oj.uz

답안 #234681

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
234681 2020-05-25T07:42:16 Z AlexLuchianov Construction of Highway (JOI18_construction) C++14
7 / 100
 2000 ms 141300 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <cassert>
#include <map>
#include <stack>

using namespace std;

using ll = long long;
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) < (b)) ? (b) : (a))

int const nmax = 200000;
int v[1 + nmax];
int ord[1 + nmax];

map<int,int> mp;

void normalize(int n){
  vector<int> temp;
  for(int i = 1;i <= n; i++)
    temp.push_back(v[i]);
  sort(temp.begin(), temp.end());
  temp.erase(unique(temp.begin(), temp.end()), temp.end());
  for(int i = 0; i < temp.size(); i++)
    mp[temp[i]] = 1 + i;
  for(int i = 1;i <= n; i++)
    v[i] = mp[v[i]];
}

namespace FenwickTree{
  vector<int> aib;
  int n;
  void initialize(int n_){
    n = n_;
    aib.resize(1 + n);
  }
  vector<int> touched;

  void clean(){
    for(int h = 0; h < touched.size(); h++)
      aib[touched[h]] = 0;
  }

  void update(int pos, int val){
    for(int x = pos; x <= n; x += (x ^ (x & (x - 1)))) {
      aib[x] += val;
      touched.push_back(x);
    }
  }
  int query(int pos){
    int result = 0;
    for(int x = pos; 0 < x; x = (x & (x - 1)))
      result += aib[x];
    return result;
  }
}

namespace HLD{
  vector<int> g[1 + nmax];
  int far[1 + nmax], sz[1 + nmax];
  void dfs(int node){
    sz[node] = 1;
    for(int h = 0; h < g[node].size(); h++){
      int to = g[node][h];
      far[to] = node;
      dfs(to);
      sz[node] += sz[to];
    }
  }
  int ptr = 0;

  vector<int> path, path_position;
  vector<int> chain_father, chain_size;
  stack<pair<int,int>> st[1 + nmax];

  void _partition(int node, int curr){
    path[node] = curr;
    path_position[node] = ++chain_size[curr];
    if(path_position[node] == 1)
      chain_father[curr] = node;

    int best = 0;
    for(int h = 0; h < g[node].size(); h++){
      int to = g[node][h];
      if(sz[best] < sz[to])
        best = to;
    }
    if(0 < best)
      _partition(best, curr);
    for(int h = 0; h < g[node].size(); h++){
      int to = g[node][h];
      if(to != best)
        _partition(to, ++ptr);
    }
  }

  void intialize(int n){
    path.resize(1 + n);
    path_position.resize(1 + n);
    chain_father.resize(1 + n);
    chain_size.resize(1 + n);

    ptr = 0;
    dfs(1);
    _partition(1, ++ptr);

    for(int i = 1;i <= ptr; i++)
      st[i].push({chain_size[i], 1});
  }

  vector<pair<int,int>> _affect(int chain, int pos, int val){
    vector<pair<int,int>> work;

    int last = 0;
    while(0 < st[chain].size() && st[chain].top().first <= pos){
      work.push_back({st[chain].top().first - last, st[chain].top().second});
      last = st[chain].top().first;
      st[chain].pop();
    }
    if(last < pos)
      work.push_back({pos - last, st[chain].top().second});
    st[chain].push({pos, val});
    return work;
  }

  ll query(int node, int val){
    vector<pair<int,int>> work;
    while(0 < node){
      int curr = path[node];
      int pos = path_position[node];
      vector<pair<int,int>> work2 = _affect(curr, pos, val);
      node = far[chain_father[curr]];
      reverse(work2.begin(), work2.end());
      work.insert(work.end(), work2.begin(), work2.end());
    }
    reverse(work.begin(), work.end());

    ll result = 0;
    FenwickTree::clean();

    for(int i = work.size() - 1; 0 <= i; i--){
      result += 1LL * FenwickTree::query(work[i].second - 1) * work[i].first;
      FenwickTree::update(work[i].second, work[i].first);
    }
    return result;
  }
}

int main()
{
  int n;
  cin >> n;
  for(int i = 1;i <= n; i++)
    cin >> v[i];
  normalize(n);
  ord[1] = 1;
  for(int i = 2; i <= n; i++) {
    int farp;
    cin >> farp >> ord[i];
    HLD::g[farp].push_back(ord[i]);
  }

