oj.uz

답안 #234690

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
234690 2020-05-25T07:54:43 Z AlexLuchianov Construction of Highway (JOI18_construction) C++14
7 / 100
 2000 ms 140948 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);
  }
  int seen[1 + nmax];

  vector<int> touched;

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

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

    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());
      steps++;
      if(40 < steps){
        while(1);
        return 0;
      }
    }
    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()
{
  ios::sync_with_stdio(0);
  cin.tie(0);

  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:45:22: 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:73:22: 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:93:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int h = 0; h < g[node].size(); h++){
                    ~~^~~~~~~~~~~~~~~~
construction.cpp:101:22: 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 102 ms 139768 KB Output is correct
2 Correct 103 ms 139640 KB Output is correct
3 Correct 108 ms 139768 KB Output is correct
4 Correct 123 ms 139896 KB Output is correct
5 Correct 155 ms 139896 KB Output is correct
6 Correct 153 ms 139896 KB Output is correct
7 Correct 156 ms 139920 KB Output is correct
8 Correct 122 ms 139768 KB Output is correct
9 Correct 122 ms 139768 KB Output is correct
10 Correct 125 ms 140024 KB Output is correct
11 Correct 141 ms 139896 KB Output is correct
12 Correct 134 ms 139768 KB Output is correct
13 Correct 140 ms 139772 KB Output is correct
14 Correct 135 ms 139896 KB Output is correct
15 Correct 170 ms 140024 KB Output is correct
16 Correct 189 ms 140040 KB Output is correct
17 Correct 193 ms 140152 KB Output is correct
18 Correct 191 ms 140024 KB Output is correct
19 Correct 138 ms 139896 KB Output is correct
20 Correct 136 ms 139896 KB Output is correct
21 Correct 138 ms 139884 KB Output is correct
22 Correct 135 ms 139940 KB Output is correct
23 Correct 143 ms 139896 KB Output is correct
24 Correct 122 ms 140024 KB Output is correct
25 Correct 139 ms 139896 KB Output is correct
26 Correct 126 ms 139768 KB Output is correct
27 Correct 139 ms 139872 KB Output is correct
28 Correct 128 ms 139896 KB Output is correct
29 Correct 134 ms 139816 KB Output is correct
30 Correct 155 ms 140024 KB Output is correct
31 Correct 154 ms 139896 KB Output is correct
32 Correct 138 ms 139848 KB Output is correct
33 Correct 127 ms 139772 KB Output is correct
34 Correct 127 ms 139768 KB Output is correct
35 Correct 136 ms 139896 KB Output is correct
36 Correct 132 ms 139896 KB Output is correct
37 Correct 135 ms 139896 KB Output is correct
38 Correct 135 ms 139768 KB Output is correct
39 Correct 141 ms 139896 KB Output is correct
40 Correct 141 ms 139896 KB Output is correct
41 Correct 123 ms 139896 KB Output is correct
42 Correct 140 ms 139768 KB Output is correct
43 Correct 137 ms 139896 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 102 ms 139768 KB Output is correct
2 Correct 103 ms 139640 KB Output is correct
3 Correct 108 ms 139768 KB Output is correct
4 Correct 123 ms 139896 KB Output is correct
5 Correct 155 ms 139896 KB Output is correct
6 Correct 153 ms 139896 KB Output is correct
7 Correct 156 ms 139920 KB Output is correct
8 Correct 122 ms 139768 KB Output is correct
9 Correct 122 ms 139768 KB Output is correct
10 Correct 125 ms 140024 KB Output is correct
11 Correct 141 ms 139896 KB Output is correct
12 Correct 134 ms 139768 KB Output is correct
13 Correct 140 ms 139772 KB Output is correct
14 Correct 135 ms 139896 KB Output is correct
15 Correct 170 ms 140024 KB Output is correct
16 Correct 189 ms 140040 KB Output is correct
17 Correct 193 ms 140152 KB Output is correct
18 Correct 191 ms 140024 KB Output is correct
19 Correct 138 ms 139896 KB Output is correct
20 Correct 136 ms 139896 KB Output is correct
21 Correct 138 ms 139884 KB Output is correct
22 Correct 135 ms 139940 KB Output is correct
23 Correct 143 ms 139896 KB Output is correct
24 Correct 122 ms 140024 KB Output is correct
25 Correct 139 ms 139896 KB Output is correct
26 Correct 126 ms 139768 KB Output is correct
27 Correct 139 ms 139872 KB Output is correct
28 Correct 128 ms 139896 KB Output is correct
29 Correct 134 ms 139816 KB Output is correct
30 Correct 155 ms 140024 KB Output is correct
31 Correct 154 ms 139896 KB Output is correct
32 Correct 138 ms 139848 KB Output is correct
33 Correct 127 ms 139772 KB Output is correct
34 Correct 127 ms 139768 KB Output is correct
35 Correct 136 ms 139896 KB Output is correct
36 Correct 132 ms 139896 KB Output is correct
37 Correct 135 ms 139896 KB Output is correct
38 Correct 135 ms 139768 KB Output is correct
39 Correct 141 ms 139896 KB Output is correct
40 Correct 141 ms 139896 KB Output is correct
41 Correct 123 ms 139896 KB Output is correct
42 Correct 140 ms 139768 KB Output is correct
43 Correct 137 ms 139896 KB Output is correct
44 Correct 138 ms 139896 KB Output is correct
45 Correct 325 ms 140252 KB Output is correct
46 Execution timed out 2089 ms 140948 KB Time limit exceeded
47 Halted 0 ms 0 KB -

