結果
問題 | No.958 たぷりすたべる (回文) |
ユーザー | ei1333333 |
提出日時 | 2019-12-19 16:11:11 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,827 bytes |
コンパイル時間 | 2,148 ms |
コンパイル使用メモリ | 210,696 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-07-18 03:53:22 |
合計ジャッジ時間 | 3,824 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 |
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testcase_00 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
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testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | WA | - |
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testcase_52 | WA | - |
testcase_53 | WA | - |
testcase_54 | WA | - |
ソースコード
#include <bits/stdc++.h> using namespace std; using int64 = long long; const int mod = 998244353; const int64 infll = (1LL << 62) - 1; const int inf = (1 << 30) - 1; struct IoSetup { IoSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(10); cerr << fixed << setprecision(10); } } iosetup; template< typename T1, typename T2 > ostream &operator<<(ostream &os, const pair< T1, T2 > &p) { os << p.first << " " << p.second; return os; } template< typename T1, typename T2 > istream &operator>>(istream &is, pair< T1, T2 > &p) { is >> p.first >> p.second; return is; } template< typename T > ostream &operator<<(ostream &os, const vector< T > &v) { for(int i = 0; i < (int) v.size(); i++) { os << v[i] << (i + 1 != v.size() ? " " : ""); } return os; } template< typename T > istream &operator>>(istream &is, vector< T > &v) { for(T &in : v) is >> in; return is; } template< typename T1, typename T2 > inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); } template< typename T1, typename T2 > inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); } template< typename T = int64 > vector< T > make_v(size_t a) { return vector< T >(a); } template< typename T, typename... Ts > auto make_v(size_t a, Ts... ts) { return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...)); } template< typename T, typename V > typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) { t = v; } template< typename T, typename V > typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) { for(auto &e : t) fill_v(e, v); } template< typename F > struct FixPoint : F { FixPoint(F &&f) : F(forward< F >(f)) {} template< typename... Args > decltype(auto) operator()(Args &&... args) const { return F::operator()(*this, forward< Args >(args)...); } }; template< typename F > inline decltype(auto) MFP(F &&f) { return FixPoint< F >{forward< F >(f)}; } vector< int > manacher(const string &s) { vector< int > radius(s.size()); int i = 0, j = 0; while(i < s.size()) { while(i - j >= 0 && i + j < s.size() && s[i - j] == s[i + j]) { ++j; } radius[i] = j; int k = 1; while(i - k >= 0 && i + k < s.size() && k + radius[i - k] < j) { radius[i + k] = radius[i - k]; ++k; } i += k; j -= k; } return radius; } 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^=(int64_t n) { int y = x; x = 1; while(n > 0) { if(n & 1) x = 1LL * x * y % mod; y = 1LL * y * y % mod; n >>= 1; } 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; } ModInt operator^(const int64_t n) const { return ModInt(*this) ^= n; } 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; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } return ModInt(u); } friend ostream &operator<<(ostream &os, const ModInt< mod > &p) { return os << p.x; } friend istream &operator>>(istream &is, ModInt< mod > &a) { int64_t t; is >> t; a = ModInt< mod >(t); return (is); } }; using modint = ModInt< mod >; template< typename T > struct Combination { vector< T > _fact, _rfact; Combination(int sz) : _fact(sz + 1), _rfact(sz + 1) { _fact[0] = _rfact[sz] = 1; for(int i = 1; i <= sz; i++) _fact[i] = _fact[i - 1] * i; _rfact[sz] /= _fact[sz]; for(int i = sz - 1; i >= 0; i--) _rfact[i] = _rfact[i + 1] * (i + 1); } inline T fact(int k) const { return _fact[k]; } inline T rfact(int k) const { return _rfact[k]; } T P(int n, int r) const { if(r < 0 || n < r) return 0; return fact(n) * rfact(n - r); } T C(int p, int q) const { if(q < 0 || p < q) return 0; return fact(p) * rfact(q) * rfact(p - q); } T H(int n, int r) const { if(n < 0 || r < 0) return (0); return r == 0 ? 1 : C(n + r - 1, r); } }; template< typename T > T lagrange_polynomial(const vector< T > &y, int64_t t) { int N = y.size() - 1; Combination< T > comb(N); if(t <= N) return y[t]; T ret(0); vector< T > dp(N + 1, 1), pd(N + 1, 1); for(int i = 0; i < N; i++) dp[i + 1] = dp[i] * (t - i); for(int i = N; i > 0; i--) pd[i - 1] = pd[i] * (t - i); for(int i = 0; i <= N; i++) { T tmp = y[i] * dp[i] * pd[i] * comb.rfact(i) * comb.rfact(N - i); if((N - i) & 1) ret -= tmp; else ret += tmp; } return ret; } int main() { string S; cin >> S; int K; cin >> K; int uku = min(K, 4); vector< modint > tap; string P = "$"; for(int i = 0; i < 4; i++) { for(auto c : S) { P += c; P += "$"; } auto ret = manacher(P); int64 sum = 0; for(auto t : ret) sum += t / 2; tap.emplace_back(sum); } cout << lagrange_polynomial< modint >(tap, K - 1) << endl; }