  HLD::intialize(n);
  FenwickTree::initialize(n);

  for(int i = n;1 <= i; i--)
    HLD::query(ord[i], v[ord[i]]);

  for(int i = 2; i <= n; i++){
    int node = ord[i];
    cout << HLD::query(HLD::far[node], v[node]) << '\n';
  }

  return 0;
}

Compilation message

construction.cpp: In function 'void normalize(int)':
construction.cpp:27:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < temp.size(); i++)
                  ~~^~~~~~~~~~~~~
construction.cpp: In function 'void FenwickTree::clean()':
construction.cpp:43:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int h = 0; h < touched.size(); h++)
                    ~~^~~~~~~~~~~~~~~~
construction.cpp: In function 'void HLD::dfs(int)':
construction.cpp:66:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int h = 0; h < g[node].size(); h++){
                    ~~^~~~~~~~~~~~~~~~
construction.cpp: In function 'void HLD::_partition(int, int)':
construction.cpp:86:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int h = 0; h < g[node].size(); h++){
                    ~~^~~~~~~~~~~~~~~~
construction.cpp:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int h = 0; h < g[node].size(); h++){
                    ~~^~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 97 ms 139640 KB Output is correct
2 Correct 106 ms 139640 KB Output is correct
3 Correct 105 ms 139772 KB Output is correct
4 Correct 118 ms 139896 KB Output is correct
5 Correct 139 ms 139896 KB Output is correct
6 Correct 136 ms 139896 KB Output is correct
7 Correct 136 ms 139896 KB Output is correct
8 Correct 116 ms 139768 KB Output is correct
9 Correct 114 ms 139896 KB Output is correct
10 Correct 117 ms 139640 KB Output is correct
11 Correct 126 ms 139896 KB Output is correct
12 Correct 121 ms 139896 KB Output is correct
13 Correct 123 ms 139896 KB Output is correct
14 Correct 123 ms 139896 KB Output is correct
15 Correct 148 ms 140220 KB Output is correct
16 Correct 158 ms 140152 KB Output is correct
17 Correct 159 ms 140152 KB Output is correct
18 Correct 157 ms 140156 KB Output is correct
19 Correct 128 ms 139768 KB Output is correct
20 Correct 123 ms 139896 KB Output is correct
21 Correct 122 ms 139896 KB Output is correct
22 Correct 152 ms 140328 KB Output is correct
23 Correct 155 ms 140024 KB Output is correct
24 Correct 148 ms 139896 KB Output is correct
25 Correct 142 ms 139896 KB Output is correct
26 Correct 121 ms 139896 KB Output is correct
27 Correct 124 ms 139768 KB Output is correct
28 Correct 130 ms 139896 KB Output is correct
29 Correct 127 ms 139768 KB Output is correct
30 Correct 157 ms 140156 KB Output is correct
31 Correct 183 ms 140028 KB Output is correct
32 Correct 132 ms 139768 KB Output is correct
33 Correct 127 ms 139768 KB Output is correct
34 Correct 122 ms 139896 KB Output is correct
35 Correct 126 ms 139768 KB Output is correct
36 Correct 133 ms 139896 KB Output is correct
37 Correct 134 ms 139896 KB Output is correct
38 Correct 134 ms 139896 KB Output is correct
39 Correct 129 ms 139896 KB Output is correct
40 Correct 129 ms 139896 KB Output is correct
41 Correct 128 ms 139884 KB Output is correct
42 Correct 139 ms 139988 KB Output is correct
43 Correct 123 ms 140000 KB Output is correct
44 Correct 138 ms 139896 KB Output is correct

