oj.uz

Submission #783729

# Submission time Handle Problem Language Result Execution time Memory
783729 2023-07-15T09:04:55 Z raysh07 Network (BOI15_net) C++17
100 / 100
 371 ms 52068 KB 
#include <bits/stdc++.h>
#include <iomanip>
 
#define ll long long
#define pb push_back
#define F first
#define S second
#define nl '\n'
#define all(x) x.begin(), x.end()
 
const int N = 5e5 + 7;
const int modd = 1e9 + 7;
const int INF = 1e9 + 7;
const double pi = 3.141592653589793238462643383279502884197;
const double EPS = 0.0000000000001;
using namespace std;
  
int gcd(int a, int b){
    if (b == 0)
        return a;
    else
        return gcd(b, a % b);
}
 
ll binpow(ll a, ll x){
    if(x == 0) return 1;
    if(x % 2 == 0){
        ll y = binpow(a, x / 2);
        return (y * y);
    }
    else{
        return (binpow(a, x - 1) * a);
    }
}
 
ll n;
vector <ll> v[N];
vector <ll> s;
vector <ll> l;
vector <ll> r;
bool used[N];
 
void dfs(ll x){
    used[x] = 1;
    if(v[x].size() == 1){
        s.pb(x);
    }
    for(auto to : v[x]){
        if(used[to] == 0){
            dfs(to);
        }
    }
}
 
void Muqaltin(){  
    cin >> n;
    for(int i = 1; i < n; i++){
        int x, y;
        cin >> x >> y;
        v[x].pb(y);
        v[y].pb(x);
    }
    dfs(1);
    for(int i = 0; i < s.size() / 2; i++){
        l.pb(s[i]);
    }
    for(int i = s.size() / 2; i < s.size(); i++){
        r.pb(s[i]);
    }
    cout << max(l.size(), r.size()) << nl;
    for(int i = 0; i < min(l.size(), r.size()); i++){
        cout << l[i] << ' ' << r[i] << nl;
    }
    if(l.size() > r.size()){
        cout << l[l.size() - 1] << " " << l[0] << nl;
    }   
    else if(l.size() < r.size()){
        cout << r[r.size() - 1] << " " << r[0] << nl;
    }
    return;
}
 
int main(){
    // freopen("pails.in", "r", stdin);
    //  freopen("pails.out", "w", stdout);
    ios_base :: sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
 
    int t = 1;
    // cin >> t;
    while(t--){
        Muqaltin();
    }
    return 0;
}

