結果
| 問題 |
No.430 文字列検索
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-01-30 19:39:07 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 346 ms / 2,000 ms |
| コード長 | 3,772 bytes |
| コンパイル時間 | 1,470 ms |
| コンパイル使用メモリ | 140,900 KB |
| 最終ジャッジ日時 | 2025-01-18 09:57:38 |
|
ジャッジサーバーID (参考情報) |
judge2 / 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 <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <queue>
#include <string>
#include <map>
#include <set>
#include <stack>
#include <tuple>
#include <deque>
#include <array>
#include <numeric>
#include <bitset>
#include <iomanip>
#include <cassert>
#include <chrono>
#include <random>
#include <limits>
#include <iterator>
#include <functional>
#include <sstream>
#include <fstream>
#include <complex>
#include <cstring>
#include <unordered_map>
#include <unordered_set>
using namespace std;
using ll = long long;
constexpr int INF = 1001001001;
constexpr int mod = 1000000007;
// constexpr int mod = 998244353;
template<class T>
inline bool chmax(T& x, T y){
if(x < y){
x = y;
return true;
}
return false;
}
template<class T>
inline bool chmin(T& x, T y){
if(x > y){
x = y;
return true;
}
return false;
}
struct RollingHash {
static const uint64_t MOD = (1ull << 61) - 1;
static const uint64_t MASK30 = (1ull << 30) - 1;
static const uint64_t MASK31 = (1ull << 31) - 1;
static const uint64_t MASK61 = MOD;
vector< uint64_t > hashed, power;
const uint64_t base;
static inline uint64_t add(uint64_t a, uint64_t b) {
if((a += b) >= MOD) a -= MOD;
return a;
}
static inline uint64_t mul(uint64_t a, uint64_t b) {
uint64_t LA = a >> 31;
uint64_t RA = a & MASK31;
uint64_t LB = b >> 31;
uint64_t RB = b & MASK31;
uint64_t M = RA * LB + LA * RB;
uint64_t LM = M >> 30;
uint64_t RM = M & MASK30;
return CalcMod(LA * LB * 2 + LM + (RM << 31) + RA * RB);
}
static inline uint64_t CalcMod(uint64_t X){
uint64_t LX = X >> 61;
uint64_t RX = X & MASK61;
uint64_t res = LX + RX;
if (res >= MOD) res -= MOD;
return res;
}
static inline uint64_t generate_base() {
mt19937_64 mt(chrono::steady_clock::now().time_since_epoch().count());
uniform_int_distribution< uint64_t > rand(1, RollingHash::MOD - 1);
return rand(mt);
}
RollingHash() = default;
RollingHash(const string &s, uint64_t base) : base(base) {
size_t sz = s.size();
hashed.assign(sz + 1, 0);
power.assign(sz + 1, 0);
power[0] = 1;
for(int i = 0; i < sz; i++) {
power[i + 1] = mul(power[i], base);
hashed[i + 1] = add(mul(hashed[i], base), s[i]);
}
}
template< typename T >
RollingHash(const vector< T > &s, uint64_t base) : base(base) {
size_t sz = s.size();
hashed.assign(sz + 1, 0);
power.assign(sz + 1, 0);
power[0] = 1;
for(int i = 0; i < sz; i++) {
power[i + 1] = mul(power[i], base);
hashed[i + 1] = add(mul(hashed[i], base), s[i]);
}
}
uint64_t query(int l, int r) const {
return add(hashed[r], MOD - mul(hashed[l], power[r - l]));
}
uint64_t combine(uint64_t h1, uint64_t h2, size_t h2len) const {
return add(mul(h1, power[h2len]), h2);
}
int lcp(const RollingHash &b, int l1, int r1, int l2, int r2) const {
assert(base == b.base);
int len = min(r1 - l1, r2 - l2);
int low = 0, high = len + 1;
while(high - low > 1) {
int mid = (low + high) / 2;
if(query(l1, l1 + mid) == b.query(l2, l2 + mid)) low = mid;
else high = mid;
}
return low;
}
};
int main(){
ios::sync_with_stdio(false);
cin.tie(nullptr);
string S;
int M;
cin >> S >> M;
auto B = RollingHash::generate_base();
auto rhs = RollingHash(S, B);
map<int64_t, int64_t> cnt;
int N = S.length();
for(int i = 0; i < N; ++i){
for(int k = 1; k <= 10; ++k){
if(i + k > N) break;
cnt[rhs.query(i, i + k)] += 1;
}
}
int64_t ans = 0;
for(int i = 0; i < M; ++i){
string T;
cin >> T;
auto rht = RollingHash(T, B);
int n = T.length();
ans += cnt[rht.query(0, n)];
}
cout << ans << endl;
return 0;
}