結果

問題 No.1481 Rotation ABC
ユーザー ningenMeningenMe
提出日時 2021-04-17 04:26:34
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 8 ms / 2,000 ms
コード長 6,879 bytes
コンパイル時間 3,165 ms
コンパイル使用メモリ 215,872 KB
実行使用メモリ 6,536 KB
最終ジャッジ日時 2023-09-16 09:42:56
合計ジャッジ時間 4,748 ms
ジャッジサーバーID
（参考情報） 		judge14 / judge13
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 2 ms
4,376 KB
testcase_01 AC 2 ms
4,380 KB
testcase_02 AC 2 ms
4,376 KB
testcase_03 AC 1 ms
4,384 KB
testcase_04 AC 1 ms
4,380 KB
testcase_05 AC 2 ms
4,376 KB
testcase_06 AC 1 ms
4,380 KB
testcase_07 AC 2 ms
4,380 KB
testcase_08 AC 2 ms
4,384 KB
testcase_09 AC 1 ms
4,380 KB
testcase_10 AC 2 ms
4,380 KB
testcase_11 AC 1 ms
4,376 KB
testcase_12 AC 2 ms
4,384 KB
testcase_13 AC 6 ms
5,688 KB
testcase_14 AC 6 ms
5,916 KB
testcase_15 AC 6 ms
5,652 KB
testcase_16 AC 5 ms
5,144 KB
testcase_17 AC 5 ms
4,904 KB
testcase_18 AC 7 ms
5,932 KB
testcase_19 AC 5 ms
4,948 KB
testcase_20 AC 5 ms
4,880 KB
testcase_21 AC 7 ms
5,924 KB
testcase_22 AC 4 ms
4,676 KB
testcase_23 AC 7 ms
6,476 KB
testcase_24 AC 8 ms
6,516 KB
testcase_25 AC 8 ms
6,492 KB
testcase_26 AC 7 ms
6,464 KB
testcase_27 AC 7 ms
6,536 KB
testcase_28 AC 3 ms
4,380 KB
testcase_29 AC 3 ms
4,376 KB
testcase_30 AC 2 ms
4,380 KB
testcase_31 AC 5 ms
5,952 KB
testcase_32 AC 4 ms
5,980 KB
testcase_33 AC 5 ms
6,048 KB
testcase_34 AC 5 ms
5,948 KB
testcase_35 AC 5 ms
5,924 KB
testcase_36 AC 5 ms
5,980 KB
testcase_37 AC 5 ms
5,928 KB
testcase_38 AC 5 ms
5,976 KB
testcase_39 AC 4 ms
6,108 KB
testcase_40 AC 5 ms
5,948 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 # 

#include <bits/stdc++.h>
using namespace std;
using int128  = __int128_t;
using int64   = long long;
using int32   = int;
using uint128 = __uint128_t;
using uint64  = unsigned long long;
using uint32  = unsigned int;

#define ALL(obj) (obj).begin(),(obj).end()
template<class T> using priority_queue_reverse = priority_queue<T,vector<T>,greater<T>>;

constexpr int64 MOD = 1'000'000'000LL + 7; //'
constexpr int64 MOD2 = 998244353;
constexpr int64 HIGHINF = 1'000'000'000'000'000'000LL;
constexpr int64 LOWINF = 1'000'000'000'000'000LL; //'
constexpr long double PI = 3.1415926535897932384626433L;

template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const deque<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
vector<string> split(const string &str, const char delemiter) {vector<string> res;stringstream ss(str);string buffer; while( getline(ss, buffer, delemiter) ) res.push_back(buffer); return res;}
inline constexpr int msb(int x) {return x?31-__builtin_clz(x):-1;}
inline constexpr int64 ceil_div(const int64 a,const int64 b) {return (a+(b-1))/b;}// return ceil(a/b)
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}

