結果

問題 No.1481 Rotation ABC
ユーザー Aoxiang CuiAoxiang Cui
提出日時 2021-10-07 00:06:06
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 9 ms / 2,000 ms
コード長 4,671 bytes
コンパイル時間 1,170 ms
コンパイル使用メモリ 117,488 KB
実行使用メモリ 6,912 KB
最終ジャッジ日時 2024-07-23 03:02:48
合計ジャッジ時間 2,500 ms
ジャッジサーバーID
(参考情報)
judge2 / judge3
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 4 ms
5,248 KB
testcase_01 AC 4 ms
5,376 KB
testcase_02 AC 4 ms
5,376 KB
testcase_03 AC 3 ms
5,376 KB
testcase_04 AC 3 ms
5,376 KB
testcase_05 AC 4 ms
5,376 KB
testcase_06 AC 4 ms
5,376 KB
testcase_07 AC 4 ms
5,376 KB
testcase_08 AC 4 ms
5,376 KB
testcase_09 AC 4 ms
5,376 KB
testcase_10 AC 4 ms
5,376 KB
testcase_11 AC 4 ms
5,376 KB
testcase_12 AC 4 ms
5,376 KB
testcase_13 AC 8 ms
6,400 KB
testcase_14 AC 8 ms
6,528 KB
testcase_15 AC 7 ms
6,400 KB
testcase_16 AC 7 ms
6,016 KB
testcase_17 AC 6 ms
5,888 KB
testcase_18 AC 8 ms
6,784 KB
testcase_19 AC 7 ms
5,760 KB
testcase_20 AC 6 ms
5,888 KB
testcase_21 AC 8 ms
6,528 KB
testcase_22 AC 7 ms
5,632 KB
testcase_23 AC 9 ms
6,784 KB
testcase_24 AC 8 ms
6,784 KB
testcase_25 AC 9 ms
6,784 KB
testcase_26 AC 9 ms
6,784 KB
testcase_27 AC 9 ms
6,912 KB
testcase_28 AC 8 ms
6,912 KB
testcase_29 AC 8 ms
6,784 KB
testcase_30 AC 7 ms
6,784 KB
testcase_31 AC 7 ms
6,912 KB
testcase_32 AC 8 ms
6,784 KB
testcase_33 AC 7 ms
6,912 KB
testcase_34 AC 7 ms
6,912 KB
testcase_35 AC 8 ms
6,784 KB
testcase_36 AC 8 ms
6,912 KB
testcase_37 AC 8 ms
6,784 KB
testcase_38 AC 7 ms
6,784 KB
testcase_39 AC 7 ms
6,784 KB
testcase_40 AC 8 ms
6,784 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

diff #

// #define LOCAL
#define _USE_MATH_DEFINES
#include <array>
#include <cassert>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <iomanip>
#include <string>
#include <sstream>
#include <vector>
#include <queue>
#include <stack>
#include <list>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <algorithm>
#include <complex>
#include <cmath>
#include <numeric>
#include <bitset>
#include <functional>
#include <random>
#include <ctime>

using namespace std;

template <typename A, typename B>
ostream& operator <<(ostream& out, const pair<A, B>& a) {
  out << "(" << a.first << "," << a.second << ")";
  return out;
}
template <typename T, size_t N>
ostream& operator <<(ostream& out, const array<T, N>& a) {
  out << "["; bool first = true;
  for (auto& v : a) { out << (first ? "" : ", "); out << v; first = 0;} out << "]";
  return out;
}
template <typename T>
ostream& operator <<(ostream& out, const vector<T>& a) {
  out << "["; bool first = true;
  for (auto v : a) { out << (first ? "" : ", "); out << v; first = 0;} out << "]";
  return out;
}
template <typename T, class Cmp>
ostream& operator <<(ostream& out, const set<T, Cmp>& a) {
  out << "{"; bool first = true;
  for (auto& v : a) { out << (first ? "" : ", "); out << v; first = 0;} out << "}";
  return out;
}
template <typename U, typename T, class Cmp>
ostream& operator <<(ostream& out, const map<U, T, Cmp>& a) {
  out << "{"; bool first = true;
  for (auto& p : a) { out << (first ? "" : ", "); out << p.first << ":" << p.second; first = 0;} out << "}";
  return out;
}
#ifdef LOCAL
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
#else
#define trace(...) 42
#endif
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
  cerr << name << ": " << arg1 << endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
  const char* comma = strchr(names + 1, ',');
  cerr.write(names, comma - names) << ": " << arg1 << " |";
  __f(comma + 1, args...);
}

