結果
問題 | No.599 回文かい |
ユーザー | Coki628 |
提出日時 | 2021-01-21 12:52:11 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 108 ms / 4,000 ms |
コード長 | 8,636 bytes |
コンパイル時間 | 2,431 ms |
コンパイル使用メモリ | 212,072 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-06 18:58:13 |
合計ジャッジ時間 | 3,666 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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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
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 44 ms
5,376 KB |
testcase_11 | AC | 27 ms
5,376 KB |
testcase_12 | AC | 51 ms
5,376 KB |
testcase_13 | AC | 30 ms
5,376 KB |
testcase_14 | AC | 75 ms
5,376 KB |
testcase_15 | AC | 87 ms
5,376 KB |
testcase_16 | AC | 100 ms
5,376 KB |
testcase_17 | AC | 108 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 2 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
evil_0.txt | AC | 61 ms
5,376 KB |
ソースコード
// #pragma GCC target("avx2") // #pragma GCC optimize("O3") // #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> using namespace std; using ll = long long; using ld = long double; using pll = pair<ll, ll>; using pii = pair<int, int>; using vvl = vector<vector<ll>>; using vvi = vector<vector<int>>; using vvpll = vector<vector<pll>>; #define rep(i, a, b) for (ll i=(a); i<(b); i++) #define rrep(i, a, b) for (ll i=(a); i>(b); i--) #define pb push_back #define tostr to_string #define ALL(A) A.begin(), A.end() #define elif else if // constexpr ll INF = LONG_LONG_MAX; constexpr ll INF = 1e18; constexpr ll MOD = 1000000007; const string digits = "0123456789"; const string ascii_lowercase = "abcdefghijklmnopqrstuvwxyz"; const string ascii_uppercase = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; const string ascii_letters = ascii_lowercase + ascii_uppercase; template<typename T> vector<vector<T>> list2d(int N, int M, T init) { return vector<vector<T>>(N, vector<T>(M, init)); } template<typename T> vector<vector<vector<T>>> list3d(int N, int M, int L, T init) { return vector<vector<vector<T>>>(N, vector<vector<T>>(M, vector<T>(L, init))); } template<typename T> vector<vector<vector<vector<T>>>> list4d(int N, int M, int L, int O, T init) { return vector<vector<vector<vector<T>>>>(N, vector<vector<vector<T>>>(M, vector<vector<T>>(L, vector<T>(O, init)))); } vector<ll> LIST(ll N) { vector<ll> A(N); rep(i, 0, N) cin >> A[i]; return A; } void print(ld out) { cout << fixed << setprecision(15) << out << '\n'; } void print(double out) { cout << fixed << setprecision(15) << out << '\n'; } template<typename T> void print(T out) { cout << out << '\n'; } template<typename T1, typename T2> void print(pair<T1, T2> out) { cout << out.first << ' ' << out.second << '\n'; } template<typename T> void print(vector<T> A) { rep(i, 0, A.size()) { cout << A[i]; cout << (i == A.size()-1 ? '\n' : ' '); } } template<typename T> void print(set<T> S) { vector<T> A(S.begin(), S.end()); print(A); } void Yes() { print("Yes"); } void No() { print("No"); } void YES() { print("YES"); } void NO() { print("NO"); } ll floor(ll a, ll b) { if (a < 0) { return (a-b+1) / b; } else { return a / b; } } ll ceil(ll a, ll b) { if (a >= 0) { return (a+b-1) / b; } else { return a / b; } } pll divmod(ll a, ll b) { ll d = a / b; ll m = a % b; return {d, m}; } template<typename T> bool chmax(T &x, T y) { return (y > x) ? x = y, true : false; } template<typename T> bool chmin(T &x, T y) { return (y < x) ? x = y, true : false; } template<typename T> T sum(vector<T> A) { T res = 0; for (T a: A) res += a; return res; } template<typename T> T max(vector<T> A) { return *max_element(ALL(A)); } template<typename T> T min(vector<T> A) { return *min_element(ALL(A)); } ll toint(string s) { ll res = 0; for (char c : s) { res *= 10; res += (c - '0'); } return res; } int toint(char num) { return num - '0'; } char tochar(int num) { return '0' + num; } int ord(char c) { return (int)c; } char chr(int a) { return (char)a; } ll pow(ll x, ll n) { ll res = 1; rep(_, 0, n) res *= x; return res; } ll pow(ll x, ll