correct 3 ms 12124 KB Output is correct
55 Correct 3 ms 12124 KB Output is correct
56 Correct 3 ms 12124 KB Output is correct
57 Correct 4 ms 12124 KB Output is correct
58 Correct 5 ms 12124 KB Output is correct
59 Correct 559 ms 54028 KB Output is correct
60 Correct 650 ms 55272 KB Output is correct
61 Correct 3 ms 12124 KB Output is correct
62 Correct 3 ms 12180 KB Output is correct
63 Correct 461 ms 47064 KB Output is correct
64 Correct 5 ms 12832 KB Output is correct
65 Correct 16 ms 14408 KB Output is correct
66 Correct 117 ms 30744 KB Output is correct
67 Correct 506 ms 54956 KB Output is correct
68 Correct 500 ms 56840 KB Output is correct
69 Correct 21 ms 13272 KB Output is correct
70 Correct 192 ms 27784 KB Output is correct
71 Correct 598 ms 58084 KB Output is correct
72 Correct 609 ms 56592 KB Output is correct
73 Correct 142 ms 24052 KB Output is correct
74 Correct 580 ms 50824 KB Output is correct
75 Correct 60 ms 16952 KB Output is correct
76 Correct 620 ms 57196 KB Output is correct
77 Correct 635 ms 57488 KB Output is correct
78 Correct 44 ms 16576 KB Output is correct
79 Correct 465 ms 53064 KB Output is correct
80 Correct 7 ms 12376 KB Output is correct
81 Correct 181 ms 26948 KB Output is correct
82 Correct 608 ms 56244 KB Output is correct
83 Correct 571 ms 50900 KB Output is correct
84 Correct 591 ms 51244 KB Output is correct
85 Correct 557 ms 51068 KB Output is correct
86 Correct 593 ms 55212 KB Output is correct
87 Correct 579 ms 56516 KB Output is correct