oj.uz

Submission #982682

# Submission time Handle Problem Language Result Execution time Memory
982682 2024-05-14T15:59:57 Z kh0i Selling RNA Strands (JOI16_selling_rna) C++17
100 / 100
 178 ms 160164 KB 
#include "bits/stdc++.h"
using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...)
#endif

using ll = long long;
using pii = pair<int, int>;

#define F first
#define S second
#define sz(x) (int)((x).size())
#define all(x) (x).begin(), (x).end()

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll get_rand(ll l, ll r) {
    assert(l <= r);
    return uniform_int_distribution<ll> (l, r)(rng);
}

int get(char c){
    if(c == 'A') return 0;
    if(c == 'G') return 1;
    if(c == 'C') return 2;
    return 3;
}

struct Trie{
    struct Node{
        int nxt[4];
        int l, r;
        Node(){
            memset(nxt, -1, sizeof(nxt));
            l = 1e9, r = -1;
        }
    };

    vector<Node> tr;
    int cur = 0;

    Trie(){
        tr.push_back(Node());
    }

    int new_node(){
        tr.push_back(Node());
        ++cur;
        return cur;
    }

    void add_string(string &s, int id){
        int p = 0;
        for(int i = 0; i < sz(s); ++i){
            tr[p].l = min(tr[p].l, id);
            tr[p].r = max(tr[p].r, id);

            int c = get(s[i]);
            if(tr[p].nxt[c] == -1)
                tr[p].nxt[c] = new_node();
            p = tr[p].nxt[c];
        }

        tr[p].l = min(tr[p].l, id);
        tr[p].r = max(tr[p].r, id);
    }

    pii get_range(string &s){
        int p = 0;
        for(int i = 0; i < sz(s); ++i){
            int c = get(s[i]);
            if(tr[p].nxt[c] == -1)
                return {-1, -1};
            p = tr[p].nxt[c];
        }
        return {tr[p].l, tr[p].r};
    }
};

struct ReversedTrie{
    struct Node{
        int nxt[4];
        vector<int> ids;
        Node(){
            memset(nxt, -1, sizeof(nxt));
        }
    };

    vector<Node> tr;
    int cur = 0;

    ReversedTrie(){
        tr.push_back(Node());
    }

    int new_node(){
        tr.push_back(Node());
        ++cur;
        return cur;
    }

    void add_string(string &s, int id){
        int p = 0;
        for(int i = 0; i < sz(s); ++i){
            tr[p].ids.push_back(id);
            int c = get(s[i]);
            if(tr[p].nxt[c] == -1)
                tr[p].nxt[c] = new_node();
            p = tr[p].nxt[c];
        }
        tr[p].ids.push_back(id);
    }

    void init(){
        for(int i = 0; i <= cur; ++i)
            sort(all(tr[cur].ids));
    }

    int query(string &s, int l, int r){
        int p = 0;
        for(int i = 0; i < sz(s); ++i){
            int c = get(s[i]);
            if(tr[p].nxt[c] == -1)
                return 0;
            p = tr[p].nxt[c];
        }
        int lv = lower_bound(all(tr[p].ids), l) - tr[p].ids.begin();
        int rv = upper_bound(all(tr[p].ids), r) - tr[p].ids.begin() - 1;
        return rv - lv + 1;
    }
};

const int N = 1e5 + 3;

int n, m;
string s[N];
Trie trie;
ReversedTrie rtrie;

void solve(){
    cin >> n >> m;
    for(int i = 1; i <= n; ++i)
        cin >> s[i];
    sort(s + 1, s + n + 1);
    for(int i = 1; i <= n; ++i){
        trie.add_string(s[i], i);
        reverse(all(s[i]));
    }
    for(int i = 1; i <= n; ++i)
        rtrie.add_string(s[i], i);

    while(m--){
        string p, q;
        cin >> p >> q;
        reverse(all(q));
        pii rn = trie.get_range(p);
        cout << rtrie.query(q, rn.F, rn.S) << '\n';
    }
}

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(0);
    #define task "troll"
    if(fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    int test = 1;
//    cin >> test;
    for(int i = 1; i <= test; ++i){
//        cout << "Case #" << i << ": ";
        solve();
    }
    #ifdef LOCAL
        cerr << "\n[Time]: " << 1000.0 * clock() / CLOCKS_PER_SEC << " ms.\n";
    #endif
    return 0;
}

Compilation message

selling_rna.cpp: In function 'int32_t main()':
selling_rna.cpp:167:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  167 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
selling_rna.cpp:168:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  168 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3416 KB Output is correct
2 Correct 1 ms 3420 KB Output is correct
3 Correct 1 ms 3420 KB Output is correct
4 Correct 1 ms 3416 KB Output is correct
5 Correct 1 ms 3416 KB Output is correct
6 Correct 2 ms 3672 KB Output is correct
7 Correct 1 ms 3420 KB Output is correct

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 172 ms 144276 KB Output is correct
2 Correct 174 ms 140812 KB Output is correct
3 Correct 70 ms 66896 KB Output is correct
4 Correct 76 ms 65432 KB Output is correct
5 Correct 146 ms 158112 KB Output is correct
6 Correct 146 ms 160164 KB Output is correct
7 Correct 44 ms 19028 KB Output is correct
8 Correct 134 ms 87912 KB Output is correct
9 Correct 118 ms 84700 KB Output is correct
10 Correct 90 ms 86440 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 4568 KB Output is correct
2 Correct 19 ms 4788 KB Output is correct
3 Correct 18 ms 4824 KB Output is correct
4 Correct 14 ms 4820 KB Output is correct
5 Correct 15 ms 4724 KB Output is correct
6 Correct 19 ms 4824 KB Output is correct

Subtask #4
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3416 KB Output is correct
2 Correct 1 ms 3420 KB Output is correct
3 Correct 1 ms 3420 KB Output is correct
4 Correct 1 ms 3416 KB Output is correct
5 Correct 1 ms 3416 KB Output is correct
6 Correct 2 ms 3672 KB Output is correct
7 Correct 1 ms 3420 KB Output is correct
8 Correct 172 ms 144276 KB Output is correct
9 Correct 174 ms 140812 KB Output is correct
10 Correct 70 ms 66896 KB Output is correct
11 Correct 76 ms 65432 KB Output is correct
12 Correct 146 ms 158112 KB Output is correct
13 Correct 146 ms 160164 KB Output is correct
14 Correct 44 ms 19028 KB Output is correct
15 Correct 134 ms 87912 KB Output is correct
16 Correct 118 ms 84700 KB Output is correct
17 Correct 90 ms 86440 KB Output is correct
18 Correct 19 ms 4568 KB Output is correct
19 Correct 19 ms 4788 KB Output is correct
20 Correct 18 ms 4824 KB Output is correct
21 Correct 14 ms 4820 KB Output is correct
22 Correct 15 ms 4724 KB Output is correct
23 Correct 19 ms 4824 KB Output is correct
24 Correct 165 ms 123444 KB Output is correct
25 Correct 178 ms 123236 KB Output is correct
26 Correct 158 ms 123452 KB Output is correct
27 Correct 81 ms 57756 KB Output is correct
28 Correct 127 ms 36100 KB Output is correct
29 Correct 56 ms 12356 KB Output is correct