oj.uz

답안 #596484

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
596484 2022-07-14T19:17:24 Z keta_tsimakuridze Meetings 2 (JOI21_meetings2) C++14
100 / 100
 1072 ms 59800 KB 
#include<bits/stdc++.h>
#define f first
#define s second
#define pii pair<int,int>
#define Pii pair<pair<int,int> , pair<int,int> >
using namespace std;
const int N = 2e5 + 5, mod = 1e9 + 7; // !
int t, sz[N], f[N], h;
int n, c;
int ans[N];
map<int,int> SZ[N];
vector<pair<int, pair<int,int> > > x;
vector<int> V[N];
int find(int u,int p, int Sz) {
    for(int i = 0; i< V[u].size(); i++) {
        if(V[u][i] == p|| f[V[u][i]]) continue;
        if(sz[V[u][i]] > Sz / 2) return find(V[u][i], u, Sz);
    }
    return u;
}
void dfs(int u, int p) {
    sz[u] = 1;
    for(int i = 0; i < V[u].size(); i++) {
        if(V[u][i] == p || f[V[u][i]]) continue;
        dfs(V[u][i], u);
        sz[u] += sz[V[u][i]];
    }
}
void dfs(int u,int p,int P) {
    ++h;
    x.push_back({SZ[p][u], {h, P}});
    ans[min(SZ[p][u], n - SZ[c][P]) * 2] = max(ans[min(SZ[p][u], n - SZ[c][P]) * 2], h + 1);
    for(int i = 0; i < V[u].size(); i++) {
        if(V[u][i] == p || f[V[u][i]]) continue;
        dfs(V[u][i], u, P);
    }
    --h;
}
void upd(Pii &mx, pii x) {
    if(x.s == mx.f.s) mx.f = max(mx.f, x);
    else  mx.s = max(mx.s, x);
    if(mx.f.f < mx.s.f) swap(mx.s, mx.f);
}
void decomp(int U) {
    dfs(U, 0);
    c = find(U, 0, sz[U]);
    for(int i = 0; i < V[c].size(); i++) {
        if(f[V[c][i]] == 0) dfs(V[c][i], c, V[c][i]);
    }

    pair<pii, pii> mx;
    mx = {{-n, 0}, {-n, 0}};
    sort(x.begin(), x.end());
    while(x.size()) {
            int i = x.back().f;
            pii y = x.back().s;
            ans[i * 2] = max(ans[i * 2], y.f + (mx.f.s != y.s ? mx.f.f : mx.s.f ) + 1);
            upd(mx, y);
            x.pop_back();
    }
    f[c] = 1;
    int C = c;
    for(int i = 0; i < V[C].size(); i++) {
        if(!f[V[C][i]])  decomp(V[C][i]);
    }
}
void dfss(int u,int p) {
    sz[u] = 1;
    for(int i = 0; i < V[u].size(); i++) {
        if(V[u][i] == p) continue;
        dfss(V[u][i], u);
        SZ[u][V[u][i]] = sz[V[u][i]];
        sz[u] += sz[V[u][i]];
    }
    SZ[u][p] = n - sz[u];
}
main(){
    cin >> n;
    for(int i = 1; i < n; i++) {
        int u, v;
        cin >> u >> v;
        V[u].push_back(v);
        V[v].push_back(u);
    }
    dfss(1, 0);
    decomp(1);
    for(int i = n; i >= 1; i--) {
        ans[i] = (i % 2 == 0 ? max(ans[i], ans[i + 2]) : 1);
    }
    for(int i = 1; i <= n; i++) {
        ans[i] = max(ans[i], 1);
        cout << ans[i] << "\n";
    }
 }

Compilation message

meetings2.cpp: In function 'int find(int, int, int)':
meetings2.cpp:15:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     for(int i = 0; i< V[u].size(); i++) {
      |                    ~^~~~~~~~~~~~~
meetings2.cpp: In function 'void dfs(int, int)':
meetings2.cpp:23:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |     for(int i = 0; i < V[u].size(); i++) {
      |                    ~~^~~~~~~~~~~~~
meetings2.cpp: In function 'void dfs(int, int, int)':
meetings2.cpp:33:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |     for(int i = 0; i < V[u].size(); i++) {
      |                    ~~^~~~~~~~~~~~~
meetings2.cpp: In function 'void decomp(int)':
meetings2.cpp:47:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     for(int i = 0; i < V[c].size(); i++) {
      |                    ~~^~~~~~~~~~~~~
meetings2.cpp:63:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(int i = 0; i < V[C].size(); i++) {
      |                    ~~^~~~~~~~~~~~~
meetings2.cpp: In function 'void dfss(int, int)':
meetings2.cpp:69:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   69 |     for(int i = 0; i < V[u].size(); i++) {
      |                    ~~^~~~~~~~~~~~~
meetings2.cpp: At global scope:
meetings2.cpp:77:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   77 | main(){
      | ^~~~