n, int mod) { ll res = 1; while (n > 0) { if (n & 1) { res = (res * x) % mod; } x = (x * x) % mod; n >>= 1; } return res; } int popcount(ll S) { return __builtin_popcountll(S); } ll gcd(ll a, ll b) { return __gcd(a, b); } ll lcm(ll x, ll y) { return (x * y) / gcd(x, y); } template<typename T> int bisect_left(vector<T> &A, T val) { return lower_bound(ALL(A), val) - A.begin(); } template<typename T> int bisect_right(vector<T> &A, T val) { return upper_bound(ALL(A), val) - A.begin(); } template<int mod> struct ModInt { int x; ModInt() : x(0) {} ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {} ModInt &operator+=(const ModInt &p) { if((x += p.x) >= mod) x -= mod; return *this; } ModInt &operator-=(const ModInt &p) { if((x += mod - p.x) >= mod) x -= mod; return *this; } ModInt &operator*=(const ModInt &p) { x = (int) (1LL * x * p.x % mod); return *this; } ModInt &operator/=(const ModInt &p) { *this *= p.inverse(); return *this; } ModInt operator-() const { return ModInt(-x); } ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; } ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; } ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; } ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; } bool operator==(const ModInt &p) const { return x == p.x; } bool operator!=(const ModInt &p) const { return x != p.x; } ModInt inverse() const { int a = x, b = mod, u = 1, v = 0, t; while(b > 0) { t = a / b; swap(a -= t * b, b); swap(u -= t * v, v); } return ModInt(u); } ModInt pow(int64_t n) const { ModInt ret(1), mul(x); while(n > 0) { if(n & 1) ret *= mul; mul *= mul; n >>= 1; } return ret; } friend ostream &operator<<(ostream &os, const ModInt &p) { return os << p.x; } friend istream &operator>>(istream &is, ModInt &a) { int64_t t; is >> t; a = ModInt< mod >(t); return (is); } static int get_mod() { return mod; } }; using mint = ModInt<MOD>; struct RollingHash { static const uint64_t mod = (1ull << 61ull) - 1; using uint128_t = __uint128_t; vector< uint64_t > 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) { uint128_t c = (uint128_t) a * b; return add(c >> 61, c & mod); } // 2^61-1以下の乱数を返す。これをbaseとするとHackされにくい 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); } inline void expand(size_t sz) { if(power.size() < sz + 1) { int pre_sz = (int) power.size(); power.resize(sz + 1); for(int i = pre_sz - 1; i < sz; i++) { power[i + 1] = mul(power[i], base); } } } // 基数baseのローリングハッシュを構築する explicit RollingHash(uint64_t base = generate_base()) : base(base), power{1} {} // 文字列sのハッシュテーブルを返す:O(n) vector< uint64_t > build(const string &s) const { int sz = s.size(); vector< uint64_t > hashed(sz + 1); for(int i = 0; i < sz; i++) { hashed[i + 1] = add(mul(hashed[i], base), s[i]); } return hashed; } template< typename T > vector< uint64_t > build(const vector< T > &s) const { int sz = s.size(); vector< uint64_t > hashed(sz + 1); for(int i = 0; i < sz; i++) { hashed[i + 1] = add(mul(hashed[i], base), s[i]); } return hashed; } // sの区間[l,r)のハッシュ値を返す:O(1) uint64_t query(const vector< uint64_t > &s, int l, int r) { expand(r - l); return add(s[r], mod - mul(s[l], power[r - l])); } // ハッシュ値h1と長さh2lenのハッシュ値h2を結合する uint64_t combine(uint64_t h1, uint64_t h2, size_t h2len) { expand(h2len); return add(mul(h1, power[h2len]), h2); } // ハッシュテーブルaの区間[l1,r1)と、ハッシュテーブルbの区間[l2,r2)の文字列の最長共通接頭辞の長さを返す:O(logn) int lcp(const vector< uint64_t > &a, int l1, int r1, const vector< uint64_t > &b, int l2, int r2) { int len = min(r1 - l1, r2 - l2); int low = 0, high = len + 1; while(high - low > 1) { int mid = (low + high) / 2; if(query(a, l1, l1 + mid) == query(b, l2, l2 + mid)) low = mid; else high = mid; } return low; } }; int main() { cin.tie(0); ios::sync_with_stdio(false); string S; cin >> S; ll N = S.size(); RollingHash rh; auto s_table = rh.build(S); vector<mint> dp(N+1); dp[0] = 1; rep(r, 1, N/2+1) { rep(l, 0, r) { if (rh.query(s_table, l, r) == rh.query(s_table, N-r, N-l)) { dp[r] += dp[l]; } } } mint ans = 0; rep(i, 0, N/2+1) ans += dp[i]; print(ans); return 0; }