結果
問題 | No.599 回文かい |
ユーザー | はまやんはまやん |
提出日時 | 2017-11-25 01:20:41 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 166 ms / 4,000 ms |
コード長 | 4,820 bytes |
コンパイル時間 | 1,947 ms |
コンパイル使用メモリ | 179,624 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-05-05 11:59:03 |
合計ジャッジ時間 | 2,859 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,944 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 1 ms
6,944 KB |
testcase_08 | AC | 1 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,944 KB |
testcase_12 | AC | 3 ms
6,940 KB |
testcase_13 | AC | 3 ms
6,944 KB |
testcase_14 | AC | 98 ms
6,944 KB |
testcase_15 | AC | 8 ms
6,940 KB |
testcase_16 | AC | 144 ms
6,944 KB |
testcase_17 | AC | 166 ms
6,940 KB |
testcase_18 | AC | 2 ms
6,940 KB |
testcase_19 | AC | 1 ms
6,940 KB |
testcase_20 | AC | 1 ms
6,940 KB |
evil_0.txt | AC | 41 ms
6,940 KB |
ソースコード
#include<bits/stdc++.h> #define rep(i,a,b) for(int i=a;i<b;i++) #define rrep(i,a,b) for(int i=a;i>=b;i--) #define fore(i,a) for(auto &i:a) #pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } //--------------------------------------------------------------------------------------------------- template<int MOD> struct ModInt { static const int Mod = MOD; unsigned x; ModInt() : x(0) { } ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } int get() const { return (int)x; } ModInt &operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; } ModInt &operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; } ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; } ModInt &operator/=(ModInt that) { return *this *= that.inverse(); } ModInt operator+(ModInt that) const { return ModInt(*this) += that; } ModInt operator-(ModInt that) const { return ModInt(*this) -= that; } ModInt operator*(ModInt that) const { return ModInt(*this) *= that; } ModInt operator/(ModInt that) const { return ModInt(*this) /= that; } ModInt inverse() const { long long a = x, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); } return ModInt(u); } bool operator==(ModInt that) const { return x == that.x; } bool operator!=(ModInt that) const { return x != that.x; } ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; } }; template<int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; }; template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) { ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r; } typedef ModInt<1000000007> mint; typedef ModInt<1000000007> mint1; typedef ModInt<1000000009> mint2; int getrand(int l, int r) { // [l, r] static uint32_t y = time(NULL); y ^= (y << 13); y ^= (y >> 17); y ^= (y << 5); return y % (r - l + 1) + l; } struct RollingHash { int primes[10] = { 10007, 10009, 10037, 10039, 10061, 10067, 10069, 10079, 10091, 10093 }; mint1 p1; mint2 p2; int n; vector<mint1> m1; vector<mint2> m2; vector<mint1> v1; vector<mint2> v2; RollingHash() { rep(i, 0, 101) { int a = getrand(0, 9); int b = getrand(0, 9); swap(primes[a], primes[b]); } p1 = primes[0], p2 = primes[1]; } void init(string s, char o = 'a') { vector<int> v; fore(c, s) v.push_back(c - o); init(v); } void init(vector<int> s) { n = s.size(); m1.resize(n); m2.resize(n); v1.resize(n); v2.resize(n); m1[0] = 1; m2[0] = 1; v1[0] = s[0]; v2[0] = s[0]; rep(i, 1, n) { m1[i] = m1[i - 1] * p1; m2[i] = m2[i - 1] * p2; v1[i] = v1[i - 1] + m1[i] * s[i]; v2[i] = v2[i - 1] + m2[i] * s[i]; } } inline pair<mint1, mint2> hash(int l, int r) { // s[l..r] assert(l <= r); assert(r < n); mint1 a = v1[r]; if (l) a -= v1[l - 1]; a *= m1[n - 1 - r]; mint2 b = v2[r]; if (l) b -= v2[l - 1]; b *= m2[n - 1 - r]; return { a, b }; } }; /*--------------------------------------------------------------------------------------------------- ∧_∧ ∧_∧ (´<_` ) Welcome to My Coding Space! ( ´_ゝ`) / ⌒i / \ | | / / ̄ ̄ ̄ ̄/ | __(__ニつ/ _/ .| .|____ \/____/ (u ⊃ ---------------------------------------------------------------------------------------------------*/ string S; int N; RollingHash rh; //--------------------------------------------------------------------------------------------------- mint memo[10101]; int vis[10101]; mint f(int L, int R) { if (vis[L]) return memo[L]; mint res = 1; if (L == R) res = 1; else if (L + 1 == R) { if (S[L] == S[R]) res = 2; else res = 1; } else { int l = L + 1, r = R - 1; while (l - 1 <= r) { if (rh.hash(L, l - 1) == rh.hash(r + 1, R)) res += f(l, r); l++; r--; } } vis[L] = 1; return memo[L] = res; } //--------------------------------------------------------------------------------------------------- void _main() { cin >> S; N = S.length(); rh.init(S); cout << f(0, N - 1) << endl; }