oj.uz

Submission #765356

# Submission time Handle Problem Language Result Execution time Memory
765356 2023-06-24T11:28:25 Z vjudge1 Network (BOI15_net) C++11
100 / 100
 336 ms 52136 KB 
    /*
Muqalzhar taui
*/
#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:67:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for(int i = 0; i < s.size() / 2; i++){
      |                    ~~^~~~~~~~~~~~~~
net.cpp:70:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for(int i = s.size() / 2; i < s.size(); i++){
      |                               ~~^~~~~~~~~~
net.cpp:74:22: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
   74 |     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 5 ms 11988 KB Output is correct
2 Correct 5 ms 11988 KB Output is correct
3 Correct 5 ms 11996 KB Output is correct
4 Correct 5 ms 11988 KB Output is correct
5 Correct 5 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 5 ms 11988 KB Output is correct
8 Correct 5 ms 11988 KB Output is correct
9 Correct 5 ms 11988 KB Output is correct
10 Correct 5 ms 11988 KB Output is correct
11 Correct 5 ms 11988 KB Output is correct
12 Correct 5 ms 11988 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 5 ms 11988 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 5 ms 11988 KB Output is correct
17 Correct 5 ms 11988 KB Output is correct
18 Correct 5 ms 11988 KB Output is correct
19 Correct 5 ms 11988 KB Output is correct
20 Correct 5 ms 11988 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 11988 KB Output is correct
2 Correct 5 ms 11988 KB Output is correct
3 Correct 5 ms 11996 KB Output is correct
4 Correct 5 ms 11988 KB Output is correct
5 Correct 5 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 5 ms 11988 KB Output is correct
8 Correct 5 ms 11988 KB Output is correct
9 Correct 5 ms 11988 KB Output is correct
10 Correct 5 ms 11988 KB Output is correct
11 Correct 5 ms 11988 KB Output is correct
12 Correct 5 ms 11988 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 5 ms 11988 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 5 ms 11988 KB Output is correct
17 Correct 5 ms 11988 KB Output is correct
18 Correct 5 ms 11988 KB Output is correct
19 Correct 5 ms 11988 KB Output is correct
20 Correct 5 ms 11988 KB Output is correct
21 Correct 5 ms 11988 KB Output is correct
22 Correct 6 ms 12116 KB Output is correct
23 Correct 6 ms 12116 KB Output is correct
24 Correct 5 ms 12116 KB Output is correct
25 Correct 6 ms 12116 KB Output is correct
26 Correct 6 ms 12092 KB Output is correct
27 Correct 5 ms 12164 KB Output is correct
28 Correct 6 ms 12184 KB Output is correct
29 Correct 6 ms 12116 KB Output is correct
30 Correct 5 ms 11988 KB Output is correct
31 Correct 8 ms 12116 KB Output is correct
32 Correct 6 ms 11988 KB Output is correct
33 Correct 5 ms 11988 KB Output is correct
34 Correct 5 ms 11988 KB Output is correct
35 Correct 5 ms 11988 KB Output is correct
36 Correct 5 ms 11988 KB Output is correct
37 Correct 5 ms 11988 KB Output is correct
38 Correct 6 ms 12116 KB Output is correct
39 Correct 5 ms 11988 KB Output is correct
40 Correct 5 ms 11988 KB Output is correct
41 Correct 5 ms 11988 KB Output is correct
42 Correct 5 ms 11988 KB Output is correct
43 Correct 5 ms 12116 KB Output is correct
44 Correct 5 ms 11988 KB Output is correct
45 Correct 5 ms 12032 KB Output is correct
46 Correct 7 ms 12116 KB Output is correct
47 Correct 5 ms 11988 KB Output is correct
48 Correct 5 ms 11988 KB Output is correct
49 Correct 6 ms 12116 KB Output is correct
50 Correct 5 ms 11988 KB Output is correct
51 Correct 5 ms 11988 KB Output is correct
52 Correct 5 ms 11988 KB Output is correct
53 Correct 5 ms 12116 KB Output is correct
54 Correct 5 ms 11956 KB Output is correct
55 Correct 5 ms 11988 KB Output is correct
56 Correct 5 ms 11988 KB Output is correct
57 Correct 5 ms 11988 KB Output is correct
58 Correct 6 ms 12116 KB Output is correct

