Submission #784850

#	Time	Username	Problem	Language	Result	Execution time	Memory
784850		vjudge1	Selling RNA Strands (JOI16_selling_rna)	C++17	0 / 100	166 ms	1800 KiB

selling_rna

#include <bits/stdc++.h>
using namespace std;
struct Prefix{
    Prefix* nxt[4];
    int Min = numeric_limits<int>::max(), Max = numeric_limits<int>::min();
};
struct Suffix{
    Suffix* nxt[4];
    vector<int> indices;
};
static inline int idx(const char& ch){
    if (ch == 'A') return 0;
    if (ch == 'C') return 1;
    if (ch == 'G') return 2;
    if (ch == 'U') return 3;
    return -1;
}
void add_str(Prefix* root, const string &s, int idc){
    Prefix* tmp = root;
    tmp->Min = min(tmp->Min, idc);
    tmp->Max = max(tmp->Max, idc);
    for (const char &ch : s){
        assert(idx(ch) >= 0);
        if (tmp->nxt[idx(ch)] == nullptr){
            tmp->nxt[idx(ch)] = new Prefix;
        }
        tmp = tmp->nxt[idx(ch)];
        tmp->Min = min(tmp->Min, idc);
        tmp->Max = max(tmp->Max, idc);
    }
}
void add_str(Suffix* root, const string &s, int idc){
    Suffix* tmp = root;
    tmp->indices.push_back(idc);
    for (int i = s.size() - 1; i >= 0; i--){
        const char &ch = s[i];
        assert(idx(ch) >= 0);
        if (tmp->nxt[idx(ch)] == nullptr){
            tmp->nxt[idx(ch)] = new Suffix;
        }
        tmp = tmp->nxt[idx(ch)];
        tmp->indices.push_back(idc);
    }
}
pair<int, int> find_str(Prefix* root, const string &s){
    Prefix* tmp = root;
    for (const char &ch : s){
        assert(idx(ch) >= 0);
        if (tmp->nxt[idx(ch)] == nullptr) return {-1, -1};
        tmp = tmp->nxt[idx(ch)];
    }
    return {tmp->Min, tmp->Max};
}
vector<int> find_str(Suffix* root, const string &s){
    Suffix* tmp = root;
    for (int i = s.size() - 1; i >= 0; i--){
        const char &ch = s[i];
        assert(idx(ch) >= 0);
        if (tmp->nxt[idx(ch)] == nullptr) return {};
        tmp = tmp->nxt[idx(ch)];
    }
    return tmp->indices;
}
int main() {
    Suffix *triesuf = new Suffix;
    Prefix *triepref = new Prefix;
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < n; i++){
        string s;
        cin >> s;
        add_str(triesuf, s, i);
        add_str(triepref, s, i);
    }
    for (int i = 0; i < m; i++){
        string p, q;
        cin >> p >> q;
        vector<int> a = find_str(triesuf, q);
        pair<int, int> lol = find_str(triepref, p);
        if (a.empty()){
            cout << 0 << endl;
            continue;
        }
        if (lol.first == -1){
            cout << 0 << endl;
            continue;
        }
        auto it = lower_bound(a.begin(), a.end(), lol.first);
        auto jt = upper_bound(a.begin(), a.end(), lol.second);
        int res = jt - it;
        cout << res << endl;
    }
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 40