제출 #501971

#제출 시각아이디문제언어결과실행 시간메모리
501971NyaanSateliti (COCI20_satellti)C++17
110 / 110
2422 ms88068 KiB
/** * date : 2022-01-05 10:51:45 */ #define NDEBUG using namespace std; // intrinstic #include <immintrin.h> #include <algorithm> #include <array> #include <bitset> #include <cassert> #include <cctype> #include <cfenv> #include <cfloat> #include <chrono> #include <cinttypes> #include <climits> #include <cmath> #include <complex> #include <cstdarg> #include <cstddef> #include <cstdint> #include <cstdio> #include <cstdlib> #include <cstring> #include <deque> #include <fstream> #include <functional> #include <initializer_list> #include <iomanip> #include <ios> #include <iostream> #include <istream> #include <iterator> #include <limits> #include <list> #include <map> #include <memory> #include <new> #include <numeric> #include <ostream> #include <queue> #include <random> #include <set> #include <sstream> #include <stack> #include <streambuf> #include <string> #include <tuple> #include <type_traits> #include <typeinfo> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> // utility namespace Nyaan { using ll = long long; using i64 = long long; using u64 = unsigned long long; using i128 = __int128_t; using u128 = __uint128_t; template <typename T> using V = vector<T>; template <typename T> using VV = vector<vector<T>>; using vi = vector<int>; using vl = vector<long long>; using vd = V<double>; using vs = V<string>; using vvi = vector<vector<int>>; using vvl = vector<vector<long long>>; template <typename T, typename U> struct P : pair<T, U> { template <typename... Args> P(Args... args) : pair<T, U>(args...) {} using pair<T, U>::first; using pair<T, U>::second; T &x() { return first; } const T &x() const { return first; } U &y() { return second; } const U &y() const { return second; } P &operator+=(const P &r) { first += r.first; second += r.second; return *this; } P &operator-=(const P &r) { first -= r.first; second -= r.second; return *this; } P &operator*=(const P &r) { first *= r.first; second *= r.second; return *this; } P operator+(const P &r) const { return P(*this) += r; } P operator-(const P &r) const { return P(*this) -= r; } P operator*(const P &r) const { return P(*this) *= r; } P operator*(int r) const { return {first * r, second * r}; } P operator-() const { return P{-first, -second}; } }; using pl = P<ll, ll>; using pi = P<int, int>; using vp = V<pl>; constexpr int inf = 1001001001; constexpr long long infLL = 4004004004004004004LL; template <typename T> int sz(const T &t) { return t.size(); } template <typename T, typename U> inline bool amin(T &x, U y) { return (y < x) ? (x = y, true) : false; } template <typename T, typename U> inline bool amax(T &x, U y) { return (x < y) ? (x = y, true) : false; } template <typename T> inline T Max(const vector<T> &v) { return *max_element(begin(v), end(v)); } template <typename T> inline T Min(const vector<T> &v) { return *min_element(begin(v), end(v)); } template <typename T> inline long long Sum(const vector<T> &v) { return accumulate(begin(v), end(v), 0LL); } template <typename T> int lb(const vector<T> &v, const T &a) { return lower_bound(begin(v), end(v), a) - begin(v); } template <typename T> int ub(const vector<T> &v, const T &a) { return upper_bound(begin(v), end(v), a) - begin(v); } constexpr long long TEN(int n) { long long ret = 1, x = 10; for (; n; x *= x, n >>= 1) ret *= (n & 1 ? x : 1); return ret; } template <typename T, typename U> pair<T, U> mkp(const T &t, const U &u) { return make_pair(t, u); } template <typename T> vector<T> mkrui(const vector<T> &v, bool rev = false) { vector<T> ret(v.size() + 1); if (rev) { for (int i = int(v.size()) - 1; i >= 0; i--) ret[i] = v[i] + ret[i + 1]; } else { for (int i = 0; i < int(v.size()); i++) ret[i + 1] = ret[i] + v[i]; } return ret; }; template <typename T> vector<T> mkuni(const vector<T> &v) { vector<T> ret(v); sort(ret.begin(), ret.end()); ret.erase(unique(ret.begin(), ret.end()), ret.end()); return ret; } template <typename F> vector<int> mkord(int N, F f) { vector<int> ord(N); iota(begin(ord), end(ord), 0); sort(begin(ord), end(ord), f); return ord; } template <typename T> vector<int> mkinv(vector<T> &v) { int max_val = *max_element(begin(v), end(v)); vector<int> inv(max_val + 1, -1); for (int i = 0; i < (int)v.size(); i++) inv[v[i]] = i; return inv; } } // namespace Nyaan // bit operation namespace Nyaan { __attribute__((target("popcnt"))) inline int popcnt(const u64 &a) { return _mm_popcnt_u64(a); } inline int lsb(const u64 &a) { return a ? __builtin_ctzll(a) : 64; } inline int ctz(const u64 &a) { return a ? __builtin_ctzll(a) : 64; } inline int msb(const u64 &a) { return a ? 63 - __builtin_clzll(a) : -1; } template <typename T> inline int gbit(const T &a, int i) { return (a >> i) & 1; } template <typename T> inline void sbit(T &a, int i, bool b) { if (gbit(a, i) != b) a ^= T(1) << i; } constexpr long long PW(int n) { return 1LL << n; } constexpr long long MSK(int n) { return (1LL << n) - 1; } } // namespace Nyaan // inout namespace Nyaan { template <typename T, typename U> ostream &operator<<(ostream &os, const pair<T, U> &p) { os << p.first << " " << p.second; return os; } template <typename T, typename U> istream &operator>>(istream &is, pair<T, U> &p) { is >> p.first >> p.second; return is; } template <typename T> ostream &operator<<(ostream &os, const vector<T> &v) { int s = (int)v.size(); for (int i = 0; i < s; i++) os << (i ? " " : "") << v[i]; return os; } template <typename T> istream &operator>>(istream &is, vector<T> &v) { for (auto &x : v) is >> x; return is; } ostream &operator<<(ostream &os, __int128_t x) { if (x == 0) return os << 0; if (x < 0) os << '-', x = -x; string S; while (x) S.push_back('0' + x % 10), x /= 10; reverse(begin(S), end(S)); return os << S; } ostream &operator<<(ostream &os, __uint128_t x) { if (x == 0) return os << 0; string S; while (x) S.push_back('0' + x % 10), x /= 10; reverse(begin(S), end(S)); return os << S; } void in() {} template <typename T, class... U> void in(T &t, U &...u) { cin >> t; in(u...); } void out() { cout << "\n"; } template <typename T, class... U, char sep = ' '> void out(const T &t, const U &...u) { cout << t; if (sizeof...(u)) cout << sep; out(u...); } void outr() {} template <typename T, class... U, char sep = ' '> void outr(const T &t, const U &...u) { cout << t; outr(u...); } struct IoSetupNya { IoSetupNya() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); cerr << fixed << setprecision(7); } } iosetupnya; } // namespace Nyaan // debug namespace DebugImpl { template <typename U, typename = void> struct is_specialize : false_type {}; template <typename U> struct is_specialize< U, typename conditional<false, typename U::iterator, void>::type> : true_type {}; template <typename U> struct is_specialize< U, typename conditional<false, decltype(U::first), void>::type> : true_type {}; template <typename U> struct is_specialize<U, enable_if_t<is_integral<U>::value, void>> : true_type { }; void dump(const char& t) { cerr << t; } void dump(const string& t) { cerr << t; } void dump(const bool& t) { cerr << (t ? "true" : "false"); } void dump(__int128_t t) { if (t == 0) cerr << 0; if (t < 0) cerr << '-', t = -t; string S; while (t) S.push_back('0' + t % 10), t /= 10; reverse(begin(S), end(S)); cerr << S; } void dump(__uint128_t t) { if (t == 0) cerr << 0; string S; while (t) S.push_back('0' + t % 10), t /= 10; reverse(begin(S), end(S)); cerr << S; } template <typename U, enable_if_t<!is_specialize<U>::value, nullptr_t> = nullptr> void dump(const U& t) { cerr << t; } template <typename T> void dump(const T& t, enable_if_t<is_integral<T>::value>* = nullptr) { string res; if (t == Nyaan::inf) res = "inf"; if constexpr (is_signed<T>::value) { if (t == -Nyaan::inf) res = "-inf"; } if constexpr (sizeof(T) == 8) { if (t == Nyaan::infLL) res = "inf"; if constexpr (is_signed<T>::value) { if (t == -Nyaan::infLL) res = "-inf"; } } if (res.empty()) res = to_string(t); cerr << res; } template <typename T, typename U> void dump(const pair<T, U>&); template <typename T> void dump(const pair<T*, int>&); template <typename T> void dump(const T& t, enable_if_t<!is_void<typename T::iterator>::value>* = nullptr) { cerr << "[ "; for (auto it = t.begin(); it != t.end();) { dump(*it); cerr << (++it == t.end() ? "" : ", "); } cerr << " ]"; } template <typename T, typename U> void dump(const pair<T, U>& t) { cerr << "( "; dump(t.first); cerr << ", "; dump(t.second); cerr << " )"; } template <typename T> void dump(const pair<T*, int>& t) { cerr << "[ "; for (int i = 0; i < t.second; i++) { dump(t.first[i]); cerr << (i == t.second - 1 ? "" : ", "); } cerr << " ]"; } void trace() { cerr << endl; } template <typename Head, typename... Tail> void trace(Head&& head, Tail&&... tail) { cerr << " "; dump(head); if (sizeof...(tail) != 0) cerr << ","; trace(forward<Tail>(tail)...); } } // namespace DebugImpl #ifdef NyaanDebug #define trc(...) \ do { \ cerr << "## " << #__VA_ARGS__ << " = "; \ DebugImpl::trace(__VA_ARGS__); \ } while (0) #else #define trc(...) (void(0)) #endif // macro #define each(x, v) for (auto&& x : v) #define each2(x, y, v) for (auto&& [x, y] : v) #define all(v) (v).begin(), (v).end() #define rep(i, N) for (long long i = 0; i < (long long)(N); i++) #define repr(i, N) for (long long i = (long long)(N)-1; i >= 0; i--) #define rep1(i, N) for (long long i = 1; i <= (long long)(N); i++) #define repr1(i, N) for (long long i = (N); (long long)(i) > 0; i--) #define reg(i, a, b) for (long long i = (a); i < (b); i++) #define regr(i, a, b) for (long long i = (b)-1; i >= (a); i--) #define fi first #define se second #define ini(...) \ int __VA_ARGS__; \ in(__VA_ARGS__) #define inl(...) \ long long __VA_ARGS__; \ in(__VA_ARGS__) #define ins(...) \ string __VA_ARGS__; \ in(__VA_ARGS__) #define in2(s, t) \ for (int i = 0; i < (int)s.size(); i++) { \ in(s[i], t[i]); \ } #define in3(s, t, u) \ for (int i = 0; i < (int)s.size(); i++) { \ in(s[i], t[i], u[i]); \ } #define in4(s, t, u, v) \ for (int i = 0; i < (int)s.size(); i++) { \ in(s[i], t[i], u[i], v[i]); \ } #define die(...) \ do { \ Nyaan::out(__VA_ARGS__); \ return; \ } while (0) namespace Nyaan { void solve(); } int main() { Nyaan::solve(); } // namespace inner { using i64 = long long; using u64 = unsigned long long; using u128 = __uint128_t; template <int BASE_NUM = 2> struct Hash : array<u64, BASE_NUM> { using array<u64, BASE_NUM>::operator[]; static constexpr int n = BASE_NUM; Hash() : array<u64, BASE_NUM>() {} static constexpr u64 md = (1ull << 61) - 1; constexpr static Hash set(const i64 &a) { Hash res; fill(begin(res), end(res), cast(a)); return res; } Hash &operator+=(const Hash &r) { for (int i = 0; i < n; i++) if (((*this)[i] += r[i]) >= md) (*this)[i] -= md; return *this; } Hash &operator+=(const i64 &r) { u64 s = cast(r); for (int i = 0; i < n; i++) if (((*this)[i] += s) >= md) (*this)[i] -= md; return *this; } Hash &operator-=(const Hash &r) { for (int i = 0; i < n; i++) if (((*this)[i] += md - r[i]) >= md) (*this)[i] -= md; return *this; } Hash &operator-=(const i64 &r) { u64 s = cast(r); for (int i = 0; i < n; i++) if (((*this)[i] += md - s) >= md) (*this)[i] -= md; return *this; } Hash &operator*=(const Hash &r) { for (int i = 0; i < n; i++) (*this)[i] = modmul((*this)[i], r[i]); return *this; } Hash &operator*=(const i64 &r) { u64 s = cast(r); for (int i = 0; i < n; i++) (*this)[i] = modmul((*this)[i], s); return *this; } Hash operator+(const Hash &r) { return Hash(*this) += r; } Hash operator+(const i64 &r) { return Hash(*this) += r; } Hash operator-(const Hash &r) { return Hash(*this) -= r; } Hash operator-(const i64 &r) { return Hash(*this) -= r; } Hash operator*(const Hash &r) { return Hash(*this) *= r; } Hash operator*(const i64 &r) { return Hash(*this) *= r; } Hash operator-() const { Hash res; for (int i = 0; i < n; i++) res[i] = (*this)[i] == 0 ? 