/*
 * @title ModInt
 * @docs md/util/ModInt.md
 */
template<long long mod> class ModInt {
public:
    long long x;
    constexpr ModInt():x(0) {}
    constexpr ModInt(long long 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 long long y) {ModInt p(y);if((x += p.x) >= mod) x -= mod;return *this;}
    ModInt &operator+=(const int y) {ModInt p(y);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 long long y) {ModInt p(y);if((x += mod - p.x) >= mod) x -= mod;return *this;}
    ModInt &operator-=(const int y) {ModInt p(y);if((x += mod - p.x) >= mod) x -= mod;return *this;}
    ModInt &operator*=(const ModInt &p) {x = (x * p.x % mod);return *this;}
    ModInt &operator*=(const long long y) {ModInt p(y);x = (x * p.x % mod);return *this;}
    ModInt &operator*=(const int y) {ModInt p(y);x = (x * p.x % mod);return *this;}
    ModInt &operator^=(const ModInt &p) {x = (x ^ p.x) % mod;return *this;}
    ModInt &operator^=(const long long y) {ModInt p(y);x = (x ^ p.x) % mod;return *this;}
    ModInt &operator^=(const int y) {ModInt p(y);x = (x ^ p.x) % mod;return *this;}
    ModInt &operator/=(const ModInt &p) {*this *= p.inv();return *this;}
    ModInt &operator/=(const long long y) {ModInt p(y);*this *= p.inv();return *this;}
    ModInt &operator/=(const int y) {ModInt p(y);*this *= p.inv();return *this;}
    ModInt operator=(const int y) {ModInt p(y);*this = p;return *this;}
    ModInt operator=(const long long y) {ModInt p(y);*this = p;return *this;}
    ModInt operator-() const {return ModInt(-x); }
    ModInt operator++() {x++;if(x>=mod) x-=mod;return *this;}
    ModInt operator--() {x--;if(x<0) x+=mod;return *this;}
    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 ModInt &p) const { return ModInt(*this) ^= p; }
    bool operator==(const ModInt &p) const { return x == p.x; }
    bool operator!=(const ModInt &p) const { return x != p.x; }
    ModInt inv() const {int a=x,b=mod,u=1,v=0,t;while(b > 0) {t = a / b;swap(a -= t * b, b);swap(u -= t * v, v);} return ModInt(u);}
    ModInt pow(long long n) const {ModInt ret(1), mul(x);for(;n > 0;mul *= mul,n >>= 1) if(n & 1) ret *= mul;return ret;}
    friend ostream &operator<<(ostream &os, const ModInt &p) {return os << p.x;}
    friend istream &operator>>(istream &is, ModInt &a) {long long t;is >> t;a = ModInt<mod>(t);return (is);}
};
using modint = ModInt<MOD2>;

/**
 * @url 
 * @est
 */ 
int main() {
    cin.tie(0);ios::sync_with_stdio(false);
    int N; cin >> N;
    string S; cin >> S;
    map<int,int> mp;
    for(char c:S) mp[c-'A']++;
    corner(!mp[0] || !mp[1] || !mp[2], 1);
    vector<int> LA(N,0),LB(N,0),LC(N,0);
    vector<int> RA(N,0),RB(N,0),RC(N,0);
    LA[0] = (S[0]=='A');
    LB[0] = (S[0]=='B');
    LC[0] = (S[0]=='C');
    for(int i=1;i<N;++i) {
        LA[i] = (S[i]=='A') | LA[i-1];
        LB[i] = (S[i]=='B') | LB[i-1];
        LC[i] = (S[i]=='C') | LC[i-1];
    }
    RA[N-1] = (S[N-1]=='A');
    RB[N-1] = (S[N-1]=='B');
    RC[N-1] = (S[N-1]=='C');
    for(int i=N-2;0<=i;--i) {
        RA[i] = (S[i]=='A') | RA[i+1];
        RB[i] = (S[i]=='B') | RB[i+1];
        RC[i] = (S[i]=='C') | RC[i+1];
    }
    int flg = 0;
    for(int i=1; i+1<N; ++i) {
        flg |= (LA[i-1] && S[i]=='B' && RC[i+1]);
        flg |= (LC[i-1] && S[i]=='A' && RB[i+1]);
        flg |= (LB[i-1] && S[i]=='C' && RA[i+1]);
    }
    corner(!flg,1);
    vector<modint> f(N+1,1);
    for(int i=1;i<=N;++i) f[i]=f[i-1]*i;
    cout << f[N]/f[mp[0]]/f[mp[1]]/f[mp[2]] - N << endl;
    return 0;
}
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