#953563 (C++17) No.1702 count good string

• 問題: No.1702 count good string
• ユーザー: ゆにぽけ
• 提出日時: 2024-02-22 07:30:06
• 言語: C++17 (gcc 12.3.0 + boost 1.83.0)
• 結果: AC
• 実行時間: 47 ms / 2,000 ms
• コード長: 3,958 bytes
• コンパイル時間: 1,553 ms
• コンパイル使用メモリ: 136,864 KB
• 実行使用メモリ: 6,820 KB
• 最終ジャッジ日時: 2024-09-29 04:24:46
• 合計ジャッジ時間: 4,191 ms
• ジャッジサーバーID （参考情報）: judge1 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	2 ms; 6,816 KB
testcase_01	AC	2 ms; 6,816 KB
testcase_02	AC	2 ms; 6,816 KB
testcase_03	AC	2 ms; 6,816 KB
testcase_04	AC	2 ms; 6,820 KB
testcase_05	AC	2 ms; 6,820 KB
testcase_06	AC	2 ms; 6,820 KB
testcase_07	AC	2 ms; 6,820 KB
testcase_08	AC	2 ms; 6,820 KB
testcase_09	AC	2 ms; 6,820 KB
testcase_10	AC	2 ms; 6,816 KB
testcase_11	AC	2 ms; 6,816 KB
testcase_12	AC	2 ms; 6,820 KB
testcase_13	AC	46 ms; 6,816 KB
testcase_14	AC	45 ms; 6,820 KB
testcase_15	AC	46 ms; 6,816 KB
testcase_16	AC	46 ms; 6,816 KB
testcase_17	AC	45 ms; 6,820 KB
testcase_18	AC	45 ms; 6,820 KB
testcase_19	AC	46 ms; 6,820 KB
testcase_20	AC	46 ms; 6,816 KB
testcase_21	AC	47 ms; 6,820 KB
testcase_22	AC	44 ms; 6,816 KB
testcase_23	AC	2 ms; 6,816 KB
testcase_24	AC	2 ms; 6,820 KB
testcase_25	AC	3 ms; 6,816 KB
testcase_26	AC	2 ms; 6,820 KB
testcase_27	AC	2 ms; 6,816 KB
testcase_28	AC	2 ms; 6,820 KB
testcase_29	AC	2 ms; 6,820 KB
testcase_30	AC	2 ms; 6,816 KB
testcase_31	AC	2 ms; 6,816 KB
testcase_32	AC	2 ms; 6,820 KB
testcase_33	AC	40 ms; 6,820 KB
testcase_34	AC	39 ms; 6,816 KB
testcase_35	AC	39 ms; 6,820 KB
testcase_36	AC	39 ms; 6,820 KB
testcase_37	AC	38 ms; 6,816 KB
testcase_38	AC	40 ms; 6,816 KB
testcase_39	AC	40 ms; 6,816 KB
testcase_40	AC	39 ms; 6,816 KB
testcase_41	AC	40 ms; 6,816 KB
testcase_42	AC	40 ms; 6,820 KB
testcase_43	AC	41 ms; 6,816 KB
testcase_44	AC	37 ms; 6,816 KB
testcase_45	AC	2 ms; 6,820 KB
testcase_46	AC	2 ms; 6,820 KB
testcase_47	AC	2 ms; 6,816 KB
testcase_48	AC	2 ms; 6,820 KB
testcase_49	AC	2 ms; 6,816 KB

ソースコード

#include <iostream>
#include <vector>
#include <algorithm>
#include <array>
#include <iterator>
#include <string>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <cassert>
#include <cmath>
#include <ctime>
#include <iomanip>
#include <numeric>
#include <stack>
#include <queue>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <bitset>
#include <random>
#include <utility>
#include <functional>
using namespace std;
template<int m> struct modint
{
	private:
	unsigned int value;
	static constexpr int mod() {return m;}

