結果

問題 No.515 典型LCP
ユーザー Nguyen Thanh TrungNguyen Thanh Trung
提出日時 2022-06-26 18:43:45
言語 C++23
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 533 ms / 1,000 ms
コード長 8,378 bytes
コンパイル時間 3,362 ms
コンパイル使用メモリ 261,528 KB
実行使用メモリ 35,452 KB
最終ジャッジ日時 2024-11-17 05:58:37
合計ジャッジ時間 10,256 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge2
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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 514 ms
35,316 KB
testcase_01 AC 505 ms
35,452 KB
testcase_02 AC 464 ms
31,392 KB
testcase_03 AC 21 ms
18,816 KB
testcase_04 AC 20 ms
18,836 KB
testcase_05 AC 432 ms
31,680 KB
testcase_06 AC 448 ms
31,608 KB
testcase_07 AC 441 ms
31,576 KB
testcase_08 AC 437 ms
31,616 KB
testcase_09 AC 409 ms
31,432 KB
testcase_10 AC 176 ms
31,412 KB
testcase_11 AC 174 ms
31,488 KB
testcase_12 AC 172 ms
31,476 KB
testcase_13 AC 461 ms
31,764 KB
testcase_14 AC 37 ms
31,616 KB
testcase_15 AC 533 ms
31,744 KB
testcase_16 AC 533 ms
31,640 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 # 

#include "bits/stdc++.h"
// #pragma GCC optimize("Ofast,unroll-loops")
// #pragma GCC target("avx2,tune=native")
using namespace std;

#define int long long
#define FOR(i, a, b) for (int i = (a), _##i = (b); i <= _##i; ++i)
#define FORD(i, a, b) for (int i = (a), _##i = (b); i >= _##i; --i)
#define REP(i, a) for (int i = 0, _##i = (a); i < _##i; ++i)
 
#define DEBUG(X) { auto _X = (X); cerr << "L" << __LINE__ << ": " << #X << " = " << (_X) << endl; }
#define PR(A, n) { cerr << "L" << __LINE__ << ": " << #A << " = "; FOR(_, 1, n) cerr << A[_] << ' '; cerr << endl; }
#define PR0(A, n) { cerr << "L" << __LINE__ << ": " << #A << " = "; REP(_, n) cerr << A[_] << ' '; cerr << endl; }
 
#define __builtin_popcount __builtin_popcountll
#define SZ(x) ((int)(x).size())
#define ALL(a) (a).begin(), (a).end()
#define TWO(x) (1LL<<(x))
inline int gcd(int a, int b) {int r; while (b) {r = a % b; a = b; b = r;} return a;}

// For printing pair, container, etc.
// Copied from https://quangloc99.github.io/2021/07/30/my-CP-debugging-template.html
template<class U, class V> ostream& operator << (ostream& out, const pair<U, V>& p) {
    return out << '(' << p.first << ", " << p.second << ')';
}

template<class Con, class = decltype(begin(declval<Con>()))>
typename enable_if<!is_same<Con, string>::value, ostream&>::type
operator << (ostream& out, const Con& con) {
    out << '{';
    for (auto beg = con.begin(), it = beg; it != con.end(); it++) {
        out << (it == beg ? "" : ", ") << *it;
    }
    return out << '}';
}
template<size_t i, class T> ostream& print_tuple_utils(ostream& out, const T& tup) {
    if (i == tuple_size<T>::value) return out << ")"; 
    else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); 
}
template<class ...U> ostream& operator << (ostream& out, const tuple<U...>& t) {
    return print_tuple_utils<0, tuple<U...>>(out, t);
}

// for 64-bit, use mt19937_64
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int get_rand(int r) {
    return uniform_int_distribution<int> (0, r-1)(rng);
}

// use shuffle instead of random_shuffle
#define random_shuffle askcjaljc

inline void fasterLLDivMod(unsigned long long x, unsigned y, unsigned &out_d, unsigned &out_m) {
    unsigned xh = (unsigned)(x >> 32), xl = (unsigned)x, d, m;
#ifdef __GNUC__
    asm(
        "divl %4; \n\t"
        : "=a" (d), "=d" (m)
        : "d" (xh), "a" (xl), "r" (y)
    );
#else
    __asm {
        mov edx, dword ptr[xh];
        mov eax, dword ptr[xl];
        div dword ptr[y];
        mov dword ptr[d], eax;
        mov dword ptr[m], edx;
    };
#endif
    out_d = d; out_m = m;
}

template<int MOD>
struct ModInt {
    unsigned x;

    constexpr ModInt() : x(0) { }
    constexpr ModInt(signed long long sig) { int sigt = sig % MOD; if (sigt < 0) sigt += MOD; x = sigt; }

#define COMPAREOP(OP) bool constexpr operator OP(ModInt b) const { return x OP b.x; }
    COMPAREOP(==) COMPAREOP(!=) COMPAREOP(<) COMPAREOP(>) COMPAREOP(<=) COMPAREOP(>=)
#undef COMPAREOP

    ModInt operator-() const { return ModInt(x ? MOD - x : 0); }

    ModInt constexpr& operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; }
    ModInt constexpr& operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; }
    ModInt &operator*=(ModInt that) {
        unsigned dummy;
        fasterLLDivMod((unsigned long long)x * that.x, MOD, dummy, x);
        return *this;
    }
    ModInt operator*(ModInt that) const {
        ModInt res;
        unsigned dummy;
        fasterLLDivMod((unsigned long long)x * that.x, MOD, dummy, res.x);
        return res;
    }
    ModInt operator+(ModInt that) const { return ModInt(*this) += that; }
    ModInt operator-(ModInt that) const { return ModInt(*this) -= that; }

