oj.uz

Submission #362029

# Submission time Handle Problem Language Result Execution time Memory
362029 2021-02-01T15:31:54 Z AlexLuchianov Selling RNA Strands (JOI16_selling_rna) C++14
100 / 100
 313 ms 158572 KB 
#include <iostream>
#include <vector>
#include <cassert>
#include <cmath>
#include <algorithm>

using ll = long long;

#define MIN(a, b) (((a) < (b)) ? (a) : (b))
#define MAX(a, b) (((a) < (b)) ? (b) : (a))

int const sigma = 4;

struct Trie{
  std::vector<int> ids;
  Trie* p[sigma];
  Trie() {
    for(int i = 0; i < sigma; i++)
      p[i] = nullptr;
  }
};

int const bigsigma = 256;
char mp[1 + bigsigma];

void _add(Trie* &root, std::string &s, int pos, int id) {
  if(root == nullptr)
    root = new Trie();

  if(s.size() == pos)
    root->ids.push_back(id);
  else 
    _add(root->p[mp[s[pos]]], s, pos + 1, id);
  
}

void dfs(Trie* &root, int target, std::vector<int> &parc, std::vector<int> &start, std::vector<int> &stop) {

  for(int h = 0; h < root->ids.size(); h++) {
    int id = root->ids[h];
    if(target < id) 
      start[id - 1 - target] = parc.size();
  }

  for(int h = 0; h < root->ids.size(); h++) {
    int id = root->ids[h];
    if(id <= target)
      parc.push_back(id);
  }
  for(int h = 0; h < sigma; h++)
    if(root->p[h] != nullptr)
      dfs(root->p[h], target, parc, start, stop);

  for(int h = 0; h < root->ids.size(); h++) {
    int id = root->ids[h];
    if(target < id) 
      stop[id - 1 - target] = parc.size() - 1;
  }
}

Trie *root = nullptr, *root2 = nullptr;

class FenwickTree{
private:
  int n;
  std::vector<int> aib;
public:
  FenwickTree(int n_) {
    n = n_;
    aib.resize(1 + n);
  }
  void update(int pos, int val) {
    if(pos == 0) {
      aib[0] += val;
      return ;
    }
    for(int x = pos; x <= n; x += (x ^ (x & (x - 1))))
      aib[x] += val;
  }
  int query(int pos) {
    if(pos < 0)
      return 0;
    int result = 0;
    for(int x = pos; 0 < x; x = (x & (x - 1)))
      result += aib[x];
    return result + aib[0];
  }
};
int const nmax = 100000;

int sol[1 + nmax];

int main() {
  mp['A'] = 0;
  mp['G'] = 1;
  mp['C'] = 2;
  mp['U'] = 3;

  int n, q;
  std::cin >> n >> q;
  
  for(int i = 1; i <= n; i++) { 
    std::string s;
    std::cin >> s;
    _add(root, s, 0, i);
    std::reverse(s.begin(), s.end());
    _add(root2, s, 0, i);
  }
  for(int i = 1;i <= q; i++) {
    std::string p, q;
    std::cin >> p >> q;
    std::reverse(q.begin(), q.end());
    _add(root, p, 0, n + i);
    _add(root2, q, 0, n + i);
  }

  std::vector<int> parc1, start1(q), stop1(q);
  std::vector<int> parc2, start2(q), stop2(q);
  std::vector<int> pos1(n + 1);
  
  dfs(root, n, parc1, start1, stop1);
  dfs(root2, n, parc2, start2, stop2);
  

  for(int i = 0; i < n; i++)
    pos1[parc1[i]] = i;
  
  std::vector<std::vector<std::pair<int,int>>> events(1 + n);
  
  for(int i = 0; i < q; i++) {
    if(start2[i] <= stop2[i]) {
      events[stop2[i]].push_back({i, 1});
      if(0 < start2[i]) 
        events[start2[i] - 1].push_back({i, -1});
    }
  }

