Submission #112646

#	Time	Username	Problem	Language	Result	Execution time	Memory
112646		MladenP	Selling RNA Strands (JOI16_selling_rna)	C++17	35 / 100	1561 ms	207344 KiB

selling_rna

#include<bits/stdc++.h>
#define STIZE(x) fprintf(stderr, "STIZE%d\n", x);
#define PRINT(x) fprintf(stderr, "%s = %d\n", #x, x);
#define NL(x) printf("%c", " \n"[(x)]);
#define lld long long
#define pii pair<int,int>
#define pb push_back
#define fi first
#define se second
#define mid (l+r)/2
#define endl '\n'
#define all(a) begin(a),end(a)
#define sz(a) int((a).size())
#define LINF 1000000000000000LL
#define INF 1000000000
#define EPS 1e-9
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
using namespace std;
#define MAXL 2000001
#define MAXN 100010
#define MOD 29996224275833LL
int trie[MAXL][4], siz[MAXL], idx[MAXL], nodes, timer, hshidx, key, f[300];
bool sorted[MAXL];
vector<int> gde[MAXL], inNode[MAXL];
unordered_map<int,int> cudo, celi;
lld hsh[MAXN], hsh1[MAXN], st[MAXN];
string P, Q, S;
inline void ubaci(string &s) {
    int node = 0;
    for(int idx = 0; idx < sz(s); idx++) {
        int c = f[s[idx]];
        if(trie[node][c] == 0) trie[node][c] = ++nodes;
        inNode[node].pb(hsh[sz(s)-1-idx]);
        node = trie[node][c];
    }
}
stack<int> dfsq;
inline int DFS(int node) {
    dfsq.push(node);
    while(!dfsq.empty()) {
        int top = dfsq.top();
        if(idx[top] == 0) {
            idx[top] = ++timer;
            for(auto x : inNode[top]) gde[x].pb(idx[top]);
            for(int i = 0; i < 4; i++) if(trie[top][i]) dfsq.push(trie[top][i]);
        } else {
            dfsq.pop();
            siz[top] = 1;
            for(int i = 0; i < 4; i++) if(trie[top][i]) siz[top] += siz[trie[top][i]];
        }
    }
}
inline void hashuj(string &s, lld hsh[], int lens) {
    fill(hsh, hsh+lens+5, 0);
    hsh[0] = 0;
    for(int i = lens-1, ob = 0; i >= 0; i--, ob++) {
        hsh[ob] += st[ob]*(f[s[i]]+1);
        //hsh[ob+1] = 0;
        hsh[ob+1] = hsh[ob];
        if(hsh[ob] >= MOD) hsh[ob] %= MOD;
        //hsh[ob+1] = hsh[ob];
        if(i == 0) celi[hsh[ob]]++;
        if(cudo[hsh[ob]] == 0) cudo[hsh[ob]] = ++hshidx;
        hsh[ob] = cudo[hsh[ob]];
    }
}
inline void hashuj1(string &s, lld hsh[], int lens) {
    fill(hsh, hsh+lens+5, 0);
    hsh[0] = 0;
    for(int i = lens-1, ob = 0; i >= 0; i--, ob++) {
        hsh[ob] += st[ob]*(f[s[i]]+1);
        //hsh[ob+1] = 0;
        hsh[ob+1] = hsh[ob];
        //PRINT(hsh[ob]);
        if(hsh[ob] >= MOD) hsh[ob] %= MOD;
        //hsh[ob+1] = hsh[ob];
    }
}
inline int query(string &s) {
    int node = 0;
    for(int idxx = 0; idxx < sz(s); idxx++) {
        int c = f[s[idxx]];
        if(trie[node][c] == 0) return -1;
        node = trie[node][c];
    }
    return node;
}
int main() {
     ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int N, M; cin >> N >> M;
    f['A'] = 0, f['G'] = 1, f['C'] = 2, f['U'] = 3, st[0] = 1;
    for(int i = 1; i < MAXN; i++) st[i] = (st[i-1]*5 >= MOD ? (st[i-1]*5)%MOD : st[i-1]*5);
    for(int i = 1; i <= N; i++) {
        cin >> S;
        int lenS = sz(S);
        hashuj(S, hsh, lenS);
        ubaci(S);
    }
    DFS(0);
    for(int q = 0; q < M; q++) {
        int rez = 0;
        cin >> P >> Q;
        int lenQ = sz(Q), lenP = sz(P);
        hashuj1(Q, hsh, lenQ); key = cudo[hsh[lenQ-1]];
        int koji = query(P);
        if(key == 0 || koji == -1) {
            cout << 0 << endl;
            continue;
        }
        /*if(!sorted[key]) {
            for(int i = 0; i < sz(gde[key]); i++) gde[key][i] = idx[gde[key][i]];
            sort(all(gde[key]));
            sorted[key] = 1;
        }*/
        hashuj1(P, hsh1, lenP);
        for(int i = 0; i < lenQ; i++) {
            if(hsh[lenQ-1] - hsh[lenQ-2-i] == hsh1[i]*st[lenQ-i-1]) {
                lld cur = hsh1[lenP-1]*st[lenQ-i-1] + hsh[lenQ-2-i];
                rez += celi[cur];
            }
        }
        rez += upper_bound(all(gde[key]), idx[koji]+siz[koji]-1) - lower_bound(all(gde[key]), idx[koji]);
        cout << rez << endl;
    }
    return 0;
}

Compilation message (stderr)

selling_rna.cpp: In function 'void ubaci(std::__cxx11::string&)':
selling_rna.cpp:32:25: warning: array subscript has type 'char' [-Wchar-subscripts]
         int c = f[s[idx]];
                         ^
selling_rna.cpp: In function 'int DFS(int)':
selling_rna.cpp:53:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
selling_rna.cpp: In function 'void hashuj(std::__cxx11::string&, long long int*, int)':
selling_rna.cpp:58:34: warning: array subscript has type 'char' [-Wchar-subscripts]
         hsh[ob] += st[ob]*(f[s[i]]+1);
                                  ^
selling_rna.cpp: In function 'void hashuj1(std::__cxx11::string&, long long int*, int)':
selling_rna.cpp:72:34: warning: array subscript has type 'char' [-Wchar-subscripts]
         hsh[ob] += st[ob]*(f[s[i]]+1);
                                  ^
selling_rna.cpp: In function 'int query(std::__cxx11::string&)':
selling_rna.cpp:83:26: warning: array subscript has type 'char' [-Wchar-subscripts]
         int c = f[s[idxx]];
                          ^

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