Subtask #3
0 / 84.0

# 결과 실행 시간 메모리 Grader output
1 Correct 102 ms 139768 KB Output is correct
2 Correct 103 ms 139640 KB Output is correct
3 Correct 108 ms 139768 KB Output is correct
4 Correct 123 ms 139896 KB Output is correct
5 Correct 155 ms 139896 KB Output is correct
6 Correct 153 ms 139896 KB Output is correct
7 Correct 156 ms 139920 KB Output is correct
8 Correct 122 ms 139768 KB Output is correct
9 Correct 122 ms 139768 KB Output is correct
10 Correct 125 ms 140024 KB Output is correct
11 Correct 141 ms 139896 KB Output is correct
12 Correct 134 ms 139768 KB Output is correct
13 Correct 140 ms 139772 KB Output is correct
14 Correct 135 ms 139896 KB Output is correct
15 Correct 170 ms 140024 KB Output is correct
16 Correct 189 ms 140040 KB Output is correct
17 Correct 193 ms 140152 KB Output is correct
18 Correct 191 ms 140024 KB Output is correct
19 Correct 138 ms 139896 KB Output is correct
20 Correct 136 ms 139896 KB Output is correct
21 Correct 138 ms 139884 KB Output is correct
22 Correct 135 ms 139940 KB Output is correct
23 Correct 143 ms 139896 KB Output is correct
24 Correct 122 ms 140024 KB Output is correct
25 Correct 139 ms 139896 KB Output is correct
26 Correct 126 ms 139768 KB Output is correct
27 Correct 139 ms 139872 KB Output is correct
28 Correct 128 ms 139896 KB Output is correct
29 Correct 134 ms 139816 KB Output is correct
30 Correct 155 ms 140024 KB Output is correct
31 Correct 154 ms 139896 KB Output is correct
32 Correct 138 ms 139848 KB Output is correct
33 Correct 127 ms 139772 KB Output is correct
34 Correct 127 ms 139768 KB Output is correct
35 Correct 136 ms 139896 KB Output is correct
36 Correct 132 ms 139896 KB Output is correct
37 Correct 135 ms 139896 KB Output is correct
38 Correct 135 ms 139768 KB Output is correct
39 Correct 141 ms 139896 KB Output is correct
40 Correct 141 ms 139896 KB Output is correct
41 Correct 123 ms 139896 KB Output is correct
42 Correct 140 ms 139768 KB Output is correct
43 Correct 137 ms 139896 KB Output is correct
44 Correct 138 ms 139896 KB Output is correct
45 Correct 325 ms 140252 KB Output is correct
46 Execution timed out 2089 ms 140948 KB Time limit exceeded
47 Halted 0 ms 0 KB -