template <class T> auto vect(const T& v, int n) { return vector<T>(n, v); }
template <class T, class... D> auto vect(const T& v, int n, D... m) {
  return vector<decltype(vect(v, m...))>(n, vect(v, m...));
}

typedef long long int64;
typedef pair<int, int> ii;
#define SZ(x) (int)((x).size())
template <typename T> static constexpr T inf = numeric_limits<T>::max() / 2;
// const int MOD = 1e9 + 7;
const int MOD = 998244353;
mt19937 mrand(random_device{}());
int rnd(int x) { return mrand() % x; }
// mt19937_64 mrand(random_device{}());
// int64 rnd(int64 x) { return mrand() % x; }
template <class T> void out(const vector<T>& a) { for (int i = 0; i < SZ(a); ++i) cout << a[i] << " \n"[i + 1 == SZ(a)]; }
template <class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template <class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
template <class T> void dedup(vector<T>& v) { sort(v.begin(), v.end()); v.erase(unique(v.begin(), v.end()), v.end()); }
void add(int& x, int y) { x += y; if (x >= MOD) x -= MOD; }

struct fast_ios {
  fast_ios() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(10);
  };
} fast_ios_;

const int N = 1e5 + 10;
int fact[N], ifact[N], inv[N];

struct comb_init {
  comb_init() {
    inv[1] = 1;
    for (int i = 2; i < N; ++i) {
      inv[i] = (MOD - MOD / i) * (int64)inv[MOD % i] % MOD;
    }
    fact[0] = ifact[0] = 1;
    for (int i = 1; i < N; ++i) {
      fact[i] = (int64)fact[i - 1] * i % MOD;
      ifact[i] = (int64)ifact[i - 1] * inv[i] % MOD;
    }
  }
} comb_init_;

int64 comb(int n, int m) {
  if (n < m || m < 0) return 0;
  return (int64)fact[n] * ifact[m] % MOD * ifact[n - m] % MOD;
}

int main() {
  int n;
  string s;
  cin >> n >> s;
  vector<array<int, 3>> pre(n + 1);
  vector<array<int, 3>> suf(n + 1);

  for (int i = 0; i < n; ++i) {
    pre[i + 1] = pre[i];
    int k = s[i] - 'A';
    pre[i + 1][k]++;
  }
  for (int i = n - 1; i >= 0; --i) {
    suf[i] = suf[i + 1];
    int k = s[i] - 'A';
    suf[i][k]++;
  }
  bool found = false;
  for (int k = 0; k < 3; ++k) {
    for (int i = 0; i < n; ++i) {
      if (k == 1 && i == 2) trace(s[i] - 'A', pre[i][(k + 2) % 3], suf[i + 1][(k + 1) % 3]);
      if (s[i] - 'A' == k && pre[i][(k + 2) % 3] && suf[i + 1][(k + 1) % 3]) found = true;
    }
  }
  if (!found) {
    cout << 1 << '\n';
    return 0;
  }

  array<int, 3> cnt {};

  for (auto& c : s) {
    cnt[c - 'A']++;
  }
  int ret = fact[n];
  for (int k = 0; k < 3; ++k) {
    ret = 1LL * ret * ifact[cnt[k]] % MOD;
  }
  ret = (ret + MOD - n) % MOD;
  cout << ret << '\n';
  return 0;
}
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