oj.uz

Submission #533815

# Submission time Handle Problem Language Result Execution time Memory
533815 2022-03-07T11:07:49 Z groshi Network (BOI15_net) C++17
100 / 100
 359 ms 47672 KB 
#include<iostream>
#include<vector>
using namespace std;
struct wi{
    vector<int> Q;
}*w;
vector<int> mam;
void dfs(int x,int ojc)
{
    if(w[x].Q.size()==1)
        mam.push_back(x);
    for(int i=0;i<w[x].Q.size();i++)
    {
        int pom=w[x].Q[i];
        if(pom==ojc)
            continue;
        dfs(pom,x);
    }
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,x,y;
    cin>>n;
    w=new wi[n+3];
    for(int i=1;i<n;i++)
    {
        cin>>x>>y;
        w[x].Q.push_back(y);
        w[y].Q.push_back(x);
    }
    for(int i=1;i<=n;i++)
    {
        if(w[i].Q.size()>1)
        {
            dfs(i,0);
            break;
        }
    }
    cout<<(mam.size()+1)/2<<"\n";
    for(int i=0;i<(mam.size()+1)/2;i++)
        cout<<mam[i]<<" "<<mam[i+mam.size()/2]<<"\n";
    return 0;
}

Compilation message

net.cpp: In function 'void dfs(int, int)':
net.cpp:12:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     for(int i=0;i<w[x].Q.size();i++)
      |                 ~^~~~~~~~~~~~~~
net.cpp: In function 'int main()':
net.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for(int i=0;i<(mam.size()+1)/2;i++)
      |                 ~^~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 312 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 308 KB Output is correct
6 Correct 0 ms 312 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 312 KB Output is correct
15 Correct 1 ms 260 KB Output is correct
16 Correct 1 ms 308 KB Output is correct
17 Correct 1 ms 308 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 312 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 308 KB Output is correct
6 Correct 0 ms 312 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 312 KB Output is correct
15 Correct 1 ms 260 KB Output is correct
16 Correct 1 ms 308 KB Output is correct
17 Correct 1 ms 308 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 308 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 1 ms 460 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 1 ms 460 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 312 KB Output is correct
31 Correct 1 ms 460 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 1 ms 204 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 1 ms 332 KB Output is correct
39 Correct 1 ms 316 KB Output is correct
40 Correct 1 ms 316 KB Output is correct
41 Correct 0 ms 316 KB Output is correct
42 Correct 1 ms 312 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 1 ms 308 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 1 ms 204 KB Output is correct
51 Correct 1 ms 204 KB Output is correct
52 Correct 1 ms 316 KB Output is correct
53 Correct 1 ms 332 KB Output is correct
54 Correct 1 ms 204 KB Output is correct
55 Correct 1 ms 332 KB Output is correct
56 Correct 1 ms 204 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 460 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 312 KB Output is correct
2 Correct 1 ms 312 KB Output is correct
3 Correct 1 ms 316 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 308 KB Output is correct
6 Correct 0 ms 312 KB Output is correct
7 Correct 1 ms 304 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 312 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 308 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 312 KB Output is correct
15 Correct 1 ms 260 KB Output is correct
16 Correct 1 ms 308 KB Output is correct
17 Correct 1 ms 308 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 308 KB Output is correct
22 Correct 1 ms 460 KB Output is correct
23 Correct 1 ms 460 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 1 ms 332 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 1 ms 460 KB Output is correct
29 Correct 1 ms 332 KB Output is correct
30 Correct 1 ms 312 KB Output is correct
31 Correct 1 ms 460 KB Output is correct
32 Correct 0 ms 204 KB Output is correct
33 Correct 1 ms 204 KB Output is correct
34 Correct 1 ms 204 KB Output is correct
35 Correct 1 ms 204 KB Output is correct
36 Correct 1 ms 204 KB Output is correct
37 Correct 1 ms 332 KB Output is correct
38 Correct 1 ms 332 KB Output is correct
39 Correct 1 ms 316 KB Output is correct
40 Correct 1 ms 316 KB Output is correct
41 Correct 0 ms 316 KB Output is correct
42 Correct 1 ms 312 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 1 ms 308 KB Output is correct
45 Correct 1 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 1 ms 204 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 1 ms 332 KB Output is correct
50 Correct 1 ms 204 KB Output is correct
51 Correct 1 ms 204 KB Output is correct
52 Correct 1 ms 316 KB Output is correct
53 Correct 1 ms 332 KB Output is correct
54 Correct 1 ms 204 KB Output is correct
55 Correct 1 ms 332 KB Output is correct
56 Correct 1 ms 204 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 460 KB Output is correct
59 Correct 259 ms 34860 KB Output is correct
60 Correct 307 ms 38716 KB Output is correct
61 Correct 0 ms 204 KB Output is correct
62 Correct 0 ms 204 KB Output is correct
63 Correct 232 ms 31408 KB Output is correct
64 Correct 2 ms 844 KB Output is correct
65 Correct 11 ms 2764 KB Output is correct
66 Correct 102 ms 20352 KB Output is correct
67 Correct 359 ms 47020 KB Output is correct
68 Correct 359 ms 47672 KB Output is correct
69 Correct 5 ms 1484 KB Output is correct
70 Correct 61 ms 13280 KB Output is correct
71 Correct 219 ms 41896 KB Output is correct
72 Correct 228 ms 40608 KB Output is correct
73 Correct 63 ms 10504 KB Output is correct
74 Correct 308 ms 37668 KB Output is correct
75 Correct 23 ms 4792 KB Output is correct
76 Correct 211 ms 41500 KB Output is correct
77 Correct 205 ms 41600 KB Output is correct
78 Correct 19 ms 5052 KB Output is correct
79 Correct 357 ms 45116 KB Output is correct
80 Correct 2 ms 584 KB Output is correct
81 Correct 87 ms 13524 KB Output is correct
82 Correct 260 ms 39552 KB Output is correct
83 Correct 311 ms 37684 KB Output is correct
84 Correct 320 ms 37632 KB Output is correct
85 Correct 319 ms 37700 KB Output is correct
86 Correct 312 ms 38720 KB Output is correct
87 Correct 330 ms 38712 KB Output is correct