#define PROBLEM "https://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=1377" // #include "../../template/template.hpp" // #include "../../game/partisan-game.hpp" // #include "../../hashmap/hashmap-unerasable.hpp" using namespace Nyaan; void q() { auto f = [&](const string& S) { V<string> a, b; rep(i, sz(S)) { string T = S.substr(0, i); (S[i] == 'B' ? a : b).push_back(T); } return make_pair(a, b); }; PartisanGameSolver<string, decltype(f)> game(f); auto gen = [&](V<string> v) { int M = sz(v); V<SurrealNumber> w(M); rep(i, M) w[i] = game.get(v[i]); V<pair<SurrealNumber, int>> r(PW(M)); rep1(b, PW(M) - 1) { int t = msb(b); r[b] = r[b - PW(t)]; r[b].first += w[t]; r[b].second += sz(v[t]); } return r; }; ini(N); V<string> P(N); in(P); int M = N / 2; auto v = gen({begin(P), begin(P) + M}); auto w = gen({begin(P) + M, end(P)}); ll ans = 0; UnerasableHashMap<pl, int> mp; each(p, v) amax(mp[{p.first.p, p.first.q}], p.second); each(p, w) { pl key{-p.first.p, p.first.q}; if (mp.count(key)) amax(ans, p.second + mp[key]); } out(ans); } void Nyaan::solve() { int t = 1; // in(t); while (t--) q(); }
#line 1 "verify/verify-aoj-other/aoj-1377.test.cpp" #define PROBLEM "https://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=1377" // #line 2 "template/template.hpp" 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 #line 1 "template/util.hpp" 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> using minpq = priority_queue<T, vector<T>, greater<T>>; 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; 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; } template <typename S> P &operator*=(const S &r) { first *= r, second *= r; 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; } template <typename S> P operator*(const S &r) const { return P(*this) *= 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; } vector<int> mkiota(int n) { vector<int> ret(n); iota(begin(ret), end(ret), 0); return ret; } template <typename T> T mkrev(const T &v) { T w{v}; reverse(begin(w), end(w)); return w; } template <typename T> bool nxp(vector<T> &v) { return next_permutation(begin(v), end(v)); } // 返り値の型は入力の T に依存 // i 要素目 : [0, a[i]) template <typename T> vector<vector<T>> product(const vector<T> &a) { vector<vector<T>> ret; vector<T> v; auto dfs = [&](auto rc, int i) -> void { if (i == (int)a.size()) { ret.push_back(v); return; } for (int j = 0; j < a[i]; j++) v.push_back(j), rc(rc, i + 1), v.pop_back(); }; dfs(dfs, 0); return ret; } // F : function(void(T&)), mod を取る操作 // T : 整数型のときはオーバーフローに注意する template <typename T> T Power(T a, long long n, const T &I, const function<void(T &)> &f) { T res = I; for (; n; f(a = a * a), n >>= 1) { if (n & 1) f(res = res * a); } return res; } // T : 整数型のときはオーバーフローに注意する template <typename T> T Power(T a, long long n, const T &I) { return Power(a, n, I, function<void(T &)>{[](T &) -> void {}}); } } // namespace Nyaan #line 58 "template/template.hpp" // bit operation #line 1 "template/bitop.hpp" 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 #line 61 "template/template.hpp" // inout #line 1 "template/inout.hpp" 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; } istream &operator>>(istream &is, __int128_t &x) { string S; is >> S; x = 0; int flag = 0; for (auto &c : S) { if (c == '-') { flag = true; continue; } x *= 10; x += c - '0'; } if (flag) x = -x; return is; } istream &operator>>(istream &is, __uint128_t &x) { string S; is >> S; x = 0; for (auto &c : S) { x *= 10; x += c - '0'; } 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...); } struct IoSetupNya { IoSetupNya() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); cerr << fixed << setprecision(7); } } iosetupnya; } // namespace Nyaan #line 64 "template/template.hpp" // debug #line 1 "template/debug.hpp" 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 #ifdef NyaanLocal #define trc2(...) \ do { \ cerr << "## " << #__VA_ARGS__ << " = "; \ DebugImpl::trace(__VA_ARGS__); \ } while (0) #else #define trc2(...) (void(0)) #endif #line 67 "template/template.hpp" // macro #line 1 "template/macro.hpp" #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) #line 70 "template/template.hpp" namespace Nyaan { void solve(); } int main() { Nyaan::solve(); } #line 4 "verify/verify-aoj-other/aoj-1377.test.cpp" // #line 2 "game/partisan-game.hpp" #line 5 "game/partisan-game.hpp" using namespace std; #line 2 "game/surreal-number.hpp" #line 6 "game/surreal-number.hpp" using namespace std; // reference : http://www.ivis.co.jp/text/20111102.pdf struct SurrealNumber { using S = SurrealNumber; using i64 = long long; // p / 2^q の形で保持 i64 p, q; SurrealNumber(i64 _p = 0, i64 _q = 0) : p(_p), q(_q) {} friend ostream& operator<<(ostream& os, const SurrealNumber& r) { os << r.p; if (r.q != 0) os << " / " << (i64{1} << r.q); return os; } static S normalize(S s) { if (s.p != 0) { while (s.p % 2 == 0 and s.q != 0) s.p /= 2, s.q--; } else { s.q = 0; } return {s.p, s.q}; } // 加算・減算 friend S operator+(const S& l, const S& r) { i64 cq = max(l.q, r.q); i64 cp = (l.p << (cq - l.q)) + (r.p << (cq - r.q)); return normalize(S{cp, cq}); } friend S operator-(const S& l, const S& r) { i64 cq = max(l.q, r.q); i64 cp = (l.p << (cq - l.q)) - (r.p << (cq - r.q)); return normalize(S{cp, cq}); } S& operator+=(const S& r) { return (*this) = (*this) + r; } S& operator-=(const S& r) { return (*this) = (*this) - r; } S operator-() const { return {-p, q}; } S operator+() const { return {p, q}; } // 大小関係 friend bool operator<(const S& l, const S& r) { return (r - l).p > 0; } friend bool operator<=(const S& l, const S& r) { return (r - l).p >= 0; } friend bool operator>(const S& l, const S& r) { return (l - r).p > 0; } friend bool operator>=(const S& l, const S& r) { return (l - r).p >= 0; } friend bool operator==(const S& l, const S& r) { return (l - r).p == 0; } friend bool operator!=(const S& l, const S& r) { return (l - r).p != 0; } // 左右の子を返す関数 pair<S, S> child() const { if (p == 0) return {-1, 1}; if (q == 0 and p > 0) return {S{p * 2 - 1, 1}, p + 1}; if (q == 0 and p < 0) return {p - 1, S{p * 2 + 1, 1}}; return {(*this) - S{1, q + 1}, (*this) + S{1, q + 1}}; } S larger() const { S root = 0; while ((*this) >= root) root = root.child().second; return root; } S smaller() const { S root = 0; while ((*this) <= root) root = root.child().first; return root; } friend S reduce(const S& l, const S& r) { assert(l < r); S root = 0; while (l >= root or root >= r) { auto [lr, rr] = root.child(); root = (r <= root ? lr : rr); } return root; } }; /** * @brief 超現実数 */ #line 8 "game/partisan-game.hpp" // F : pair(vector<Game>, vector<Game>) を返す関数 template <typename Game, typename F> struct PartisanGameSolver { using Games = vector<Game>; using S = SurrealNumber; map<Game, S> mp; F f; PartisanGameSolver(const F& _f) : f(_f) {} S zero() const { return S{0}; } S get(Game g) { if (mp.count(g)) return mp[g]; return mp[g] = _get(g); } private: S _get(Game g) { Games gl, gr; tie(gl, gr) = f(g); if (gl.empty() and gr.empty()) return 0; vector<S> l, r; for (auto& cg : gl) l.push_back(get(cg)); for (auto& cg : gr) r.push_back(get(cg)); S sl, sr; if (!l.empty()) sl = *max_element(begin(l), end(l)); if (!r.empty()) sr = *min_element(begin(r), end(r)); if (r.empty()) return sl.larger(); if (l.empty()) return sr.smaller(); assert(sl < sr); return reduce(sl, sr); } }; /** * @brief 非不偏ゲーム */ #line 6 "verify/verify-aoj-other/aoj-1377.test.cpp" // #line 2 "hashmap/hashmap-unerasable.hpp" #line 7 "hashmap/hashmap-unerasable.hpp" using namespace std; #line 2 "internal/internal-hash-function.hpp" #line 4 "internal/internal-hash-function.hpp" using namespace std; #line 2 "internal/internal-seed.hpp" #line 4 "internal/internal-seed.hpp" using namespace std; namespace internal { unsigned long long non_deterministic_seed() { unsigned long long m = chrono::duration_cast<chrono::nanoseconds>( chrono::high_resolution_clock::now().time_since_epoch()) .count(); m ^= 9845834732710364265uLL; m ^= m << 24, m ^= m >> 31, m ^= m << 35; return m; } unsigned long long deterministic_seed() { return 88172645463325252UL; } // 64 bit の seed 値を生成 (手元では seed 固定) // 連続で呼び出すと同じ値が何度も返ってくるので注意 // #define RANDOMIZED_SEED するとシードがランダムになる unsigned long long seed() { #if defined(NyaanLocal) && !defined(RANDOMIZED_SEED) return deterministic_seed(); #else return non_deterministic_seed(); #endif } } // namespace internal #line 2 "internal/internal-type-traits.hpp" #line 4 "internal/internal-type-traits.hpp" using namespace std; namespace internal { template <typename T> using is_broadly_integral = typename conditional_t<is_integral_v<T> || is_same_v<T, __int128_t> || is_same_v<T, __uint128_t>, true_type, false_type>::type; template <typename T> using is_broadly_signed = typename conditional_t<is_signed_v<T> || is_same_v<T, __int128_t>, true_type, false_type>::type; template <typename T> using is_broadly_unsigned = typename conditional_t<is_unsigned_v<T> || is_same_v<T, __uint128_t>, true_type, false_type>::type; #define ENABLE_VALUE(x) \ template <typename T> \ constexpr bool x##_v = x<T>::value; ENABLE_VALUE(is_broadly_integral); ENABLE_VALUE(is_broadly_signed); ENABLE_VALUE(is_broadly_unsigned); #undef ENABLE_VALUE #define ENABLE_HAS_TYPE(var) \ template <class, class = void> \ struct has_##var : false_type {}; \ template <class T> \ struct has_##var<T, void_t<typename T::var>> : true_type {}; \ template <class T> \ constexpr auto has_##var##_v = has_##var<T>::value; #define ENABLE_HAS_VAR(var) \ template <class, class = void> \ struct has_##var : false_type {}; \ template <class T> \ struct has_##var<T, void_t<decltype(T::var)>> : true_type {}; \ template <class T> \ constexpr auto has_##var##_v = has_##var<T>::value; } // namespace internal #line 8 "internal/internal-hash-function.hpp" namespace internal { // 整数, 整数列を 64 bit unsigned int へ移す using u64 = unsigned long long; using u128 = __uint128_t; ENABLE_HAS_TYPE(first_type); ENABLE_HAS_TYPE(second_type); ENABLE_HAS_TYPE(iterator); template <typename T> u64 hash_function(const T& x) { static u64 r = seed(); constexpr u64 z1 = 11995408973635179863ULL; if constexpr (is_broadly_integral_v<T>) { // Integral return (u64(x) ^ r) * z1; } else if constexpr (has_first_type_v<T> && has_second_type_v<T>) { // pair constexpr u64 z2 = 10150724397891781847ULL; return hash_function(x.first) + hash_function(x.second) * z2; } else if constexpr (has_iterator_v<T>) { // Container constexpr u64 mod = (1LL << 61) - 1; constexpr u64 base = 950699498548472943ULL; u64 m = 0; for (auto& z : x) { u64 w; if constexpr (is_broadly_integral_v<T>) { w = u64(z) ^ r; } else { w = hash_function(z); } u128 y = u128(m) * base + (w & mod); m = (y & mod) + (y >> 61); if (m >= mod) m -= mod; } m ^= m << 24, m ^= m >> 31, m ^= m << 35; return m; } else { static_assert([]() { return false; }()); } } template <typename Key> struct HashObject { size_t operator()(const Key& x) const { return hash_function(x); } }; } // namespace internal /* @brief ハッシュ関数 */ #line 10 "hashmap/hashmap-unerasable.hpp" // 削除不可能な hashmap // // テンプレート引数 // fixed_size : これを true にするするとバケットサイズが固定になる // get_hash : ハッシュ関数の指定 // 引数 // _default_value : val の初期値, この値で初期化 // _default_size : // バケットサイズ, max(4, _default_size) 以上の 2 べきで初期化 // ただし fixed_size が true の時にしかサイズを変更できない template <typename Key, typename Val, bool fixed_size = false, unsigned long long (*get_hash)(const Key&) = internal::hash_function<Key>> struct UnerasableHashMap { int N, occupied_num, shift; vector<Key> keys; vector<Val> vals; vector<char> flag; Val default_value; int default_size; // サイズを n に変更する void init(int n, bool reset = false) { assert(n >= 4 && (n & (n - 1)) == 0); if constexpr (fixed_size) { assert(reset == true); n = N; } if (reset == true) { N = n, occupied_num = 0, shift = 64 - __builtin_ctz(n); keys.resize(n); vals.resize(n); flag.resize(n); fill(begin(vals), end(vals), default_value); fill(begin(flag), end(flag), 0); } else { N = n, shift = 64 - __builtin_ctz(n); vector<Key> keys2(n); vector<Val> vals2(n, default_value); vector<char> flag2(n); swap(keys, keys2), swap(vals, vals2), swap(flag, flag2); for (int i = 0; i < (int)flag2.size(); i++) { if (flag2[i]) { int j = hint(keys2[i]); keys[j] = keys2[i], vals[j] = vals2[i], flag[j] = 1; } } } } UnerasableHashMap(const Val& _default_value = Val{}, int _default_size = 4) : occupied_num(0), default_value(_default_value) { if (fixed_size == false) _default_size = 4; N = 4; while (N < _default_size) N *= 2; default_size = N; init(N, true); } int hint(const Key& k) { int hash = get_hash(k) >> shift; while (flag[hash] && keys[hash] != k) hash = (hash + 1) & (N - 1); return hash; } // key が i である要素への参照を返す Val& operator[](const Key& k) { int i = hint(k); if (!flag[i]) { if constexpr (fixed_size == false) { if (occupied_num * 2 >= N) { init(2 * N), i = hint(k); } } keys[i] = k, flag[i] = 1, occupied_num++; } return vals[i]; } Val get(const Key& k) { int i = hint(k); return flag[i] ? vals[i] : default_value; } // 走査, f に関数 f(key, val) を入れる template <typename F> void enumerate(const F f) { for (int i = 0; i < (int)flag.size(); i++) { if (flag[i]) f(keys[i], vals[i]); } } int count(const Key& k) { return flag[hint(k)]; } bool contain(const Key& k) { return flag[hint(k)]; } int size() const { return occupied_num; } void reset() { init(default_size, true); } void clear() { init(default_size, true); } }; #line 8 "verify/verify-aoj-other/aoj-1377.test.cpp" using namespace Nyaan; void q() { auto f = [&](const string& S) { V<string> a, b; rep(i, sz(S)) { string T = S.substr(0, i); (S[i] == 'B' ? a : b).push_back(T); } return make_pair(a, b); }; PartisanGameSolver<string, decltype(f)> game(f); auto gen = [&](V<string> v) { int M = sz(v); V<SurrealNumber> w(M); rep(i, M) w[i] = game.get(v[i]); V<pair<SurrealNumber, int>> r(PW(M)); rep1(b, PW(M) - 1) { int t = msb(b); r[b] = r[b - PW(t)]; r[b].first += w[t]; r[b].second += sz(v[t]); } return r; }; ini(N); V<string> P(N); in(P); int M = N / 2; auto v = gen({begin(P), begin(P) + M}); auto w = gen({begin(P) + M, end(P)}); ll ans = 0; UnerasableHashMap<pl, int> mp; each(p, v) amax(mp[{p.first.p, p.first.q}], p.second); each(p, w) { pl key{-p.first.p, p.first.q}; if (mp.count(key)) amax(ans, p.second + mp[key]); } out(ans); } void Nyaan::solve() { int t = 1; // in(t); while (t--) q(); }