Submission #396534

#	Time	Username	Problem	Language	Result	Execution time	Memory
396534		Sundavar	Selling RNA Strands (JOI16_selling_rna)	C++14	100 / 100	561 ms	344368 KiB

selling_rna

#include <bits/stdc++.h>

using namespace std;
int get(char c){
    if(c == 'A') return 1;
    if(c == 'G') return 2;
    if(c == 'C') return 3;
    return 0;
}
struct node{
    vector<int> to;
    vector<int> veg, pont;
    int cnt = 0;
    node(){
        to.resize(4, -1);
    }
};
vector<node> trie(1), rev(1);
int add(vector<node>& t, string s, int id, bool normal = true){
    int poz = 0;
    for(char& c: s){
        int k = get(c);
        if(t[poz].to[k] == -1){
            t[poz].to[k] = t.size();
            t.push_back(node());
        }
        t[poz = t[poz].to[k]].cnt++;
    }
    if(normal) t[poz].veg.push_back(id);
    else t[poz].pont.push_back(id);
    return poz;
}
vector<int> poz;
vector<int> ans;
vector<string> p,q, revs;
void walk(int curr){
    for(int& a : trie[curr].pont)
        ans[a] -= rev[poz[a]].cnt;
    for(int& a : trie[curr].veg)
        add(rev, revs[a], a);
    for(int& to : trie[curr].to){
        if(to == -1) continue;
        walk(to);
    }
    for(int& a : trie[curr].pont)
        ans[a] += rev[poz[a]].cnt;
}

int main(){
    cin.sync_with_stdio(false);
    cout.sync_with_stdio(false);
    int n,m;
    cin>>n>>m;
    vector<string> s(n);
    for(int i = 0; i < n; i++){
        cin>>s[i];
        add(trie, s[i], i);
        revs.push_back(s[i]), reverse(revs[i].begin(), revs[i].end());
    }
    poz.resize(m), ans.resize(m);
    p.resize(m), q.resize(m);
    for(int i = 0; i < m; i++){
        cin>>p[i]>>q[i];
        reverse(q[i].begin(), q[i].end());
        add(trie, p[i], i, false);
        poz[i] = add(rev, q[i], i, false);
    }
    walk(0);
    for(int& a : ans)
        cout<<a<<"\n";
}

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