結果
| 問題 |
No.599 回文かい
|
| コンテスト | |
| ユーザー |
はまやんはまやん
|
| 提出日時 | 2019-03-04 21:14:20 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,025 bytes |
| コンパイル時間 | 1,661 ms |
| コンパイル使用メモリ | 171,168 KB |
| 実行使用メモリ | 249,216 KB |
| 最終ジャッジ日時 | 2024-06-23 13:59:16 |
| 合計ジャッジ時間 | 3,537 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 5 WA * 17 |
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)
#define all(x) (x).begin(),(x).end()
//#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
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;
vector<int> Zalgorithm(string S) {
int N = S.length(); vector<int> res(N);
res[0] = N;
int i = 1, j = 0;
while (i < N) {
while (i + j < N and S[j] == S[i + j]) j++;
res[i] = j;
if (j == 0) { i++; continue; }
int k = 1;
while (i + k < N and k + res[k] < j) res[i + k] = res[k], k++;
i += k; j -= k;
}
return res;
}
/*---------------------------------------------------------------------------------------------------
∧_∧
∧_∧ (´<_` ) Welcome to My Coding Space!
( ´_ゝ`) / ⌒i
/ \ | |
/ / ̄ ̄ ̄ ̄/ |
__(__ニつ/ _/ .| .|____
\/____/ (u ⊃
---------------------------------------------------------------------------------------------------*/
string S;
int N;
//---------------------------------------------------------------------------------------------------
mint dp[10101];
int vis[10101];
mint solve(int L, int R) {
if (vis[L]) return dp[L];
vis[L] = 1;
int n = R - L + 1;
string s = S.substr(L, n);
string t = s;
reverse(all(t));
auto z = Zalgorithm(s + "#" + s);
mint res = 0;
rep(d, 1, n + 1) if(d <= z[n*2 - d]) {
if (n <= d * 2) {
res += 1;
break;
}
res += solve(L + d, R - d);
}
return dp[L] = res;
}
//---------------------------------------------------------------------------------------------------
void _main() {
cin >> S;
N = S.length();
cout << solve(0, N - 1) << endl;
}
はまやんはまやん