	public:
	constexpr modint(const long long x = 0) noexcept
	{
		long long y = x;
		if(y < 0 || y >= mod())
		{
			y %= mod();
			if(y < 0) y += mod();
		}
		value = (unsigned int)y;
	}
	constexpr unsigned int val() noexcept {return value;}
	constexpr modint &operator+=(const modint &other) noexcept
	{
		value += other.value;
		if(value >= mod()) value -= mod();
		return *this;
	}
	constexpr modint &operator-=(const modint &other) noexcept
	{
		unsigned int x = value;
		if(x < other.value) x += mod();
		x -= other.value;
		value = x;
		return *this;
	}
	constexpr modint &operator*=(const modint &other) noexcept
	{
		unsigned long long x = value;
		x *= other.value;
		value = (unsigned int) (x % mod());
		return *this;
	}
	constexpr modint &operator/=(const modint &other) noexcept
	{
		return *this *= other.inverse();
	}
	constexpr modint inverse() const noexcept
	{
		assert(value);
		long long a = value,b = mod(),x = 1,y = 0;
		while(b)
		{
			long long q = a/b;
			a -= q*b; swap(a,b);
			x -= q*y; swap(x,y);
		}
		return modint(x);
	}
	constexpr modint power(long long N) const noexcept
	{
		assert(N >= 0);
		modint p = *this,ret = 1;
		while(N)
		{
			if(N & 1) ret *= p;
			p *= p;
			N >>= 1;
		}
		return ret;
	}
	constexpr modint operator+() {return *this;}
	constexpr modint operator-() {return modint() - *this;}
	constexpr modint &operator++(int) noexcept {return *this += 1;}
	constexpr modint &operator--(int) noexcept {return *this -= 1;}
	friend modint operator+(const modint& lhs, const modint& rhs) {return modint(lhs) += rhs;}
	friend modint operator-(const modint& lhs, const modint& rhs) {return modint(lhs) -= rhs;}
	friend modint operator*(const modint& lhs, const modint& rhs) {return modint(lhs) *= rhs;}
	friend modint operator/(const modint& lhs, const modint& rhs) {return modint(lhs) /= rhs;}
	friend ostream &operator<<(ostream &os,const modint &x) {return os << x.value;}
};
/* using mint = modint<998244353>; */
using mint = modint<1000000007>;

template<class S>
struct combination
{
	private:
	vector<S> f,invf;

	public:
	combination(int N = 0) : f(1,1),invf(1,1)
	{
		update(N);
	}

	void update(int N)
	{
		if((int)f.size() > N) return;
		int pi = (int)f.size();
		N = max(N,pi*2);

		f.resize(N+1),invf.resize(N+1);

		for(int i = pi;i <= N;i++) f[i] = f[i-1]*i;
		invf[N] = S(1)/f[N];
		for(int i = N-1;i >= pi;i--) invf[i] = invf[i+1]*(i+1);
	}

	S factorial(int N)
	{
		update(N);
		return f[N];
	}

	S invfactorial(int N)
	{
		update(N);
		return invf[N];
	}

	S P(int N,int K)
	{
		assert(0 <= K && K <= N);
		update(N);
		return f[N]*invf[N-K];
	}

	S C(int N,int K)
	{
		assert(0 <= K && K <= N);
		update(N);
		return f[N]*invf[K]*invf[N-K];
	}
};
combination<mint> C;
void Main()
{
	int N;
	string S;
	cin >> N >> S;
	vector<string> T = {"yukicoder"};
	for(int i = 0;i < 9;i++)
	{
		string U = T[0];
		U[i] = '?';
		T.push_back(U);
	}
	mint ans = 0;
	for(int k = 0;k < (int)T.size();k++)
	{
		const string U = T[k];
		vector<mint> dp(10);
		dp[0] = 1;
		for(int i = 0;i < N;i++)
		{
			vector<mint> n_dp(10);
			for(int j = 0;j <= 9;j++)
			{
				n_dp[j] += dp[j];
				if(j < 9 && S[i] == U[j])
				{
					n_dp[j + 1] += dp[j];
				}
			}
			swap(dp,n_dp);
		}
		ans += dp[9];
	}
	cout << ans << "\n";
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int tt = 1;
	/* cin >> tt; */
	while(tt--) Main();
}