結果
問題 | No.2131 Concon Substrings (COuNt Version) |
ユーザー | k1suxu |
提出日時 | 2022-11-25 22:23:24 |
言語 | C++23 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 998 ms / 2,000 ms |
コード長 | 8,413 bytes |
コンパイル時間 | 4,768 ms |
コンパイル使用メモリ | 280,064 KB |
実行使用メモリ | 496,000 KB |
最終ジャッジ日時 | 2024-11-15 02:48:24 |
合計ジャッジ時間 | 11,360 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
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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
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 415 ms
226,944 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 985 ms
496,000 KB |
testcase_08 | AC | 268 ms
126,592 KB |
testcase_09 | AC | 998 ms
495,488 KB |
testcase_10 | AC | 958 ms
493,568 KB |
testcase_11 | AC | 661 ms
345,344 KB |
testcase_12 | AC | 611 ms
327,552 KB |
testcase_13 | AC | 2 ms
6,816 KB |
testcase_14 | AC | 275 ms
147,328 KB |
testcase_15 | AC | 222 ms
119,552 KB |
testcase_16 | AC | 4 ms
6,820 KB |
testcase_17 | AC | 202 ms
106,880 KB |
testcase_18 | AC | 203 ms
108,288 KB |
testcase_19 | AC | 97 ms
56,320 KB |
ソースコード
#pragma GCC target("avx") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> using namespace std; #define rep(i,n) for(int i = 0; i < (int)n; i++) #define FOR(n) for(int i = 0; i < (int)n; i++) #define repi(i,a,b) for(int i = (int)a; i < (int)b; i++) #define pb push_back #define all(x) x.begin(),x.end() //#define mp make_pair #define vi vector<int> #define vvi vector<vi> #define vll vector<ll> #define vvll vector<vll> #define vs vector<string> #define vvs vector<vs> #define vc vector<char> #define vvc vector<vc> #define pii pair<int,int> #define pllll pair<ll,ll> #define vpii vector<pair<int,int>> #define vpllll vector<pair<ll,ll>> #define vpis vector<pair<int,string>> #define vplls vector<pair<ll, string>> #define vpsi vector<pair<string, int>> #define vpsll vector<pair<string, ll>> template<typename T> void chmax(T &a, const T &b) {a = (a > b? a : b);} template<typename T> void chmin(T &a, const T &b) {a = (a < b? a : b);} using ll = long long; using ld = long double; using ull = unsigned long long; const ll INF = numeric_limits<long long>::max() / 2; const ld pi = 3.1415926535897932384626433832795028; const ll mod = 998244353; int dx[] = {-1, 0, 1, 0, -1, -1, 1, 1}; int dy[] = {0, -1, 0, 1, -1, 1, -1, 1}; #define int long long template<int MOD> struct Modular_Int { int x; Modular_Int() = default; Modular_Int(int x_) : x(x_ >= 0? x_%MOD : (MOD-(-x_)%MOD)%MOD) {} int val() const { return (x%MOD+MOD)%MOD; } int get_mod() const { return MOD; } Modular_Int<MOD>& operator^=(int d) { Modular_Int<MOD> ret(1); int nx = x; while(d) { if(d&1) ret *= nx; (nx *= nx) %= MOD; d >>= 1; } *this = ret; return *this; } Modular_Int<MOD> operator^(int d) const {return Modular_Int<MOD>(*this) ^= d;} Modular_Int<MOD> pow(int d) const {return Modular_Int<MOD>(*this) ^= d;} //use this basically Modular_Int<MOD> inv() const { return Modular_Int<MOD>(*this) ^ (MOD-2); } //only if the module number is not prime //Don't use. This is broken. // Modular_Int<MOD> inv() const { // int a = (x%MOD+MOD)%MOD, b = MOD, u = 1, v = 0; // while(b) { // int t = a/b; // a -= t*b, swap(a, b); // u -= t*v, swap(u, v); // } // return Modular_Int<MOD>(u); // } Modular_Int<MOD>& operator+=(const Modular_Int<MOD> other) { if((x += other.x) >= MOD) x -= MOD; return *this; } Modular_Int<MOD>& operator-=(const Modular_Int<MOD> other) { if((x -= other.x) < 0) x += MOD; return *this; } Modular_Int<MOD>& operator*=(const Modular_Int<MOD> other) { int z = x; z *= other.x; z %= MOD; x = z; if(x < 0) x += MOD; return *this; } Modular_Int<MOD>& operator/=(const Modular_Int<MOD> other) { return *this = *this * other.inv(); } Modular_Int<MOD>& operator++() { x++; if (x == MOD) x = 0; return *this; } Modular_Int<MOD>& operator--() { if (x == 0) x = MOD; x--; return *this; } Modular_Int<MOD> operator+(const Modular_Int<MOD> other) const {return Modular_Int<MOD>(*this) += other;} Modular_Int<MOD> operator-(const Modular_Int<MOD> other) const {return