oj.uz

Submission #151229

# Submission time Handle Problem Language Result Execution time Memory
151229 2019-09-02T09:26:52 Z Charis02 Network (BOI15_net) C++14
100 / 100
 578 ms 48664 KB 
#include<iostream>
#include<stdio.h>
#include<vector>
#include<cmath>
#include<queue>
#include<string.h>
#include<map>
#include<set>
#include<algorithm>
#define ll long long
#define pi pair < ll,ll >
#define mp(a,b) make_pair(a,b)
#define rep(i,a,b) for(int i = a;i < b;i++)
#define N 500004
#define INF 1e9+7

using namespace std;

ll n,a,b;
vector < vector < ll > > graph(N);
vector < ll > res;

void dfs(ll cur,ll par)
{
    if(graph[cur].size() == 1)
    {
        res.push_back(cur);
    }

    rep(i,0,graph[cur].size())
    {
        if(graph[cur][i] == par)
            continue;

        dfs(graph[cur][i],cur);
    }

    return;
}

int main()
{
    ios_base::sync_with_stdio(false);

    cin >> n;

    rep(i,0,n-1)
    {
        cin >> a >> b;
        graph[a].push_back(b);
        graph[b].push_back(a);
    }

    dfs(1,1);
    ll half = res.size()/2 + res.size()%2;
    ll sz = res.size();

    cout << half << endl;

    rep(i,0,half)
    {
        cout << res[i] << " "<< res[(i+half)%sz] << "\n";
    }

