oj.uz

Submission #441073

# Submission time Handle Problem Language Result Execution time Memory
441073 2021-07-04T05:35:28 Z codebuster_10 Selling RNA Strands (JOI16_selling_rna) C++17
100 / 100
 1221 ms 782188 KB 
#include <bits/stdc++.h>

using namespace std;

#define int int64_t //be careful about this 
#define endl "\n"
#define f(i, a, b) for (int i = int(a); i < int(b); ++i)

#define pr pair
#define ar array
#define fr first
#define sc second
#define vt vector
#define pb push_back
#define eb emplace_back

#define SZ(x)((int)(x).size())
#define all(a)(a).begin(), (a).end()
#define allr(a)(a).rbegin(), (a).rend()
#define mem(a, b) memset(a, b, sizeof(a))

void setIO(string s = "") {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  // remove this when size of input is not fixed.
  cin.exceptions(cin.failbit);
  cout.precision(15);
  cout << fixed;
  if (SZ(s)) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
  }
}


template<const int ALPHABET>
    struct prefix_tree {

      struct trie_node {
        int link[ALPHABET];
        vector < int > who;

        trie_node() {
          memset(link, -1, sizeof(link));
        }
      };

      vector < trie_node > trie;

      prefix_tree() {
        trie.emplace_back();
      }

      void create_node(int parent, int c) {
        trie.emplace_back();
      }

      int get_or_create_node(int current, int c) {
        if (trie[current].link[c] < 0) {
          trie[current].link[c] = trie.size();
          create_node(current, c);
        }

        return trie[current].link[c];
      }

      int insert_str(const string & str,
        const int & i) {
        int current = 0;
        for (char c: str) {
          current = get_or_create_node(current, c - 'A');
          trie[current].who.push_back(i);
        }
        return current;
      }

      ar < int, 2 > query(const string & str) {
        int current = 0;
        for (char c: str) {
          if (trie[current].link[c - 'A'] < 0) return ar < int, 2 > {
            -1,
            -1
          };
          current = trie[current].link[c - 'A'];
        }
        return ar < int, 2 > {
          trie[current].who.front(),
          trie[current].who.back()
        };
      }

      int query(const string & str, int L, int R) {
        int current = 0;
        for (char c: str) {
          if (trie[current].link[c - 'A'] < 0) return int(0);
          current = trie[current].link[c - 'A'];
        }
        return int(upper_bound(all(trie[current].who), R) - lower_bound(all(trie[current].who), L));
      }
    };

prefix_tree<26> trie, reverse_trie;

signed main() {
  setIO();
  int n, q;
  cin >> n >> q;
  vt<string> s(n);
  for(auto & _s : s) cin >> _s;
  sort(all(s));

  f(i, 0, n) {
    trie.insert_str(s[i], i);
    reverse(all(s[i]));
    reverse_trie.insert_str(s[i], i);
  }

  while (q--) {
    string p, q;
    cin >> p >> q;
    auto [L, R] = trie.query(p);
    reverse(all(q));
    cout << reverse_trie.query(q, L, R) << endl;
  }

}

Compilation message

selling_rna.cpp: In function 'void setIO(std::string)':
selling_rna.cpp:31:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
selling_rna.cpp:32:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 767 ms 533432 KB Output is correct
2 Correct 761 ms 524756 KB Output is correct
3 Correct 730 ms 524908 KB Output is correct
4 Correct 712 ms 524864 KB Output is correct
5 Correct 1221 ms 782188 KB Output is correct
6 Correct 1150 ms 782048 KB Output is correct
7 Correct 90 ms 34280 KB Output is correct
8 Correct 725 ms 456252 KB Output is correct
9 Correct 641 ms 443580 KB Output is correct
10 Correct 583 ms 419308 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 4052 KB Output is correct
2 Correct 25 ms 5004 KB Output is correct
3 Correct 32 ms 4316 KB Output is correct
4 Correct 22 ms 3376 KB Output is correct
5 Correct 27 ms 4620 KB Output is correct
6 Correct 32 ms 4704 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 767 ms 533432 KB Output is correct
9 Correct 761 ms 524756 KB Output is correct
10 Correct 730 ms 524908 KB Output is correct
11 Correct 712 ms 524864 KB Output is correct
12 Correct 1221 ms 782188 KB Output is correct
13 Correct 1150 ms 782048 KB Output is correct
14 Correct 90 ms 34280 KB Output is correct
15 Correct 725 ms 456252 KB Output is correct
16 Correct 641 ms 443580 KB Output is correct
17 Correct 583 ms 419308 KB Output is correct
18 Correct 31 ms 4052 KB Output is correct
19 Correct 25 ms 5004 KB Output is correct
20 Correct 32 ms 4316 KB Output is correct
21 Correct 22 ms 3376 KB Output is correct
22 Correct 27 ms 4620 KB Output is correct
23 Correct 32 ms 4704 KB Output is correct
24 Correct 714 ms 526512 KB Output is correct
25 Correct 712 ms 526520 KB Output is correct
26 Correct 706 ms 526480 KB Output is correct
27 Correct 681 ms 527284 KB Output is correct
28 Correct 293 ms 96652 KB Output is correct
29 Correct 105 ms 22408 KB Output is correct