#688825 (C++17) No.1646 Avoid Palindrome

提出ソース

結果

問題	No.1646 Avoid Palindrome
ユーザー	stoq
提出日時	2021-08-13 21:34:53
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	1,523 ms / 3,000 ms
コード長	4,564 bytes
コンパイル時間	4,663 ms
コンパイル使用メモリ	268,176 KB
実行使用メモリ	169,344 KB
最終ジャッジ日時	2024-11-08 14:55:55
合計ジャッジ時間	43,206 ms
ジャッジサーバーID （参考情報）	judge5 / judge1

このコードへのチャレンジ
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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	181 ms 169,088 KB
testcase_01	AC	171 ms 169,088 KB
testcase_02	AC	174 ms 169,088 KB
testcase_03	AC	170 ms 169,088 KB
testcase_04	AC	835 ms 169,088 KB
testcase_05	AC	830 ms 169,088 KB
testcase_06	AC	816 ms 169,088 KB
testcase_07	AC	831 ms 169,088 KB
testcase_08	AC	832 ms 169,216 KB
testcase_09	AC	798 ms 169,216 KB
testcase_10	AC	820 ms 169,216 KB
testcase_11	AC	801 ms 169,344 KB
testcase_12	AC	836 ms 169,088 KB
testcase_13	AC	841 ms 169,216 KB
testcase_14	AC	1,417 ms 169,088 KB
testcase_15	AC	1,438 ms 169,216 KB
testcase_16	AC	1,401 ms 169,216 KB
testcase_17	AC	1,463 ms 169,216 KB
testcase_18	AC	1,424 ms 169,216 KB
testcase_19	AC	1,417 ms 169,216 KB
testcase_20	AC	1,423 ms 169,344 KB
testcase_21	AC	1,457 ms 169,216 KB
testcase_22	AC	1,413 ms 169,216 KB
testcase_23	AC	1,458 ms 169,216 KB
testcase_24	AC	1,523 ms 169,216 KB
testcase_25	AC	1,511 ms 169,216 KB
testcase_26	AC	1,516 ms 169,344 KB
testcase_27	AC	1,515 ms 169,216 KB
testcase_28	AC	1,511 ms 169,216 KB
testcase_29	AC	445 ms 169,216 KB
testcase_30	AC	442 ms 169,216 KB
testcase_31	AC	431 ms 169,216 KB
testcase_32	AC	434 ms 169,216 KB
testcase_33	AC	438 ms 169,088 KB
testcase_34	AC	1,518 ms 169,088 KB
testcase_35	AC	170 ms 169,088 KB
testcase_36	AC	174 ms 168,960 KB
testcase_37	AC	172 ms 169,088 KB
testcase_38	AC	173 ms 169,216 KB
testcase_39	AC	174 ms 169,088 KB
testcase_40	AC	171 ms 169,088 KB
testcase_41	AC	174 ms 168,960 KB
testcase_42	AC	169 ms 169,088 KB
testcase_43	AC	432 ms 169,216 KB

権限があれば一括ダウンロードができます

ソースコード

raw source code

#define MOD_TYPE 2

#pragma region Macros

#include <bits/stdc++.h>
using namespace std;

#include <atcoder/all>
using namespace atcoder;

#if 0
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
using Int = boost::multiprecision::cpp_int;
using lld = boost::multiprecision::cpp_dec_float_100;
#endif

#if 1
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif

using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
template <typename Q_type>
using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>;

#if MOD_TYPE == 1
constexpr ll MOD = ll(1e9 + 7);
#else
#if MOD_TYPE == 2
constexpr ll MOD = 998244353;
#else
constexpr ll MOD = 1000003;
#endif
#endif

using mint = static_modint<MOD>;
constexpr int INF = (int)1e9 + 10;
constexpr ll LINF = (ll)4e18;
constexpr double PI = acos(-1.0);
constexpr double EPS = 1e-11;
constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0};
constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0};