Subtask #2
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 97 ms 139640 KB Output is correct
2 Correct 106 ms 139640 KB Output is correct
3 Correct 105 ms 139772 KB Output is correct
4 Correct 118 ms 139896 KB Output is correct
5 Correct 139 ms 139896 KB Output is correct
6 Correct 136 ms 139896 KB Output is correct
7 Correct 136 ms 139896 KB Output is correct
8 Correct 116 ms 139768 KB Output is correct
9 Correct 114 ms 139896 KB Output is correct
10 Correct 117 ms 139640 KB Output is correct
11 Correct 126 ms 139896 KB Output is correct
12 Correct 121 ms 139896 KB Output is correct
13 Correct 123 ms 139896 KB Output is correct
14 Correct 123 ms 139896 KB Output is correct
15 Correct 148 ms 140220 KB Output is correct
16 Correct 158 ms 140152 KB Output is correct
17 Correct 159 ms 140152 KB Output is correct
18 Correct 157 ms 140156 KB Output is correct
19 Correct 128 ms 139768 KB Output is correct
20 Correct 123 ms 139896 KB Output is correct
21 Correct 122 ms 139896 KB Output is correct
22 Correct 152 ms 140328 KB Output is correct
23 Correct 155 ms 140024 KB Output is correct
24 Correct 148 ms 139896 KB Output is correct
25 Correct 142 ms 139896 KB Output is correct
26 Correct 121 ms 139896 KB Output is correct
27 Correct 124 ms 139768 KB Output is correct
28 Correct 130 ms 139896 KB Output is correct
29 Correct 127 ms 139768 KB Output is correct
30 Correct 157 ms 140156 KB Output is correct
31 Correct 183 ms 140028 KB Output is correct
32 Correct 132 ms 139768 KB Output is correct
33 Correct 127 ms 139768 KB Output is correct
34 Correct 122 ms 139896 KB Output is correct
35 Correct 126 ms 139768 KB Output is correct
36 Correct 133 ms 139896 KB Output is correct
37 Correct 134 ms 139896 KB Output is correct
38 Correct 134 ms 139896 KB Output is correct
39 Correct 129 ms 139896 KB Output is correct
40 Correct 129 ms 139896 KB Output is correct
41 Correct 128 ms 139884 KB Output is correct
42 Correct 139 ms 139988 KB Output is correct
43 Correct 123 ms 140000 KB Output is correct
44 Correct 138 ms 139896 KB Output is correct
45 Correct 251 ms 140152 KB Output is correct
46 Execution timed out 2096 ms 141300 KB Time limit exceeded
47 Halted 0 ms 0 KB -

Subtask #3
0 / 84.0

# 결과 실행 시간 메모리 Grader output
1 Correct 97 ms 139640 KB Output is correct
2 Correct 106 ms 139640 KB Output is correct
3 Correct 105 ms 139772 KB Output is correct
4 Correct 118 ms 139896 KB Output is correct
5 Correct 139 ms 139896 KB Output is correct
6 Correct 136 ms 139896 KB Output is correct
7 Correct 136 ms 139896 KB Output is correct
8 Correct 116 ms 139768 KB Output is correct
9 Correct 114 ms 139896 KB Output is correct
10 Correct 117 ms 139640 KB Output is correct
11 Correct 126 ms 139896 KB Output is correct
12 Correct 121 ms 139896 KB Output is correct
13 Correct 123 ms 139896 KB Output is correct
14 Correct 123 ms 139896 KB Output is correct
15 Correct 148 ms 140220 KB Output is correct
16 Correct 158 ms 140152 KB Output is correct
17 Correct 159 ms 140152 KB Output is correct
18 Correct 157 ms 140156 KB Output is correct
19 Correct 128 ms 139768 KB Output is correct
20 Correct 123 ms 139896 KB Output is correct
21 Correct 122 ms 139896 KB Output is correct
22 Correct 152 ms 140328 KB Output is correct
23 Correct 155 ms 140024 KB Output is correct
24 Correct 148 ms 139896 KB Output is correct
25 Correct 142 ms 139896 KB Output is correct
26 Correct 121 ms 139896 KB Output is correct
27 Correct 124 ms 139768 KB Output is correct
28 Correct 130 ms 139896 KB Output is correct
29 Correct 127 ms 139768 KB Output is correct
30 Correct 157 ms 140156 KB Output is correct
31 Correct 183 ms 140028 KB Output is correct
32 Correct 132 ms 139768 KB Output is correct
33 Correct 127 ms 139768 KB Output is correct
34 Correct 122 ms 139896 KB Output is correct
35 Correct 126 ms 139768 KB Output is correct
36 Correct 133 ms 139896 KB Output is correct
37 Correct 134 ms 139896 KB Output is correct
38 Correct 134 ms 139896 KB Output is correct
39 Correct 129 ms 139896 KB Output is correct
40 Correct 129 ms 139896 KB Output is correct
41 Correct 128 ms 139884 KB Output is correct
42 Correct 139 ms 139988 KB Output is correct
43 Correct 123 ms 140000 KB Output is correct
44 Correct 138 ms 139896 KB Output is correct
45 Correct 251 ms 140152 KB Output is correct
46 Execution timed out 2096 ms 141300 KB Time limit exceeded
47 Halted 0 ms 0 KB -