結果
| 問題 |
No.430 文字列検索
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-05-17 18:47:26 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 20 ms / 2,000 ms |
| コード長 | 3,400 bytes |
| コンパイル時間 | 2,030 ms |
| コンパイル使用メモリ | 195,548 KB |
| 実行使用メモリ | 10,052 KB |
| 最終ジャッジ日時 | 2024-11-10 00:25:47 |
| 合計ジャッジ時間 | 2,685 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 14 |
ソースコード
#include <bits/stdc++.h>
#define FOR(v, a, b) for(int v = (a); v < (b); ++v)
#define FORE(v, a, b) for(int v = (a); v <= (b); ++v)
#define REP(v, n) FOR(v, 0, n)
#define REPE(v, n) FORE(v, 0, n)
#define REV(v, a, b) for(int v = (a); v >= (b); --v)
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define ITR(it, c) for(auto it = (c).begin(); it != (c).end(); ++it)
#define RITR(it, c) for(auto it = (c).rbegin(); it != (c).rend(); ++it)
#define EXIST(c,x) ((c).find(x) != (c).end())
#define LLI long long int
#define fst first
#define snd second
#define popcount __builtin_popcount
#ifdef DEBUG
#include <misc/C++/Debug.cpp>
#else
#define dump(x) ((void)0)
#endif
#define gcd __gcd
using namespace std;
template <class T> constexpr T lcm(T m, T n){return m/gcd(m,n)*n;}
template <typename I> void join(ostream &ost, I s, I t, string d=" "){for(auto i=s; i!=t; ++i){if(i!=s)ost<<d; ost<<*i;}ost<<endl;}
template <typename T> istream& operator>>(istream &is, vector<T> &v){for(auto &a : v) is >> a; return is;}
template <typename T, typename U> istream& operator>>(istream &is, pair<T,U> &p){is >> p.first >> p.second; return is;}
template <typename T, typename U> bool chmin(T &a, const U &b){return (a>b ? a=b, true : false);}
template <typename T, typename U> bool chmax(T &a, const U &b){return (a<b ? a=b, true : false);}
template <typename T, size_t N, typename U> void fill_array(T (&a)[N], const U &v){fill((U*)a, (U*)(a+N), v);}
class AhoCorasick{
public:
int n;
vector<unordered_map<char,int>> trie;
vector<int> failure_edge;
vector<string> dict;
vector<vector<int>> dict_index;
AhoCorasick(): n(1), trie(1), failure_edge(1){
}
void add(const string &s){
dict.push_back(s);
int cur = 0;
REP(i,(int)s.size()){
char c = s[i];
if(EXIST(trie[cur], c)){
cur = trie[cur][c];
}else{
++n;
trie.resize(n);
trie[cur][c] = n-1;
cur = trie[cur][c];
}
}
dict_index.resize(n);
dict_index[cur].push_back(dict.size()-1);
}
void construct_failure_link(){
failure_edge.resize(n);
queue<int> dq;
dq.push(0);
while(not dq.empty()){
int cur = dq.front(); dq.pop();
for(auto &kv : trie[cur]){
char c = kv.fst;
int next = kv.snd;
if(cur == 0){
failure_edge[next] = 0;
}else{
int i = failure_edge[cur];
int j = 0;
while(1){
if(EXIST(trie[i], c)){
j = trie[i][c];
break;
}else{
if(i == 0) break;
i = failure_edge[i];
}
}
failure_edge[next] = j;
for(auto k : dict_index[failure_edge[next]]){
dict_index[next].push_back(k);
}
}
dq.push(next);
}
}
}
vector<pair<int,int>> find(const string &s){
vector<pair<int,int>> ret;
int cur = 0;
REP(i,(int)s.size()){
char c = s[i];
while(cur != 0 and not EXIST(trie[cur], c)){
cur = failure_edge[cur];
}
cur = trie[cur][c];
for(auto j : dict_index[cur]){
ret.push_back({i, j});
}
}
return ret;
}
};
int main(){
cin.tie(0);
ios::sync_with_stdio(false);
string S;
int M;
while(cin >> S >> M){
vector<string> C(M); cin >> C;
AhoCorasick ac;
REP(i,M){
ac.add(C[i]);
}
ac.construct_failure_link();
auto ret = ac.find(S);
dump(ret);
int ans = ret.size();
cout << ans << endl;
}
return 0;
}