#define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#define REPI(i, m, n) for (int i = m; i < (int)(n); ++i)
#define repi(i, n) REPI(i, 0, n)
#define MP make_pair
#define MT make_tuple
#define YES(n) cout << ((n) ? "YES" : "NO") << "\n"
#define Yes(n) cout << ((n) ? "Yes" : "No") << "\n"
#define possible(n) cout << ((n) ? "possible" : "impossible") << "\n"
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << "\n"
#define Yay(n) cout << ((n) ? "Yay!" : ":(") << "\n"
#define all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";

struct io_init {
  io_init() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << setprecision(30) << setiosflags(ios::fixed);
  };
} io_init;
template <typename T>
inline bool chmin(T &a, T b) {
  if (a > b) {
    a = b;
    return true;
  }
  return false;
}
template <typename T>
inline bool chmax(T &a, T b) {
  if (a < b) {
    a = b;
    return true;
  }
  return false;
}
inline ll CEIL(ll a, ll b) { return (a + b - 1) / b; }
template <typename A, size_t N, typename T>
inline void Fill(A (&array)[N], const T &val) {
  fill((T *)array, (T *)(array + N), val);
}
template <typename T>
vector<T> compress(vector<T> &v) {
  vector<T> val = v;
  sort(all(val)), val.erase(unique(all(val)), val.end());
  for (auto &&vi : v) vi = lower_bound(all(val), vi) - val.begin();
  return val;
}
template <typename T, typename U>
constexpr istream &operator>>(istream &is, pair<T, U> &p) noexcept {
  is >> p.first >> p.second;
  return is;
}
template <typename T, typename U>
constexpr ostream &operator<<(ostream &os, pair<T, U> p) noexcept {
  os << p.first << " " << p.second;
  return os;
}
ostream &operator<<(ostream &os, mint m) {
  os << m.val();
  return os;
}

random_device seed_gen;
mt19937_64 engine(seed_gen());

struct BiCoef {
  vector<mint> fact_, inv_, finv_;
  BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1) {
    fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1);
    for (int i = 2; i < n; i++) {
      fact_[i] = fact_[i - 1] * i;
      inv_[i] = -inv_[MOD % i] * (MOD / i);
      finv_[i] = finv_[i - 1] * inv_[i];
    }
  }
  mint C(ll n, ll k) const noexcept {
    if (n < k || n < 0 || k < 0) return 0;
    return fact_[n] * finv_[k] * finv_[n - k];
  }
  mint P(ll n, ll k) const noexcept { return C(n, k) * fact_[k]; }
  mint H(ll n, ll k) const noexcept { return C(n + k - 1, k); }
  mint Ch1(ll n, ll k) const noexcept {
    if (n < 0 || k < 0) return 0;
    mint res = 0;
    for (int i = 0; i < n; i++)
      res += C(n, i) * mint(n - i).pow(k) * (i & 1 ? -1 : 1);
    return res;
  }
  mint fact(ll n) const noexcept {
    if (n < 0) return 0;
    return fact_[n];
  }
  mint inv(ll n) const noexcept {
    if (n < 0) return 0;
    return inv_[n];
  }
  mint finv(ll n) const noexcept {
    if (n < 0) return 0;
    return finv_[n];
  }
};

BiCoef bc(2000010);

#pragma endregion

mint dp[50010][27][27] = {};

void solve() {
  int n;
  string s;
  cin >> n >> s;
  dp[0][26][26] = 1;
  rep(i, n) rep(j, 27) rep(k, 27) {
    if (s[i] == '?') {
      rep(l, 26) {
        if (l != j and l != k) dp[i + 1][k][l] += dp[i][j][k];
      }
    } else {
      int l = s[i] - 'a';
      if (l != j and l != k) dp[i + 1][k][l] += dp[i][j][k];
    }
  }
  mint ans = 0;
  rep(j, 27) rep(k, 27) { ans += dp[n][j][k]; }
  cout << ans << "\n";
}

int main() { solve(); }

yukicoder

結果

テストケース

ソースコード