  FenwickTree aib(1 + n);
  
  for(int i = 0; i < n; i++) {
    aib.update(pos1[parc2[i]], 1);
    for(int h = 0; h < events[i].size(); h++) {
      int id = events[i][h].first;
      sol[id] += events[i][h].second * (aib.query(stop1[id]) - aib.query(start1[id] - 1));
    }
  }
  
  for(int i = 0; i < q; i++)
    std::cout << sol[i] << '\n';
  return 0;
}

Compilation message

selling_rna.cpp: In function 'void _add(Trie*&, std::string&, int, int)':
selling_rna.cpp:30:15: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   30 |   if(s.size() == pos)
      |      ~~~~~~~~~^~~~~~
selling_rna.cpp:33:27: warning: array subscript has type 'char' [-Wchar-subscripts]
   33 |     _add(root->p[mp[s[pos]]], s, pos + 1, id);
      |                           ^
selling_rna.cpp:33:27: warning: array subscript has type 'char' [-Wchar-subscripts]
   33 |     _add(root->p[mp[s[pos]]], s, pos + 1, id);
      |                  ~~~~~~~~~^
selling_rna.cpp: In function 'void dfs(Trie*&, int, std::vector<int>&, std::vector<int>&, std::vector<int>&)':
selling_rna.cpp:39:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   for(int h = 0; h < root->ids.size(); h++) {
      |                  ~~^~~~~~~~~~~~~~~~~~
selling_rna.cpp:45:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   for(int h = 0; h < root->ids.size(); h++) {
      |                  ~~^~~~~~~~~~~~~~~~~~
selling_rna.cpp:54:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |   for(int h = 0; h < root->ids.size(); h++) {
      |                  ~~^~~~~~~~~~~~~~~~~~
selling_rna.cpp: In function 'int main()':
selling_rna.cpp:142:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  142 |     for(int h = 0; h < events[i].size(); h++) {
      |                    ~~^~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 280 ms 128492 KB Output is correct
2 Correct 279 ms 121964 KB Output is correct
3 Correct 280 ms 126828 KB Output is correct
4 Correct 283 ms 120940 KB Output is correct
5 Correct 301 ms 156268 KB Output is correct
6 Correct 304 ms 158572 KB Output is correct
7 Correct 165 ms 6636 KB Output is correct
8 Correct 313 ms 96444 KB Output is correct
9 Correct 297 ms 82028 KB Output is correct
10 Correct 202 ms 77164 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 5824 KB Output is correct
2 Correct 35 ms 4204 KB Output is correct
3 Correct 41 ms 5000 KB Output is correct
4 Correct 36 ms 4332 KB Output is correct
5 Correct 35 ms 4456 KB Output is correct
6 Correct 42 ms 5352 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 280 ms 128492 KB Output is correct
9 Correct 279 ms 121964 KB Output is correct
10 Correct 280 ms 126828 KB Output is correct
11 Correct 283 ms 120940 KB Output is correct
12 Correct 301 ms 156268 KB Output is correct
13 Correct 304 ms 158572 KB Output is correct
14 Correct 165 ms 6636 KB Output is correct
15 Correct 313 ms 96444 KB Output is correct
16 Correct 297 ms 82028 KB Output is correct
17 Correct 202 ms 77164 KB Output is correct
18 Correct 47 ms 5824 KB Output is correct
19 Correct 35 ms 4204 KB Output is correct
20 Correct 41 ms 5000 KB Output is correct
21 Correct 36 ms 4332 KB Output is correct
22 Correct 35 ms 4456 KB Output is correct
23 Correct 42 ms 5352 KB Output is correct
24 Correct 265 ms 106988 KB Output is correct
25 Correct 286 ms 108988 KB Output is correct
26 Correct 260 ms 105204 KB Output is correct
27 Correct 272 ms 105836 KB Output is correct
28 Correct 253 ms 29080 KB Output is correct
29 Correct 164 ms 13880 KB Output is correct