結果
| 問題 |
No.430 文字列検索
|
| コンテスト | |
| ユーザー |
idat_50me
|
| 提出日時 | 2023-10-04 01:05:43 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,389 bytes |
| コンパイル時間 | 2,147 ms |
| コンパイル使用メモリ | 205,932 KB |
| 最終ジャッジ日時 | 2025-02-17 04:13:40 |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | -- * 4 |
| other | AC * 1 TLE * 1 -- * 12 |
ソースコード
#line 1 "test/yuki_0430.test.cpp"
#define PROBLEM "https://yukicoder.me/problems/no/430"
#ifndef call_include
#define call_include
#include <bits/stdc++.h>
using namespace std;
#endif
#line 2 "string/rolling_hash.cpp"
#ifndef call_include
#define call_include
#include <bits/stdc++.h>
using namespace std;
#endif
#line 2 "math/montgomery.cpp"
#ifndef call_include
#define call_include
#include <bits/stdc++.h>
using namespace std;
#endif
struct Montgomery {
const long long P;
const int R_bit = 32;
const long long R = (1ll << R_bit);
const long long R2;
long long P2 = 0;
const long long mask = (1ll << R_bit) - 1;
Montgomery(const long long mod) : P(mod), R2(R % P * R % P) {
long long t = 0, vi = 1;
int ni = R_bit;
while(ni--) {
if((t & 1) == 0) {
t += P;
P2 += vi;
}
t >>= 1;
vi <<= 1;
}
}
long long reduction(long long x) {
unsigned long long ret = x * P2;
ret &= mask;
ret *= P;
ret += x;
ret >>= R_bit;
if(ret >= P) ret -= P;
return ret;
}
long long conv_mg(long long x) {
return reduction(x * R2);
}
long long mul(long long a, long long b) {
return reduction(reduction(a * b) * R2);
}
};
#line 10 "string/rolling_hash.cpp"
struct RollingHash {
private:
const int N;
const long long MOD1 = 1000000007;
const long long MOD2 = 1992732529;
Montgomery mg1 = Montgomery(MOD1);
Montgomery mg2 = Montgomery(MOD2);
long long base1, base2, base1_mg, base2_mg;
vector<long long> hash1, hash2, pw1, pw2;
public:
RollingHash(string &s) :
N(s.size()),
hash1(N + 1, 0),
hash2(N + 1, 0),
pw1(N + 1, mg1.conv_mg(1)),
pw2(N + 1, mg2.conv_mg(1)) {
random_device rd;
mt19937 mt(rd());
uniform_int_distribution<long long> dist1(257, MOD1 - 2);
uniform_int_distribution<long long> dist2(257, MOD2 - 2);
base1 = dist1(mt);
base2 = dist2(mt);
base1_mg = mg1.conv_mg(base1);
base2_mg = mg2.conv_mg(base2);
for(int i = 0; i < N; i++) {
pw1[i + 1] = mg1.reduction(pw1[i] * base1_mg);
pw2[i + 1] = mg2.reduction(pw2[i] * base2_mg);
hash1[i + 1] = mg1.reduction(hash1[i] * base1_mg) + int(s[i]);
hash2[i + 1] = mg2.reduction(hash2[i] * base2_mg) + int(s[i]);
if(hash1[i + 1] >= MOD1) hash1[i + 1] -= MOD1;
if(hash2[i + 1] >= MOD2) hash2[i + 1] -= MOD2;
}
}
pair<long long, long long> get(int l, int r) {
assert(l <= r);
assert(0 <= l and r <= N);
long long h1 = hash1[r] - mg1.reduction(hash1[l] * pw1[r - l]);
long long h2 = hash2[r] - mg2.reduction(hash2[l] * pw2[r - l]);
if(h1 < 0) h1 += MOD1;
if(h2 < 0) h2 += MOD2;
return pair(h1, h2);
}
vector<int> iscontain(string &t) {
const int M = t.size();
if(N < M) return {};
vector<int> ret;
long long h1_t = 0, h2_t = 0;
for(int i = 0; i < M; i++) {
h1_t = mg1.reduction(h1_t * base1_mg) + int(t[i]);
h2_t = mg2.reduction(h2_t * base2_mg) + int(t[i]);
if(h1_t >= MOD1) h1_t -= MOD1;
if(h2_t >= MOD2) h2_t -= MOD2;
}
for(int i = 0; i + M <= N; i++) {
pair<long long, long long> p = get(i, i + M);
if(p.first == h1_t and p.second == h2_t) ret.emplace_back(i);
}
return ret;
}
};
#line 10 "test/yuki_0430.test.cpp"
int main() {
string S;
int M;
vector<string> C;
cin >> S >> M;
C.resize(M);
for(int i = 0; i < M; i++) cin >> C[i];
RollingHash rh(S);
long long ans = 0;
for(int i = 0; i < M; i++) {
ans += rh.iscontain(C[i]).size();
}
cout << ans << endl;
}
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