結果

問題 No.1005 BOT対策
ユーザー haruki_Kharuki_K
提出日時 2020-03-06 21:38:02
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 6,254 bytes
コンパイル時間 1,659 ms
コンパイル使用メモリ 174,024 KB
実行使用メモリ 5,248 KB
最終ジャッジ日時 2024-10-14 10:28:27
合計ジャッジ時間 2,698 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 2 ms
5,248 KB
testcase_01 AC 2 ms
5,248 KB
testcase_02 AC 2 ms
5,248 KB
testcase_03 AC 2 ms
5,248 KB
testcase_04 AC 2 ms
5,248 KB
testcase_05 AC 2 ms
5,248 KB
testcase_06 AC 2 ms
5,248 KB
testcase_07 AC 2 ms
5,248 KB
testcase_08 AC 2 ms
5,248 KB
testcase_09 AC 2 ms
5,248 KB
testcase_10 AC 2 ms
5,248 KB
testcase_11 AC 2 ms
5,248 KB
testcase_12 AC 2 ms
5,248 KB
testcase_13 AC 1 ms
5,248 KB
testcase_14 AC 2 ms
5,248 KB
testcase_15 AC 2 ms
5,248 KB
testcase_16 AC 2 ms
5,248 KB
testcase_17 AC 1 ms
5,248 KB
testcase_18 AC 2 ms
5,248 KB
testcase_19 AC 1 ms
5,248 KB
testcase_20 AC 1 ms
5,248 KB
testcase_21 AC 2 ms
5,248 KB
testcase_22 AC 2 ms
5,248 KB
testcase_23 AC 2 ms
5,248 KB
testcase_24 AC 2 ms
5,248 KB
testcase_25 AC 2 ms
5,248 KB
testcase_26 AC 2 ms
5,248 KB
testcase_27 AC 1 ms
5,248 KB
testcase_28 AC 2 ms
5,248 KB
testcase_29 AC 2 ms
5,248 KB
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 #

// >>> TEMPLATES
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using i32 = int32_t;
using i64 = int64_t;
#define int ll
#define double ld
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)
#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)
#define loop(i,a,B) for (int i = a; i B; i++)
#define loopR(i,a,B) for (int i = a; i B; i--)
#define all(x) (x).begin(), (x).end()
#define allR(x) (x).rbegin(), (x).rend()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second
auto constexpr INF32 = numeric_limits<int32_t>::max()/2-1;
auto constexpr INF64 = numeric_limits<int64_t>::max()/2-1;
auto constexpr INF   = numeric_limits<int>::max()/2-1;
#ifdef LOCAL
#include "debug.hpp"
#define dump(...) cerr << "[" << setw(3) << __LINE__ << ":" << __FUNCTION__ << "] ", dump_impl(#__VA_ARGS__, __VA_ARGS__)
#define say(x) cerr << "[" << __LINE__ << ":" << __FUNCTION__ << "] " << x << endl
#define debug if (1)
#else
#define dump(...) (void)(0)
#define say(x) (void)(0)
#define debug if (0)
#endif
template <class T> using pque_max = priority_queue<T>;
template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
template <class F> struct FixPoint : private F {
    constexpr FixPoint(F&& f) : F(forward<F>(f)) {}
    template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }
};
struct MakeFixPoint {
    template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }
};
#define MFP MakeFixPoint()|
#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)
template <class T, size_t d> struct vec_impl {
    using type = vector<typename vec_impl<T,d-1>::type>;
    template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }
};
template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;
template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
template <class T> constexpr bool chmin(T& x, T const& y) { if (x > y) { x = y; return true; } return false; }
template <class T> constexpr bool chmax(T& x, T const& y) { if (x < y) { x = y; return true; } return false; }
template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
template <class T> int sz(T const& x) { return x.size(); }
template <class C, class T> int lbd(C const& v, T const& x) {
    return lower_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class T> int ubd(C const& v, T const& x) {
    return upper_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class F> int ppt(C const& v, F f) {
    return partition_point(v.begin(), v.end(), f)-v.begin();
}
// <<<
// >>> rolling hash
template <class Str>
struct RollingHash {
    using u64 = uint64_t;
    using u32 = uint32_t;
    static constexpr u64 mod = (1ull<<61) - 1;
    static u64 base;
    static void init_base() {
        if (base) return;
        mt19937_64 mt(random_device{}());
        base = uniform_int_distribution<u64>(300,mod-300)(mt);
    }

    static constexpr u64 mul(u64 a, u64 b) {
        constexpr u64 mask30 = (1ull << 30) - 1;
        constexpr u64 mask31 = (1ull << 31) - 1;
        u64 au = a >> 31;
        u64 ad = a & mask31;
        u64 bu = b >> 31;
        u64 bd = b & mask31;
        u64 mid = ad * bu + au * bd;
        u64 midu = mid >> 30;
        u64 midd = mid & mask30;
        u64 val = au * bu * 2 + midu + (midd << 31) + ad * bd;
        return (val & mod) + (val >> 61);
    }
    static constexpr u64 take_mod(u64 val) {
        val = (val & mod) + (val >> 61);
        if (val >= mod) val -= mod;
        return val;
    }
    static constexpr u32 xorshift(u32 x) {
        x ^= x << 13; x ^= x >> 17; x ^= x << 5;
        return x;
    }

    Str s;
    vector<u64> hash;
    static vector<u64> pow;

    RollingHash(Str const& s = "") : s(s) {
        init_base();
        hash.resize(s.size()+1);
        rep (i,s.size()) {
            hash[i+1] = take_mod(mul(hash[i],base) + (xorshift(s[i]^u32(base))));
        }
        if (pow.size() < s.size()+1) {
            auto m = max(signed(pow.size())-1, 0);
            pow.resize(s.size()+1,1);
            for (int i = m; i+1 < (int)pow.size(); ++i) {
                pow[i+1] = take_mod(mul(pow[i],base));
            }
        }
    }
    u64 get() const { return hash.back(); }
    u64 get(int l, int r) const {
        return take_mod(3*mod - mul(hash[l],pow[r-l]) + hash[r]);
    }
};

template <class Str> uint64_t RollingHash<Str>::base;
template <class Str> vector<uint64_t> RollingHash<Str>::pow;
using ull = uint64_t;
// <<<

int32_t main() {
    string s,t; cin >> s >> t;
    int n = s.size(), m = t.size();

    if (m == 1) {
        if (count(all(s),t[0])) {
            quit(-1);
        } else {
            quit(0);
        }
    }

    RollingHash<string> s_rh(s), t_rh(t);

    int cnt = 0;
    for (int i = 0; i+m <= n; ) {
        if (s_rh.get(i,i+m) == t_rh.get()) {
            cnt++;
            i += m-1;
        } else {
            i++;
        }
    }

    cout << cnt << endl;


}
0