結果

問題 No.1646 Avoid Palindrome
ユーザー keijak
提出日時 2021-08-13 22:08:52
言語 C++17(gcc12)
(gcc 12.3.0 + boost 1.87.0)
結果
CE  
(最新)
AC  
(最初)
実行時間 -
コード長 3,381 bytes
コンパイル時間 6,047 ms
コンパイル使用メモリ 250,556 KB
最終ジャッジ日時 2025-01-23 19:35:06
ジャッジサーバーID
（参考情報） 		judge1 / judge4
このコードへのチャレンジ
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コンパイルエラー時のメッセージ・ソースコードは、提出者また管理者しか表示できないようにしております。（リジャッジ後のコンパイルエラーは公開されます）
ただし、clay言語の場合は開発者のデバッグのため、公開されます。

コンパイルメッセージ
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/cassert:44,
                 from /usr/include/atcoder/internal_type_traits.hpp:4,
                 from /usr/include/atcoder/internal_type_traits:1,
                 from /usr/include/atcoder/modint.hpp:13,
                 from /usr/include/atcoder/modint:1,
                 from main.cpp:8:
main.cpp: In function 'auto solve()':
main.cpp:95:15: error: call of overloaded 'ssize(std::string&)' is ambiguous
   95 |   assert(ssize(s) == n);
      |          ~~~~~^~~
main.cpp:23:12: note: candidate: 'int ssize(const T&) [with T = std::__cxx11::basic_string<char>]'
   23 | inline int ssize(const T &a) {
      |            ^~~~~
In file included from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/string:52,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/locale_classes.h:40,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/ios_base.h:41,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/ios:42,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/istream:38,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/sstream:38,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/complex:45,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/ccomplex:39,
                 from /home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/x86_64-pc-linux-gnu/bits/stdc++.h:54,
                 from main.cpp:1:
/home/linuxbrew/.linuxbrew/Cellar/gcc@12/12.4.0/include/c++/12/bits/range_access.h:351:5: note: candidate: 'constexpr std::common_type_t<long int, typename std::make_signed<decltype (__cont.size())>::type> std::ssize(const _Container&) [with _Container = __cxx11::basic_string<char>; common_type_t<long int, typename make_signed<dec

ソースコード

diff # 

#include <bits/stdc++.h>
#define REP_(i, a_, b_, a, b, ...) \
  for (int i = (a), END_##i = (b); i < END_##i; ++i)
#define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define ALL(x) std::begin(x), std::end(x)
using i64 = long long;

#include <atcoder/modint>
using Mint = atcoder::modint998244353;
std::ostream &operator<<(std::ostream &os, const Mint &m) {
  return os << m.val();
}

template<typename T, typename U>
inline bool chmax(T &a, U b) {
  return a < b and ((a = std::move(b)), true);
}
template<typename T, typename U>
inline bool chmin(T &a, U b) {
  return a > b and ((a = std::move(b)), true);
}
template<typename T>
inline int ssize(const T &a) {
  return (int) std::size(a);
}

template<typename T>
std::istream &operator>>(std::istream &is, std::vector<T> &a) {
  for (auto &x : a) is >> x;
  return is;
}
template<typename T, typename U>
std::ostream &operator<<(std::ostream &os, const std::pair<T, U> &a) {
  return os << "(" << a.first << ", " << a.second << ")";
}
template<typename Container>
std::ostream &print_seq(const Container &a, std::string_view sep = " ",
                        std::string_view ends = "\n",
                        std::ostream &os = std::cout) {
  auto b = std::begin(a), e = std::end(a);
  for (auto it = std::begin(a); it != e; ++it) {
    if (it != b) os << sep;
    os << *it;
  }
  return os << ends;
}
template<typename T, typename = void>
struct is_iterable : std::false_type {};
template<typename T>
struct is_iterable<T, std::void_t<decltype(std::begin(std::declval<T>())),
                                  decltype(std::end(std::declval<T>()))>>
    : std::true_type {
};

template<typename T, typename = std::enable_if_t<
    is_iterable<T>::value &&
        !std::is_same<T, std::string_view>::value &&
        !std::is_same<T, std::string>::value>>
std::ostream &operator<<(std::ostream &os, const T &a) {
  return print_seq(a, ", ", "", (os << "{")) << "}";
}

void print() { std::cout << "\n"; }
template<class T>
void print(const T &x) {
  std::cout << x << "\n";
}
template<typename Head, typename... Tail>
void print(const Head &head, Tail... tail) {
  std::cout << head << " ";
  print(tail...);
}

void read_from_cin() {}
template<typename T, typename... Ts>
void read_from_cin(T &value, Ts &...args) {
  std::cin >> value;
  read_from_cin(args...);
}
#define INPUT(type, ...) \
  type __VA_ARGS__;      \
  read_from_cin(__VA_ARGS__)

#ifdef MY_DEBUG
#include "debug_dump.hpp"
#else
#define DUMP(...)
#endif

using namespace std;

auto solve() {
  INPUT(int, n);
  INPUT(string, s);
  assert(ssize(s) == n);
  char nothing = 26;
  auto dp = vector(n + 1, vector(27, vector(27, Mint(0))));
  dp[0][nothing][nothing] = 1;

  REP(i, n) {
    REP(c, 26) {
      if (s[i] != '?' and (s[i] - 'a') != c) continue;
      REP(c1, 27) {
        REP(c2, 27) {
          if (c != c1 and c != c2) {
            dp[i + 1][c][c1] += dp[i][c1][c2];
          }
        }
      }
    }

//    if (i == 1) {
//      REP(c1, 27) {
//        char c = 'a' + c1;
//        DUMP(c, dp[i + 1][c1]);
//      }
//    }

  }
  Mint ans = 0;
  REP(c1, 27) REP(c2, 27) {
      ans += dp[n][c1][c2];
    }
  return ans;
}

int main() {
  ios_base::sync_with_stdio(false), cin.tie(nullptr);
  cout << std::fixed << std::setprecision(15);
  int t = 1;
  REP(test_case, t) {
    auto ans = solve();
    print(ans);
  }
}
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