oj.uz

Submission #234691

# Submission time Handle Problem Language Result Execution time Memory
234691 2020-05-25T07:58:29 Z AlexLuchianov Construction of Highway (JOI18_construction) C++14
7 / 100
 2000 ms 140932 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 && 0 < st[chain].size())
      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

# Verdict Execution time Memory Grader output
1 Correct 99 ms 139768 KB Output is correct
2 Correct 112 ms 139640 KB Output is correct
3 Correct 112 ms 139768 KB Output is correct
4 Correct 124 ms 139840 KB Output is correct
5 Correct 152 ms 139896 KB Output is correct
6 Correct 130 ms 139896 KB Output is correct
7 Correct 154 ms 139896 KB Output is correct
8 Correct 124 ms 139896 KB Output is correct
9 Correct 123 ms 139896 KB Output is correct
10 Correct 123 ms 139896 KB Output is correct
11 Correct 142 ms 139896 KB Output is correct
12 Correct 135 ms 139896 KB Output is correct
13 Correct 139 ms 139896 KB Output is correct
14 Correct 134 ms 139896 KB Output is correct
15 Correct 179 ms 140064 KB Output is correct
16 Correct 192 ms 140024 KB Output is correct
17 Correct 192 ms 139920 KB Output is correct
18 Correct 194 ms 140156 KB Output is correct
19 Correct 138 ms 139896 KB Output is correct
20 Correct 138 ms 139896 KB Output is correct
21 Correct 138 ms 139896 KB Output is correct
22 Correct 143 ms 139768 KB Output is correct
23 Correct 149 ms 139768 KB Output is correct
24 Correct 153 ms 139876 KB Output is correct
25 Correct 157 ms 139896 KB Output is correct
26 Correct 127 ms 139768 KB Output is correct
27 Correct 127 ms 139984 KB Output is correct
28 Correct 129 ms 139768 KB Output is correct
29 Correct 135 ms 139896 KB Output is correct
30 Correct 175 ms 139896 KB Output is correct
31 Correct 155 ms 139880 KB Output is correct
32 Correct 137 ms 139768 KB Output is correct
33 Correct 124 ms 139768 KB Output is correct
34 Correct 136 ms 139768 KB Output is correct
35 Correct 140 ms 139768 KB Output is correct
36 Correct 138 ms 139768 KB Output is correct
37 Correct 136 ms 139896 KB Output is correct
38 Correct 141 ms 139768 KB Output is correct
39 Correct 134 ms 139896 KB Output is correct
40 Correct 141 ms 139896 KB Output is correct
41 Correct 142 ms 140072 KB Output is correct
42 Correct 136 ms 139892 KB Output is correct
43 Correct 136 ms 139896 KB Output is correct
44 Correct 137 ms 139896 KB Output is correct

