結果

問題 No.430 文字列検索
ユーザー pop_o
提出日時 2024-09-21 14:32:53
言語 C++23
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 902 ms / 2,000 ms
コード長 2,442 bytes
コンパイル時間 2,923 ms
コンパイル使用メモリ 247,424 KB
実行使用メモリ 5,248 KB
最終ジャッジ日時 2024-11-10 01:13:26
合計ジャッジ時間 11,958 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 4
other AC * 14
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

#include<bits/stdc++.h>
using namespace std;
const uint64_t hashmod = 0x1fffffffffffffff;
const uint64_t base = chrono::duration_cast<chrono::microseconds>(chrono::system_clock::now().time_since_epoch()).count() % hashmod;
const uint64_t mdf = uint64_t(1e17) + 1;
template<typename T>
struct rolling_hash {
int n;
vector<uint64_t> hash, p;
inline uint64_t mul(uint64_t a, uint64_t b) const {
uint64_t a31 = a >> 31, b31 = b >> 31;
a &= 0x7fffffffull; b &= 0x7fffffffull;
uint64_t x = a * b31 + b * a31;
uint64_t res = (a31 * b31 << 1) + (x >> 30) + ((x & 0x3fffffffull) << 31) + a * b;
res = (res >> 61) + (res & hashmod);
if (res >= hashmod) res -= hashmod;
return res;
}
rolling_hash(const T &a) {
n = (int)a.size();
hash.assign(n + 1, 0ull);
p.assign(n + 1, 0ull);
p[0] = 1;
for(int i = 0; i < n; i++) {
p[i + 1] = mul(p[i], base);
hash[i + 1] = mul(hash[i], base) + (mdf + (uint64_t)a[i]);
if(hash[i + 1] >= hashmod) hash[i + 1] -= hashmod;
}
}
// get hashing of S[l, r)
inline uint64_t get(int l, int r) const {
uint64_t res = hash[r] + hashmod - mul(hash[l], p[r - l]);
if (res >= hashmod) res -= hashmod;
return res;
}
// return longest common prefixes of a and b
inline int lcp(const rolling_hash &b, int l1, int r1, int l2, int r2) const {
int size = min(r1 - l1, r2 - l2);
int ok = 0, ng = size + 1;
while(ng - ok > 1) {
int mid = (ok + ng) / 2;
if(get(l1, l1 + mid) == b.get(l2, l2 + mid)) ok = mid;
else ng = mid;
}
return ok;
}
// return hash1 + hash2
inline uint64_t connect(uint64_t hash1, uint64_t hash2, int hash2size) const {
uint64_t res = mul(hash1, p[hash2size]) + hash2;
if (res >= hashmod) res -= hashmod;
return res;
}
};
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
string s;
cin >> s;
rolling_hash h(s);
int m;
cin >> m;
long long ans = 0;
for (int i = 0; i < m; i++) {
string c;
cin >> c;
rolling_hash t(c);
for (int j = 0; j + c.size() <= (int)s.size(); j++) {
if (h.get(j, j+(c.size())) == t.get(0, (int) c.size())) ans++;
}
}
cout << ans << "\n";
}
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