0 : md - (*this)[i]; return res; } friend Hash pfma(const Hash &a, const Hash &b, const Hash &c) { Hash res; for (int i = 0; i < n; i++) res[i] = modfma(a[i], b[i], c[i]); return res; } friend Hash pfma(const Hash &a, const Hash &b, const i64 &c) { Hash res; u64 s = cast(c); for (int i = 0; i < n; i++) res[i] = modfma(a[i], b[i], s); return res; } static Hash get_basis() { static auto rand_time = chrono::duration_cast<chrono::nanoseconds>( chrono::high_resolution_clock::now().time_since_epoch()) .count(); static mt19937_64 rng(rand_time); Hash h; for (int i = 0; i < n; i++) { while (isPrimitive(h[i] = rng() % (md - 1) + 1) == false) ; } return h; } private: static u64 modpow(u64 a, u64 b) { u64 r = 1; for (a %= md; b; a = modmul(a, a), b >>= 1) r = modmul(r, a); return r; } static bool isPrimitive(u64 x) { for (auto &d : vector<u64>{2, 3, 5, 7, 11, 13, 31, 41, 61, 151, 331, 1321}) if (modpow(x, (md - 1) / d) <= 1) return false; return true; } static inline constexpr u64 cast(const long long &a) { return a < 0 ? a + md : a; } static inline constexpr u64 modmul(const u64 &a, const u64 &b) { u128 ret = u128(a) * b; ret = (ret & md) + (ret >> 61); return ret >= md ? ret - md : ret; } static inline constexpr u64 modfma(const u64 &a, const u64 &b, const u64 &c) { u128 ret = u128(a) * b + c; ret = (ret & md) + (ret >> 61); return ret >= md ? ret - md : ret; } }; } // namespace inner /** * @brief ハッシュ構造体 * @docs docs/inner/inner-hash.md */ template <typename Str, int BASE_NUM = 2> struct RollingHash2D { using Hash = inner::Hash<BASE_NUM>; using u64 = unsigned long long; vector<Str> data; vector<vector<Hash>> hs; vector<Hash> pw[2]; int h, w; static Hash basis[2]; RollingHash2D(const vector<Str> &S = vector<Str>()) { build(S); } void build(const vector<Str> &S) { data = S; h = S.size(); w = S[0].size(); pw[0].resize(h + 1); pw[1].resize(w + 1); pw[0][0] = pw[1][0] = Hash::set(1); for (int i = 1; i <= h; i++) pw[0][i] = pw[0][i - 1] * basis[0]; for (int i = 1; i <= w; i++) pw[1][i] = pw[1][i - 1] * basis[1]; hs.resize(h + 1, vector<Hash>(w + 1)); hs[0][0] = Hash::set(0); for (int i = 1; i <= h; i++) { hs[i][0] = Hash::set(0); for (int j = 1; j <= w; j++) hs[i][j] = pfma(hs[i][j - 1], basis[1], S[i - 1][j - 1]); } for (int j = 1; j <= w; j++) { hs[0][j] = Hash::set(0); for (int i = 1; i <= h; i++) hs[i][j] = pfma(hs[i - 1][j], basis[0], hs[i][j]); } } Hash get(int u, int l, int d, int r) { return hs[d][r] - hs[u][r] * pw[0][d - u] - hs[d][l] * pw[1][r - l] + hs[u][l] * pw[0][d - u] * pw[1][r - l]; } static Hash get_hash(const vector<Str> &T) { Hash ret = Hash::set(0); for (int i = 0; i < (int)T.size(); i++) { Hash h = Hash::set(0); for (int j = 0; j < (int)T[0].size(); j++) h = pfma(h, basis[1], T[i][j]); ret = pfma(ret, basis[0], h); } return ret; } }; template <typename Str, int BASE_NUM> typename RollingHash2D<Str, BASE_NUM>::Hash RollingHash2D<Str, BASE_NUM>::basis[2] = { inner::Hash<BASE_NUM>::get_basis(), inner::Hash<BASE_NUM>::get_basis()}; using roriha2d = RollingHash2D<string, 1>; /** * @brief 二次元Rolling Hash * @docs docs/string/rolling-hash-2d.md */ using namespace Nyaan; void Nyaan::solve() { inl(N, M); V<string> S(N); in(S); each(s, S) s += s; rep(i, N) S.push_back(S[i]); RollingHash2D rori(S); trc(S); vp kouho; rep(i, N) rep(j, M) kouho.emplace_back(i, j); pl ans{0, 0}; rep(i, N) rep(j, M) { trc(i, j, rori.get(i, j, i + 1, j + 1)); } each(p, kouho) { auto [ai, aj] = ans; auto [pi, pj] = p; // LCA int h; { int ok = 0, ng = N + 1; while (ok + 1 < ng) { int me = (ok + ng) / 2; auto ha = rori.get(ai, aj, ai + me, aj + M); auto hb = rori.get(pi, pj, pi + me, pj + M); (ha == hb ? ok : ng) = me; } h = ok; } if (h == N) continue; int w; { int ok = 0, ng = M + 1; while (ok + 1 < ng) { int me = (ok + ng) / 2; auto ha = rori.get(ai, aj, ai + h + 1, aj + me); auto hb = rori.get(pi, pj, pi + h + 1, pj + me); (ha == hb ? ok : ng) = me; } w = ok; } assert(w != M); if (S[ai + h][aj + w] == '.') ans = p; } auto [ai, aj] = ans; rep(i, N) { rep(j, M) { cout << S[i + ai][j + aj]; } cout << "\n"; } }
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