Subtask #1
4.0 / 4.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 7 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 8 ms 14412 KB Output is correct
5 Correct 7 ms 14292 KB Output is correct
6 Correct 7 ms 14292 KB Output is correct
7 Correct 7 ms 14292 KB Output is correct
8 Correct 9 ms 14292 KB Output is correct
9 Correct 9 ms 14292 KB Output is correct
10 Correct 9 ms 14292 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14292 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 8 ms 14292 KB Output is correct
15 Correct 7 ms 14292 KB Output is correct
16 Correct 9 ms 14376 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14412 KB Output is correct
19 Correct 7 ms 14484 KB Output is correct
20 Correct 7 ms 14292 KB Output is correct
21 Correct 10 ms 14296 KB Output is correct

Subtask #2
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 7 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 8 ms 14412 KB Output is correct
5 Correct 7 ms 14292 KB Output is correct
6 Correct 7 ms 14292 KB Output is correct
7 Correct 7 ms 14292 KB Output is correct
8 Correct 9 ms 14292 KB Output is correct
9 Correct 9 ms 14292 KB Output is correct
10 Correct 9 ms 14292 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14292 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 8 ms 14292 KB Output is correct
15 Correct 7 ms 14292 KB Output is correct
16 Correct 9 ms 14376 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14412 KB Output is correct
19 Correct 7 ms 14484 KB Output is correct
20 Correct 7 ms 14292 KB Output is correct
21 Correct 10 ms 14296 KB Output is correct
22 Correct 17 ms 15012 KB Output is correct
23 Correct 14 ms 15064 KB Output is correct
24 Correct 15 ms 15060 KB Output is correct
25 Correct 15 ms 15032 KB Output is correct
26 Correct 14 ms 15044 KB Output is correct
27 Correct 14 ms 15064 KB Output is correct
28 Correct 14 ms 15060 KB Output is correct
29 Correct 14 ms 15044 KB Output is correct
30 Correct 14 ms 15060 KB Output is correct
31 Correct 16 ms 15000 KB Output is correct
32 Correct 16 ms 15156 KB Output is correct
33 Correct 14 ms 15336 KB Output is correct
34 Correct 12 ms 15048 KB Output is correct
35 Correct 17 ms 15036 KB Output is correct
36 Correct 15 ms 15060 KB Output is correct
37 Correct 13 ms 15004 KB Output is correct
38 Correct 14 ms 15188 KB Output is correct

Subtask #3
80.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 14292 KB Output is correct
2 Correct 7 ms 14292 KB Output is correct
3 Correct 7 ms 14292 KB Output is correct
4 Correct 8 ms 14412 KB Output is correct
5 Correct 7 ms 14292 KB Output is correct
6 Correct 7 ms 14292 KB Output is correct
7 Correct 7 ms 14292 KB Output is correct
8 Correct 9 ms 14292 KB Output is correct
9 Correct 9 ms 14292 KB Output is correct
10 Correct 9 ms 14292 KB Output is correct
11 Correct 7 ms 14420 KB Output is correct
12 Correct 7 ms 14292 KB Output is correct
13 Correct 7 ms 14292 KB Output is correct
14 Correct 8 ms 14292 KB Output is correct
15 Correct 7 ms 14292 KB Output is correct
16 Correct 9 ms 14376 KB Output is correct
17 Correct 7 ms 14292 KB Output is correct
18 Correct 7 ms 14412 KB Output is correct
19 Correct 7 ms 14484 KB Output is correct
20 Correct 7 ms 14292 KB Output is correct
21 Correct 10 ms 14296 KB Output is correct
22 Correct 17 ms 15012 KB Output is correct
23 Correct 14 ms 15064 KB Output is correct
24 Correct 15 ms 15060 KB Output is correct
25 Correct 15 ms 15032 KB Output is correct
26 Correct 14 ms 15044 KB Output is correct
27 Correct 14 ms 15064 KB Output is correct
28 Correct 14 ms 15060 KB Output is correct
29 Correct 14 ms 15044 KB Output is correct
30 Correct 14 ms 15060 KB Output is correct
31 Correct 16 ms 15000 KB Output is correct
32 Correct 16 ms 15156 KB Output is correct
33 Correct 14 ms 15336 KB Output is correct
34 Correct 12 ms 15048 KB Output is correct
35 Correct 17 ms 15036 KB Output is correct
36 Correct 15 ms 15060 KB Output is correct
37 Correct 13 ms 15004 KB Output is correct
38 Correct 14 ms 15188 KB Output is correct
39 Correct 730 ms 44468 KB Output is correct
40 Correct 730 ms 46040 KB Output is correct
41 Correct 732 ms 46772 KB Output is correct
42 Correct 723 ms 47392 KB Output is correct
43 Correct 766 ms 47368 KB Output is correct
44 Correct 730 ms 47488 KB Output is correct
45 Correct 1072 ms 54204 KB Output is correct
46 Correct 835 ms 59800 KB Output is correct
47 Correct 537 ms 47992 KB Output is correct
48 Correct 556 ms 48504 KB Output is correct
49 Correct 899 ms 48028 KB Output is correct
50 Correct 829 ms 48280 KB Output is correct
51 Correct 815 ms 58516 KB Output is correct