結果
問題 | No.1702 count good string |
ユーザー |
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提出日時 | 2021-12-08 01:49:32 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 125 ms / 2,000 ms |
コード長 | 3,759 bytes |
コンパイル時間 | 943 ms |
コンパイル使用メモリ | 82,084 KB |
最終ジャッジ日時 | 2025-01-26 06:43:50 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 47 |
ソースコード
#include <algorithm>#include <iostream>#include <numeric>#include <string>#include <tuple>#include <utility>#include <vector>#define rep(i, a, b) for (int i = int(a); i < int(b); i++)using namespace std;using ll = long long int;using P = pair<ll, ll>;// clang-format off#ifdef _DEBUG_#define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; debug_print(__VA_ARGS__); } while(false)template<typename T, typename... Ts> void debug_print(const T &t, const Ts &...ts) { cerr << t; ((cerr << ", " << ts), ...); cerr << endl; }#else#define dump(...) do{ } while(false)#endiftemplate<typename T> vector<T> make_v(size_t a, T b) { return vector<T>(a, b); }template<typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v(ts...))>(a, make_v(ts...)); }template<typename T> bool chmin(T &a, const T& b) { if (a > b) {a = b; return true; } return false; }template<typename T> bool chmax(T &a, const T& b) { if (a < b) {a = b; return true; } return false; }template<typename T, typename... Ts> void print(const T& t, const Ts&... ts) { cout << t; ((cout << ' ' << ts), ...); cout << '\n'; }template<typename... Ts> void input(Ts&... ts) { (cin >> ... >> ts); }template<typename T> istream &operator,(istream &in, T &t) { return in >> t; }// clang-format ontemplate<ll MOD = 1000000007>class ModInt {ll n;ModInt constexpr inverse() const {return ModInt::pow(*this, MOD - 2);}public:ModInt() : n(0) {}ModInt(ll _n) : n(((_n % MOD) + MOD) % MOD) {}ModInt operator+=(const ModInt &m) {n += m.n;if (n >= MOD) n -= MOD;return *this;}ModInt operator-=(const ModInt &m) {n -= m.n;if (n < 0) n += MOD;return *this;}ModInt operator*=(const ModInt &m) {n *= m.n;if (n >= MOD) n %= MOD;return *this;}ModInt operator/=(const ModInt &m) {(*this) *= m.inverse();return *this;}friend ModInt operator+(ModInt t, const ModInt &m) {return t += m;}friend ModInt operator-(ModInt t, const ModInt &m) {return t -= m;}friend ModInt operator*(ModInt t, const ModInt &m) {return t *= m;}friend ModInt operator/(ModInt t, const ModInt &m) {return t /= m;}ModInt operator=(const ll l) {n = l % MOD;if (n < 0) n += MOD;return *this;}friend ostream &operator<<(ostream &out, const ModInt &m) {out << m.n;return out;}friend istream &operator>>(istream &in, ModInt &m) {ll l;in >> l;m = l;return in;}static constexpr ModInt pow(const ModInt x, ll p) {ModInt<MOD> ans = 1;for (ModInt<MOD> m = x; p > 0; p /= 2, m *= m) {if (p % 2) ans *= m;}return ans;}static constexpr ll mod() {return MOD;}};using mint = ModInt<>;mint operator"" _m(unsigned long long m) {return mint(m);}int main() {cin.tie(nullptr);ios::sync_with_stdio(false);int n;string s;cin, n, s;const string t = "yukicoder";const int m = t.size();auto dp = make_v(n + 1, m + 1, 2, 0_m);dp[0][0][0] = 1;rep(i, 0, n) {rep(j, 0, m + 1) {rep(k, 0, 2) {dp[i + 1][j][k] += dp[i][j][k];}if (j < m && s[i] == t[j]) {rep(k, 0, 2) {dp[i + 1][j + 1][k] += dp[i][j][k];}}if (j < m && s[i] == '?') {dp[i + 1][j + 1][1] += dp[i][j][0];}}}print(dp[n][m][0] + dp[n][m][1]);return 0;}