Subtask #3
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 11988 KB Output is correct
2 Correct 5 ms 11988 KB Output is correct
3 Correct 5 ms 11996 KB Output is correct
4 Correct 5 ms 11988 KB Output is correct
5 Correct 5 ms 11988 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 5 ms 11988 KB Output is correct
8 Correct 5 ms 11988 KB Output is correct
9 Correct 5 ms 11988 KB Output is correct
10 Correct 5 ms 11988 KB Output is correct
11 Correct 5 ms 11988 KB Output is correct
12 Correct 5 ms 11988 KB Output is correct
13 Correct 5 ms 11988 KB Output is correct
14 Correct 5 ms 11988 KB Output is correct
15 Correct 6 ms 11988 KB Output is correct
16 Correct 5 ms 11988 KB Output is correct
17 Correct 5 ms 11988 KB Output is correct
18 Correct 5 ms 11988 KB Output is correct
19 Correct 5 ms 11988 KB Output is correct
20 Correct 5 ms 11988 KB Output is correct
21 Correct 5 ms 11988 KB Output is correct
22 Correct 6 ms 12116 KB Output is correct
23 Correct 6 ms 12116 KB Output is correct
24 Correct 5 ms 12116 KB Output is correct
25 Correct 6 ms 12116 KB Output is correct
26 Correct 6 ms 12092 KB Output is correct
27 Correct 5 ms 12164 KB Output is correct
28 Correct 6 ms 12184 KB Output is correct
29 Correct 6 ms 12116 KB Output is correct
30 Correct 5 ms 11988 KB Output is correct
31 Correct 8 ms 12116 KB Output is correct
32 Correct 6 ms 11988 KB Output is correct
33 Correct 5 ms 11988 KB Output is correct
34 Correct 5 ms 11988 KB Output is correct
35 Correct 5 ms 11988 KB Output is correct
36 Correct 5 ms 11988 KB Output is correct
37 Correct 5 ms 11988 KB Output is correct
38 Correct 6 ms 12116 KB Output is correct
39 Correct 5 ms 11988 KB Output is correct
40 Correct 5 ms 11988 KB Output is correct
41 Correct 5 ms 11988 KB Output is correct
42 Correct 5 ms 11988 KB Output is correct
43 Correct 5 ms 12116 KB Output is correct
44 Correct 5 ms 11988 KB Output is correct
45 Correct 5 ms 12032 KB Output is correct
46 Correct 7 ms 12116 KB Output is correct
47 Correct 5 ms 11988 KB Output is correct
48 Correct 5 ms 11988 KB Output is correct
49 Correct 6 ms 12116 KB Output is correct
50 Correct 5 ms 11988 KB Output is correct
51 Correct 5 ms 11988 KB Output is correct
52 Correct 5 ms 11988 KB Output is correct
53 Correct 5 ms 12116 KB Output is correct
54 Correct 5 ms 11956 KB Output is correct
55 Correct 5 ms 11988 KB Output is correct
56 Correct 5 ms 11988 KB Output is correct
57 Correct 5 ms 11988 KB Output is correct
58 Correct 6 ms 12116 KB Output is correct
59 Correct 229 ms 45244 KB Output is correct
60 Correct 289 ms 48364 KB Output is correct
61 Correct 6 ms 12028 KB Output is correct
62 Correct 5 ms 11984 KB Output is correct
63 Correct 200 ms 41316 KB Output is correct
64 Correct 6 ms 12500 KB Output is correct
65 Correct 12 ms 14000 KB Output is correct
66 Correct 65 ms 28040 KB Output is correct
67 Correct 336 ms 47468 KB Output is correct
68 Correct 332 ms 49560 KB Output is correct
69 Correct 9 ms 13140 KB Output is correct
70 Correct 53 ms 24560 KB Output is correct
71 Correct 181 ms 52136 KB Output is correct
72 Correct 192 ms 50212 KB Output is correct
73 Correct 59 ms 21136 KB Output is correct
74 Correct 274 ms 44508 KB Output is correct
75 Correct 20 ms 16204 KB Output is correct
76 Correct 242 ms 51408 KB Output is correct
77 Correct 184 ms 51836 KB Output is correct
78 Correct 21 ms 15692 KB Output is correct
79 Correct 310 ms 45660 KB Output is correct
80 Correct 6 ms 12244 KB Output is correct
81 Correct 58 ms 24016 KB Output is correct
82 Correct 259 ms 48612 KB Output is correct
83 Correct 271 ms 44532 KB Output is correct
84 Correct 284 ms 44464 KB Output is correct
85 Correct 281 ms 44436 KB Output is correct
86 Correct 287 ms 48480 KB Output is correct
87 Correct 281 ms 48400 KB Output is correct