    // Below: copied from user202729_, not tested.
    ModInt inv() const {
        int a = x, b = MOD, ax = 1, bx = 0;
        while (b) {
            int q = a/b, t = a%b;
            a = b; b = t;
            t = ax - bx*q;
            ax = bx; bx = t;
        }
        assert(a == 1);
        if (ax < 0) ax += MOD;
        return ax;
    }
    ModInt& operator /= (ModInt m) { return (*this) *= m.inv(); }
    ModInt operator / (ModInt that) const { return ModInt(*this) /= that; }
};

template<int MOD>
ModInt<MOD> power(ModInt<MOD> n, long long k) {
    if (k == 0) return ModInt<MOD> (1);
    ModInt<MOD> res(1);
    while (k > 0) {
        if (k & 1) res = res * n;
        n = n * n;
        k >>= 1;
    }
    return res;
}

const int MOD = 1e9 + 7;
using modular = ModInt<MOD>;

std::ostream& operator << (std::ostream& cout, const modular& m) {
    cout << m.x;
    return cout;
}
std::istream& operator >> (std::istream& cin, modular& m) {
    cin >> m.x;
    return cin;
}

struct Hash {
    long long x;
    modular y;

    Hash operator + (const Hash& a) const { return Hash{x + a.x, y + a.y}; }
    Hash operator - (const Hash& a) const { return Hash{x - a.x, y - a.y}; }
    Hash operator * (const Hash& a) const { return Hash{x * a.x, y * a.y}; }
    Hash operator * (int k) const { return Hash{x*k, y*k}; }
};
bool operator == (const Hash& a, const Hash& b) {
    return a.x == b.x && a.y == b.y;
}

struct HashGenerator {
    HashGenerator(int maxLen, int base = 311) {
        p.resize(maxLen + 1);
        p[0] = {1, 1};
        for (int i = 1; i <= maxLen; i++) {
            p[i] = p[i-1] * base;
        }
    }

    std::vector<Hash> hash(const std::string& s) {
        std::vector<Hash> res(s.size());
        for (size_t i = 0; i < s.size(); i++) {
            res[i] = p[i] * (int) s[i];
        }
        std::partial_sum(res.begin(), res.end(), res.begin());
        return res;
    }

    // compare [l1, r1] vs [l2, r2]
    bool equals(
            const std::vector<Hash>& h1, int l1, int r1,
            const std::vector<Hash>& h2, int l2, int r2) {
        assert(0 <= l1 && l1 <= r1 && r1 < (int) h1.size());
        assert(0 <= l2 && l2 <= r2 && r2 < (int) h2.size());

        return __getHash(h1, l1, r1) * p[l2] == __getHash(h2, l2, r2) * p[l1];
    }

    // Returns length of max common prefix of h1[l1, r1] and h2[l2, r2]
    // length = 0 -> first character of 2 substrings are different.
    int maxCommonPrefix(
            const std::vector<Hash>& h1, int l1, int r1,
            const std::vector<Hash>& h2, int l2, int r2) {
        assert(0 <= l1 && l1 <= r1 && r1 < (int) h1.size());
        assert(0 <= l2 && l2 <= r2 && r2 < (int) h2.size());

        int len1 = r1 - l1 + 1;
        int len2 = r2 - l2 + 1;

        auto r = std::views::iota(0, std::min(len1, len2));
        auto res = std::ranges::partition_point(
                r,
                [&] (int mid) {
                    return equals(h1, l1, l1+mid, h2, l2, l2+mid);
                });
        return *res;
    }

    // compare s1[l1, r1] and s2[l2, r2]
    int cmp(
            const std::string& s1, const std::vector<Hash>& h1, int l1, int r1,
            const std::string& s2, const std::vector<Hash>& h2, int l2, int r2) {
        assert(0 <= l1 && l1 <= r1 && r1 < (int) h1.size());
        assert(0 <= l2 && l2 <= r2 && r2 < (int) h2.size());

        int commonPrefixLen = maxCommonPrefix(h1, l1, r1, h2, l2, r2);
        char c1 = (l1 + commonPrefixLen <= r1) ? s1[l1 + commonPrefixLen] : 0;
        char c2 = (l2 + commonPrefixLen <= r2) ? s2[l2 + commonPrefixLen] : 0;

        return (c1 == c2) ? 0 : ((c1 < c2) ? -1 : 1);
    }

private:
    std::vector<Hash> p;

    // DO NOT USE, this doesn't divide by p[l]
    Hash __getHash(const std::vector<Hash>& h, int l, int r) {
        assert(0 <= l && l <= r && r < (int) h.size());
        return h[r] - (l == 0 ? Hash{0, 0} : h[l-1]);
    }
};

HashGenerator g(1000111);

int32_t main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int n; std::cin >> n;

    std::vector<std::vector<Hash>> hs;
    for (int i = 0; i < n; i++) {
        std::string s; std::cin >> s;

        hs.push_back(g.hash(s));
    }

    int m;
    long long x, d, res = 0;
    std::cin >> m >> x >> d;

    while (m--) {
        int i = x / (n - 1);
        int j = x % (n - 1);
        if (i <= j) ++j;
        x = (x + d) % (n * (n-1LL));

        res += g.maxCommonPrefix(
                hs[i], 0, SZ(hs[i]) - 1,
                hs[j], 0, SZ(hs[j]) - 1);
    }
    std::cout << res << '\n';
    return 0;
}
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