    return 0;
}

Compilation message

net.cpp: In function 'void dfs(long long int, long long int)':
net.cpp:13:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define rep(i,a,b) for(int i = a;i < b;i++)
net.cpp:30:9:
     rep(i,0,graph[cur].size())
         ~~~~~~~~~~~~~~~~~~~~~       
net.cpp:30:5: note: in expansion of macro 'rep'
     rep(i,0,graph[cur].size())
     ^~~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12024 KB Output is correct
2 Correct 12 ms 12152 KB Output is correct
3 Correct 12 ms 12024 KB Output is correct
4 Correct 13 ms 12152 KB Output is correct
5 Correct 15 ms 12024 KB Output is correct
6 Correct 12 ms 12024 KB Output is correct
7 Correct 13 ms 12124 KB Output is correct
8 Correct 12 ms 12152 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 13 ms 12152 KB Output is correct
11 Correct 12 ms 12152 KB Output is correct
12 Correct 12 ms 12152 KB Output is correct
13 Correct 12 ms 12156 KB Output is correct
14 Correct 14 ms 12132 KB Output is correct
15 Correct 13 ms 12024 KB Output is correct
16 Correct 14 ms 12024 KB Output is correct
17 Correct 12 ms 12152 KB Output is correct
18 Correct 14 ms 12020 KB Output is correct
19 Correct 12 ms 12152 KB Output is correct
20 Correct 16 ms 12024 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12024 KB Output is correct
2 Correct 12 ms 12152 KB Output is correct
3 Correct 12 ms 12024 KB Output is correct
4 Correct 13 ms 12152 KB Output is correct
5 Correct 15 ms 12024 KB Output is correct
6 Correct 12 ms 12024 KB Output is correct
7 Correct 13 ms 12124 KB Output is correct
8 Correct 12 ms 12152 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 13 ms 12152 KB Output is correct
11 Correct 12 ms 12152 KB Output is correct
12 Correct 12 ms 12152 KB Output is correct
13 Correct 12 ms 12156 KB Output is correct
14 Correct 14 ms 12132 KB Output is correct
15 Correct 13 ms 12024 KB Output is correct
16 Correct 14 ms 12024 KB Output is correct
17 Correct 12 ms 12152 KB Output is correct
18 Correct 14 ms 12020 KB Output is correct
19 Correct 12 ms 12152 KB Output is correct
20 Correct 16 ms 12024 KB Output is correct
21 Correct 12 ms 12280 KB Output is correct
22 Correct 13 ms 12280 KB Output is correct
23 Correct 13 ms 12252 KB Output is correct
24 Correct 13 ms 12280 KB Output is correct
25 Correct 13 ms 12152 KB Output is correct
26 Correct 13 ms 12156 KB Output is correct
27 Correct 13 ms 12152 KB Output is correct
28 Correct 13 ms 12152 KB Output is correct
29 Correct 13 ms 12152 KB Output is correct
30 Correct 12 ms 12024 KB Output is correct
31 Correct 13 ms 12280 KB Output is correct
32 Correct 12 ms 12152 KB Output is correct
33 Correct 12 ms 12024 KB Output is correct
34 Correct 12 ms 12024 KB Output is correct
35 Correct 12 ms 12156 KB Output is correct
36 Correct 12 ms 12152 KB Output is correct
37 Correct 12 ms 12152 KB Output is correct
38 Correct 13 ms 12152 KB Output is correct
39 Correct 12 ms 12152 KB Output is correct
40 Correct 13 ms 12152 KB Output is correct
41 Correct 12 ms 12024 KB Output is correct
42 Correct 13 ms 12152 KB Output is correct
43 Correct 13 ms 12152 KB Output is correct
44 Correct 12 ms 12024 KB Output is correct
45 Correct 13 ms 12152 KB Output is correct
46 Correct 13 ms 12152 KB Output is correct
47 Correct 12 ms 12152 KB Output is correct
48 Correct 12 ms 12152 KB Output is correct
49 Correct 12 ms 12152 KB Output is correct
50 Correct 12 ms 12024 KB Output is correct
51 Correct 13 ms 12072 KB Output is correct
52 Correct 12 ms 12028 KB Output is correct
53 Correct 12 ms 12152 KB Output is correct
54 Correct 12 ms 12024 KB Output is correct
55 Correct 12 ms 12152 KB Output is correct
56 Correct 12 ms 12152 KB Output is correct
57 Correct 12 ms 12152 KB Output is correct
58 Correct 13 ms 12152 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 12024 KB Output is correct
2 Correct 12 ms 12152 KB Output is correct
3 Correct 12 ms 12024 KB Output is correct
4 Correct 13 ms 12152 KB Output is correct
5 Correct 15 ms 12024 KB Output is correct
6 Correct 12 ms 12024 KB Output is correct
7 Correct 13 ms 12124 KB Output is correct
8 Correct 12 ms 12152 KB Output is correct
9 Correct 12 ms 12152 KB Output is correct
10 Correct 13 ms 12152 KB Output is correct
11 Correct 12 ms 12152 KB Output is correct
12 Correct 12 ms 12152 KB Output is correct
13 Correct 12 ms 12156 KB Output is correct
14 Correct 14 ms 12132 KB Output is correct
15 Correct 13 ms 12024 KB Output is correct
16 Correct 14 ms 12024 KB Output is correct
17 Correct 12 ms 12152 KB Output is correct
18 Correct 14 ms 12020 KB Output is correct
19 Correct 12 ms 12152 KB Output is correct
20 Correct 16 ms 12024 KB Output is correct
21 Correct 12 ms 12280 KB Output is correct
22 Correct 13 ms 12280 KB Output is correct
23 Correct 13 ms 12252 KB Output is correct
24 Correct 13 ms 12280 KB Output is correct
25 Correct 13 ms 12152 KB Output is correct
26 Correct 13 ms 12156 KB Output is correct
27 Correct 13 ms 12152 KB Output is correct
28 Correct 13 ms 12152 KB Output is correct
29 Correct 13 ms 12152 KB Output is correct
30 Correct 12 ms 12024 KB Output is correct
31 Correct 13 ms 12280 KB Output is correct
32 Correct 12 ms 12152 KB Output is correct
33 Correct 12 ms 12024 KB Output is correct
34 Correct 12 ms 12024 KB Output is correct
35 Correct 12 ms 12156 KB Output is correct
36 Correct 12 ms 12152 KB Output is correct
37 Correct 12 ms 12152 KB Output is correct
38 Correct 13 ms 12152 KB Output is correct
39 Correct 12 ms 12152 KB Output is correct
40 Correct 13 ms 12152 KB Output is correct
41 Correct 12 ms 12024 KB Output is correct
42 Correct 13 ms 12152 KB Output is correct
43 Correct 13 ms 12152 KB Output is correct
44 Correct 12 ms 12024 KB Output is correct
45 Correct 13 ms 12152 KB Output is correct
46 Correct 13 ms 12152 KB Output is correct
47 Correct 12 ms 12152 KB Output is correct
48 Correct 12 ms 12152 KB Output is correct
49 Correct 12 ms 12152 KB Output is correct
50 Correct 12 ms 12024 KB Output is correct
51 Correct 13 ms 12072 KB Output is correct
52 Correct 12 ms 12028 KB Output is correct
53 Correct 12 ms 12152 KB Output is correct
54 Correct 12 ms 12024 KB Output is correct
55 Correct 12 ms 12152 KB Output is correct
56 Correct 12 ms 12152 KB Output is correct
57 Correct 12 ms 12152 KB Output is correct
58 Correct 13 ms 12152 KB Output is correct
59 Correct 466 ms 40724 KB Output is correct
60 Correct 503 ms 43572 KB Output is correct
61 Correct 12 ms 12028 KB Output is correct
62 Correct 13 ms 12152 KB Output is correct
63 Correct 424 ms 36996 KB Output is correct
64 Correct 15 ms 12536 KB Output is correct
65 Correct 26 ms 14072 KB Output is correct
66 Correct 169 ms 27928 KB Output is correct
67 Correct 559 ms 46968 KB Output is correct
68 Correct 578 ms 48664 KB Output is correct
69 Correct 20 ms 13176 KB Output is correct
70 Correct 120 ms 23404 KB Output is correct
71 Correct 362 ms 45912 KB Output is correct
72 Correct 386 ms 44268 KB Output is correct
73 Correct 118 ms 20080 KB Output is correct
74 Correct 509 ms 41320 KB Output is correct
75 Correct 41 ms 15728 KB Output is correct
76 Correct 376 ms 45620 KB Output is correct
77 Correct 415 ms 45684 KB Output is correct
78 Correct 49 ms 15732 KB Output is correct
79 Correct 559 ms 45176 KB Output is correct
80 Correct 17 ms 12408 KB Output is correct
81 Correct 156 ms 22636 KB Output is correct
82 Correct 441 ms 43416 KB Output is correct
83 Correct 541 ms 41336 KB Output is correct
84 Correct 512 ms 41192 KB Output is correct
85 Correct 504 ms 41348 KB Output is correct
86 Correct 510 ms 43448 KB Output is correct
87 Correct 511 ms 43452 KB Output is correct