Submission #1032051

#	Time	Username	Problem	Language	Result	Execution time	Memory
1032051		vjudge1	Selling RNA Strands (JOI16_selling_rna)	C++14	100 / 100	211 ms	201300 KiB

selling_rna

#include <bits/stdc++.h>
#define endl '\n'
#define fi first
#define se second
using namespace std;
typedef long long ll;

const int N=1e5+5;

string s[N];
int valchild[255];

struct trie
{
    trie *child[4];
    int l,r,cn;
    trie()
    {
        for(int i=0;i<4;i++) child[i]=NULL;
        l=N,r=-N,cn=0;
    }
} *root;

void ins(string &s,int idx)
{
    trie *p=root;
    for(int i=0;i<(int)s.size();i++)
    {
        int c=valchild[(int)s[i]];
        if(p->child[c]==NULL) p->child[c]=new trie();
        p=p->child[c];
        p->l=min(p->l,idx);
        p->r=max(p->r,idx);
    }
    p->cn++;
}

string tempdfs="";
int idxdfs=0;
void dfs(trie *p)
{
    for(int i=0;i<(int)p->cn;i++) s[++idxdfs]=tempdfs;
    for(int i=0;i<4;i++) if(p->child[i]!=NULL)
    {
        if(i==0) tempdfs.push_back('A');
        else if(i==1) tempdfs.push_back('C');
        else if(i==2) tempdfs.push_back('G');
        else tempdfs.push_back('U');
        dfs(p->child[i]);
        tempdfs.pop_back();
    }
    delete p;
}

pair<int,int> get(string &s)
{
    trie *p=root;
    for(int i=0;i<(int)s.size();i++)
    {
        int c=valchild[(int)s[i]];
        if(p->child[c]==NULL) return {-1,-1};
        p=p->child[c];
    }
    return {p->l,p->r};
}

struct trie2
{
    trie2 *child[4];
    vector<int> v;
    trie2()
    {
        for(int i=0;i<4;i++) child[i]=NULL;
        v.clear();
    }
} *root2;

void ins2(string &s,int idx)
{
    trie2 *p=root2;
    for(int i=0;i<(int)s.size();i++)
    {
        int c=valchild[(int)s[i]];
        if(p->child[c]==NULL) p->child[c]=new trie2();
        p=p->child[c];
        p->v.push_back(idx);
    }
}

int get2(pair<int,int> range,string &s)
{
    trie2 *p=root2;
    for(int i=0;i<(int)s.size();i++)
    {
        int c=valchild[(int)s[i]];
        if(p->child[c]==NULL) return 0;
        p=p->child[c];
    }
    int r=upper_bound(p->v.begin(),p->v.end(),range.se)-p->v.begin(),l=lower_bound(p->v.begin(),p->v.end(),range.fi)-p->v.begin();
    return r-l;
}

void solve()
{
    int n,q;
    cin >> n >> q;
    valchild['A']=0;valchild['C']=1;valchild['G']=2;valchild['U']=3;
    root=new trie();
    for(int i=1;i<=n;i++)
    {
        cin >> s[i];
        ins(s[i],-1);
    }
    dfs(root);
    root=new trie();
    root2=new trie2();
    for(int i=1;i<=n;i++)
    {
        ins(s[i],i);
        reverse(s[i].begin(),s[i].end());
        ins2(s[i],i);
    }
    while(q--)
    {
        string s,t;
        cin >> s >> t;
        reverse(t.begin(),t.end());
        pair<int,int> range=get(s);
        if(range.fi==range.se&&range.fi==-1) cout << 0 << endl;
        else cout << get2(range,t) << endl;
    }
}

int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    //freopen("hanhhhh.inp","r",stdin);
    //freopen("hanhhhh.out","w",stdout);
    int t=1;
    //cin >> t;
    while(t--) solve();
    return 0;
}

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