Subtask #2
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 139768 KB Output is correct
2 Correct 112 ms 139640 KB Output is correct
3 Correct 112 ms 139768 KB Output is correct
4 Correct 124 ms 139840 KB Output is correct
5 Correct 152 ms 139896 KB Output is correct
6 Correct 130 ms 139896 KB Output is correct
7 Correct 154 ms 139896 KB Output is correct
8 Correct 124 ms 139896 KB Output is correct
9 Correct 123 ms 139896 KB Output is correct
10 Correct 123 ms 139896 KB Output is correct
11 Correct 142 ms 139896 KB Output is correct
12 Correct 135 ms 139896 KB Output is correct
13 Correct 139 ms 139896 KB Output is correct
14 Correct 134 ms 139896 KB Output is correct
15 Correct 179 ms 140064 KB Output is correct
16 Correct 192 ms 140024 KB Output is correct
17 Correct 192 ms 139920 KB Output is correct
18 Correct 194 ms 140156 KB Output is correct
19 Correct 138 ms 139896 KB Output is correct
20 Correct 138 ms 139896 KB Output is correct
21 Correct 138 ms 139896 KB Output is correct
22 Correct 143 ms 139768 KB Output is correct
23 Correct 149 ms 139768 KB Output is correct
24 Correct 153 ms 139876 KB Output is correct
25 Correct 157 ms 139896 KB Output is correct
26 Correct 127 ms 139768 KB Output is correct
27 Correct 127 ms 139984 KB Output is correct
28 Correct 129 ms 139768 KB Output is correct
29 Correct 135 ms 139896 KB Output is correct
30 Correct 175 ms 139896 KB Output is correct
31 Correct 155 ms 139880 KB Output is correct
32 Correct 137 ms 139768 KB Output is correct
33 Correct 124 ms 139768 KB Output is correct
34 Correct 136 ms 139768 KB Output is correct
35 Correct 140 ms 139768 KB Output is correct
36 Correct 138 ms 139768 KB Output is correct
37 Correct 136 ms 139896 KB Output is correct
38 Correct 141 ms 139768 KB Output is correct
39 Correct 134 ms 139896 KB Output is correct
40 Correct 141 ms 139896 KB Output is correct
41 Correct 142 ms 140072 KB Output is correct
42 Correct 136 ms 139892 KB Output is correct
43 Correct 136 ms 139896 KB Output is correct
44 Correct 137 ms 139896 KB Output is correct
45 Correct 326 ms 140320 KB Output is correct
46 Execution timed out 2092 ms 140932 KB Time limit exceeded
47 Halted 0 ms 0 KB -

Subtask #3
0 / 84.0

# Verdict Execution time Memory Grader output
1 Correct 99 ms 139768 KB Output is correct
2 Correct 112 ms 139640 KB Output is correct
3 Correct 112 ms 139768 KB Output is correct
4 Correct 124 ms 139840 KB Output is correct
5 Correct 152 ms 139896 KB Output is correct
6 Correct 130 ms 139896 KB Output is correct
7 Correct 154 ms 139896 KB Output is correct
8 Correct 124 ms 139896 KB Output is correct
9 Correct 123 ms 139896 KB Output is correct
10 Correct 123 ms 139896 KB Output is correct
11 Correct 142 ms 139896 KB Output is correct
12 Correct 135 ms 139896 KB Output is correct
13 Correct 139 ms 139896 KB Output is correct
14 Correct 134 ms 139896 KB Output is correct
15 Correct 179 ms 140064 KB Output is correct
16 Correct 192 ms 140024 KB Output is correct
17 Correct 192 ms 139920 KB Output is correct
18 Correct 194 ms 140156 KB Output is correct
19 Correct 138 ms 139896 KB Output is correct
20 Correct 138 ms 139896 KB Output is correct
21 Correct 138 ms 139896 KB Output is correct
22 Correct 143 ms 139768 KB Output is correct
23 Correct 149 ms 139768 KB Output is correct
24 Correct 153 ms 139876 KB Output is correct
25 Correct 157 ms 139896 KB Output is correct
26 Correct 127 ms 139768 KB Output is correct
27 Correct 127 ms 139984 KB Output is correct
28 Correct 129 ms 139768 KB Output is correct
29 Correct 135 ms 139896 KB Output is correct
30 Correct 175 ms 139896 KB Output is correct
31 Correct 155 ms 139880 KB Output is correct
32 Correct 137 ms 139768 KB Output is correct
33 Correct 124 ms 139768 KB Output is correct
34 Correct 136 ms 139768 KB Output is correct
35 Correct 140 ms 139768 KB Output is correct
36 Correct 138 ms 139768 KB Output is correct
37 Correct 136 ms 139896 KB Output is correct
38 Correct 141 ms 139768 KB Output is correct
39 Correct 134 ms 139896 KB Output is correct
40 Correct 141 ms 139896 KB Output is correct
41 Correct 142 ms 140072 KB Output is correct
42 Correct 136 ms 139892 KB Output is correct
43 Correct 136 ms 139896 KB Output is correct
44 Correct 137 ms 139896 KB Output is correct
45 Correct 326 ms 140320 KB Output is correct
46 Execution timed out 2092 ms 140932 KB Time limit exceeded
47 Halted 0 ms 0 KB -