Compilation message

net.cpp: In function 'void Muqaltin()':
net.cpp:65:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |     for(int i = 0; i < s.size() / 2; i++){
      |                    ~~^~~~~~~~~~~~~~
net.cpp:68:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int i = s.size() / 2; i < s.size(); i++){
      |                               ~~^~~~~~~~~~
net.cpp:72:22: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
   72 |     for(int i = 0; i < min(l.size(), r.size()); i++){
      |                    ~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct
4 Correct 5 ms 12048 KB Output is correct
5 Correct 6 ms 12072 KB Output is correct
6 Correct 6 ms 12068 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 8 ms 12104 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11956 KB Output is correct
11 Correct 6 ms 11968 KB Output is correct
12 Correct 5 ms 11948 KB Output is correct
13 Correct 6 ms 11988 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 5 ms 11988 KB Output is correct
16 Correct 6 ms 12068 KB Output is correct
17 Correct 6 ms 12072 KB Output is correct
18 Correct 7 ms 12020 KB Output is correct
19 Correct 6 ms 11988 KB Output is correct
20 Correct 6 ms 12064 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct
4 Correct 5 ms 12048 KB Output is correct
5 Correct 6 ms 12072 KB Output is correct
6 Correct 6 ms 12068 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 8 ms 12104 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11956 KB Output is correct
11 Correct 6 ms 11968 KB Output is correct
12 Correct 5 ms 11948 KB Output is correct
13 Correct 6 ms 11988 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 5 ms 11988 KB Output is correct
16 Correct 6 ms 12068 KB Output is correct
17 Correct 6 ms 12072 KB Output is correct
18 Correct 7 ms 12020 KB Output is correct
19 Correct 6 ms 11988 KB Output is correct
20 Correct 6 ms 12064 KB Output is correct
21 Correct 5 ms 11988 KB Output is correct
22 Correct 7 ms 12116 KB Output is correct
23 Correct 6 ms 12180 KB Output is correct
24 Correct 6 ms 12116 KB Output is correct
25 Correct 7 ms 12264 KB Output is correct
26 Correct 6 ms 12104 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 6 ms 12068 KB Output is correct
31 Correct 8 ms 12220 KB Output is correct
32 Correct 5 ms 11988 KB Output is correct
33 Correct 6 ms 12052 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 12076 KB Output is correct
39 Correct 7 ms 11988 KB Output is correct
40 Correct 7 ms 11988 KB Output is correct
41 Correct 6 ms 11988 KB Output is correct
42 Correct 6 ms 11996 KB Output is correct
43 Correct 7 ms 12076 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 12068 KB Output is correct
47 Correct 6 ms 12000 KB Output is correct
48 Correct 6 ms 11988 KB Output is correct
49 Correct 6 ms 12080 KB Output is correct
50 Correct 6 ms 11988 KB Output is correct
51 Correct 5 ms 12076 KB Output is correct
52 Correct 7 ms 11988 KB Output is correct
53 Correct 6 ms 12116 KB Output is correct
54 Correct 6 ms 11988 KB Output is correct
55 Correct 6 ms 11988 KB Output is correct
56 Correct 7 ms 11988 KB Output is correct
57 Correct 6 ms 11988 KB Output is correct
58 Correct 6 ms 12204 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 5 ms 11988 KB Output is correct
4 Correct 5 ms 12048 KB Output is correct
5 Correct 6 ms 12072 KB Output is correct
6 Correct 6 ms 12068 KB Output is correct
7 Correct 6 ms 11988 KB Output is correct
8 Correct 8 ms 12104 KB Output is correct
9 Correct 6 ms 11988 KB Output is correct
10 Correct 6 ms 11956 KB Output is correct
11 Correct 6 ms 11968 KB Output is correct
12 Correct 5 ms 11948 KB Output is correct
13 Correct 6 ms 11988 KB Output is correct
14 Correct 6 ms 11988 KB Output is correct
15 Correct 5 ms 11988 KB Output is correct
16 Correct 6 ms 12068 KB Output is correct
17 Correct 6 ms 12072 KB Output is correct
18 Correct 7 ms 12020 KB Output is correct
19 Correct 6 ms 11988 KB Output is correct
20 Correct 6 ms 12064 KB Output is correct
21 Correct 5 ms 11988 KB Output is correct
22 Correct 7 ms 12116 KB Output is correct
23 Correct 6 ms 12180 KB Output is correct
24 Correct 6 ms 12116 KB Output is correct
25 Correct 7 ms 12264 KB Output is correct
26 Correct 6 ms 12104 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 6 ms 12068 KB Output is correct
31 Correct 8 ms 12220 KB Output is correct
32 Correct 5 ms 11988 KB Output is correct
33 Correct 6 ms 12052 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 12076 KB Output is correct
39 Correct 7 ms 11988 KB Output is correct
40 Correct 7 ms 11988 KB Output is correct
41 Correct 6 ms 11988 KB Output is correct
42 Correct 6 ms 11996 KB Output is correct
43 Correct 7 ms 12076 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 12068 KB Output is correct
47 Correct 6 ms 12000 KB Output is correct
48 Correct 6 ms 11988 KB Output is correct
49 Correct 6 ms 12080 KB Output is correct
50 Correct 6 ms 11988 KB Output is correct
51 Correct 5 ms 12076 KB Output is correct
52 Correct 7 ms 11988 KB Output is correct
53 Correct 6 ms 12116 KB Output is correct
54 Correct 6 ms 11988 KB Output is correct
55 Correct 6 ms 11988 KB Output is correct
56 Correct 7 ms 11988 KB Output is correct
57 Correct 6 ms 11988 KB Output is correct
58 Correct 6 ms 12204 KB Output is correct
59 Correct 235 ms 45268 KB Output is correct
60 Correct 302 ms 48388 KB Output is correct
61 Correct 6 ms 11988 KB Output is correct
62 Correct 6 ms 11988 KB Output is correct
63 Correct 200 ms 41340 KB Output is correct
64 Correct 9 ms 12460 KB Output is correct
65 Correct 13 ms 13908 KB Output is correct
66 Correct 98 ms 28084 KB Output is correct
67 Correct 325 ms 47344 KB Output is correct
68 Correct 371 ms 49444 KB Output is correct
69 Correct 10 ms 13104 KB Output is correct
70 Correct 55 ms 24528 KB Output is correct
71 Correct 189 ms 52068 KB Output is correct
72 Correct 202 ms 50220 KB Output is correct
73 Correct 52 ms 21056 KB Output is correct
74 Correct 306 ms 44452 KB Output is correct
75 Correct 23 ms 16204 KB Output is correct
76 Correct 239 ms 51516 KB Output is correct
77 Correct 226 ms 51936 KB Output is correct
78 Correct 21 ms 15700 KB Output is correct
79 Correct 341 ms 45644 KB Output is correct
80 Correct 7 ms 12244 KB Output is correct
81 Correct 63 ms 24064 KB Output is correct
82 Correct 282 ms 48560 KB Output is correct
83 Correct 289 ms 44464 KB Output is correct
84 Correct 288 ms 44632 KB Output is correct
85 Correct 305 ms 44436 KB Output is correct
86 Correct 313 ms 48560 KB Output is correct
87 Correct 328 ms 48356 KB Output is correct