Modular_Int<MOD>(*this) -= other;} Modular_Int<MOD> operator*(const Modular_Int<MOD> other) const {return Modular_Int<MOD>(*this) *= other;} Modular_Int<MOD> operator/(const Modular_Int<MOD> other) const {return Modular_Int<MOD>(*this) /= other;} Modular_Int<MOD>& operator+=(const int other) {Modular_Int<MOD> other_(other); *this += other_; return *this;} Modular_Int<MOD>& operator-=(const int other) {Modular_Int<MOD> other_(other); *this -= other_; return *this;} Modular_Int<MOD>& operator*=(const int other) {Modular_Int<MOD> other_(other); *this *= other_; return *this;} Modular_Int<MOD>& operator/=(const int other) {Modular_Int<MOD> other_(other); *this /= other_; return *this;} Modular_Int<MOD> operator+(const int other) const {return Modular_Int<MOD>(*this) += other;} Modular_Int<MOD> operator-(const int other) const {return Modular_Int<MOD>(*this) -= other;} Modular_Int<MOD> operator*(const int other) const {return Modular_Int<MOD>(*this) *= other;} Modular_Int<MOD> operator/(const int other) const {return Modular_Int<MOD>(*this) /= other;} bool operator==(const Modular_Int<MOD> other) const {return (*this).val() == other.val();} bool operator!=(const Modular_Int<MOD> other) const {return (*this).val() != other.val();} bool operator==(const int other) const {return (*this).val() == other;} bool operator!=(const int other) const {return (*this).val() != other;} Modular_Int<MOD> operator-() const {return Modular_Int<MOD>(0LL)-Modular_Int<MOD>(*this);} //入れ子にしたい // friend constexpr istream& operator>>(istream& is, mint& x) noexcept { // int X; // is >> X; // x = X; // return is; // } // friend constexpr ostream& operator<<(ostream& os, mint& x) { // os << x.val(); // return os; // } }; // const int MOD_VAL = 1e9+7; const int MOD_VAL = 998244353; using mint = Modular_Int<MOD_VAL>; istream& operator>>(istream& is, mint& x) { int X; is >> X; x = X; return is; } ostream& operator<<(ostream& os, mint& x) { os << x.val(); return os; } // istream& operator<<(istream& is, mint &a) { // int x; // is >> x; // a = mint(x); // return is; // } // ostream& operator<<(ostream& os, mint a) { // os << a.val(); // return os; // } vector<mint> f = {1}, rf = {1}; void init(int n) { f.resize(n, 0); rf.resize(n, 0); f[0] = 1; repi(i, 1, n) f[i] = (f[i - 1] * i); repi(i, 0, n) rf[i] = f[i].inv(); } mint P(int n, int k) { assert(n>=k); while(n > f.size()-1) { f.push_back(f.back() * f.size()); rf.push_back(f.back().inv()); } return f[n] * f[n-k]; } mint C(int n, int k) { assert(n>=k); while(n > f.size()-1) { f.push_back(f.back() * f.size()); rf.push_back(f.back().inv()); } return f[n]*rf[n-k]*rf[k]; } mint H(int n, int k) { assert(n>=1); return C(n+k-1, k); } mint Cat(int n) { return C(2*n, n)-C(2*n, n-1); } void solve() { int n; cin >> n; vector<vector<vector<mint>>> dp(n+1, vector<vector<mint>>(n, vector<mint>(3, 0))); dp[0][0][0] = 1; rep(i, n) { rep(k, n) rep(l, 3) dp[i+1][k][l] += dp[i][k][l] * 23; rep(j, n) rep(k, 3) rep(l, 3) { if(k == l) { if(k == 2) { if(j != n-1) dp[i+1][j+1][0] += dp[i][j][2]; }else { dp[i+1][j][l+1] += dp[i][j][l]; } }else { dp[i+1][j][l] += dp[i][j][l]; } } } mint ans = 0; rep(i, n) rep(j, 3) ans += dp[n][i][j] * i; cout << ans.val() << endl; // mint ans = 0; // mint minus = 0; // for(int i = n/3; i >= 1; i--) { // mint now = C(n, 3*i) * mint(26)^(n-3*i); // ans += (now - minus) * i; // minus += now; // } // cout << ans.val() << endl; } // void naive() { // auto score = [](string s) -> int { // string t = "con"; // int tar = 0, ret = 0; // rep(i, s.size()) { // if(s[i] == t[tar]) { // tar++; // if(tar == 3) { // ret++; // tar = 0; // } // } // } // return ret; // }; // int n; // cin >> n; // string s = ""; // int ans = 0; // auto dfs = [&](int len, auto self) -> void { // if(len == n) { // if(score(s) > 0) cout << s << " -> " << score(s) << endl; // ans += score(s); // return; // } // rep(i, 26) { // s.push_back((char)('a' + i)); // self(len+1, self); // s.pop_back(); // } // }; // dfs(0, dfs); // cout << ans << endl; // } signed main() { cin.tie(nullptr); ios::sync_with_stdio(false); solve(); // naive(); return 0; }