結果
問題 | No.1740 Alone 'a' |
ユーザー | kaikey |
提出日時 | 2021-11-12 22:01:13 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 52 ms / 2,000 ms |
コード長 | 6,092 bytes |
コンパイル時間 | 2,227 ms |
コンパイル使用メモリ | 214,508 KB |
実行使用メモリ | 33,152 KB |
最終ジャッジ日時 | 2024-11-25 18:30:27 |
合計ジャッジ時間 | 4,246 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | 52 ms
33,024 KB |
testcase_04 | AC | 52 ms
33,152 KB |
testcase_05 | AC | 4 ms
5,248 KB |
testcase_06 | AC | 3 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 11 ms
8,576 KB |
testcase_12 | AC | 43 ms
27,264 KB |
testcase_13 | AC | 41 ms
25,856 KB |
testcase_14 | AC | 50 ms
31,616 KB |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 38 ms
24,960 KB |
testcase_17 | AC | 3 ms
5,248 KB |
testcase_18 | AC | 8 ms
6,784 KB |
testcase_19 | AC | 42 ms
27,264 KB |
testcase_20 | AC | 25 ms
15,744 KB |
testcase_21 | AC | 33 ms
20,224 KB |
testcase_22 | AC | 36 ms
23,808 KB |
testcase_23 | AC | 37 ms
23,552 KB |
testcase_24 | AC | 26 ms
15,872 KB |
testcase_25 | AC | 27 ms
15,872 KB |
testcase_26 | AC | 34 ms
19,968 KB |
testcase_27 | AC | 36 ms
21,376 KB |
testcase_28 | AC | 30 ms
17,920 KB |
testcase_29 | AC | 50 ms
31,616 KB |
testcase_30 | AC | 35 ms
20,864 KB |
testcase_31 | AC | 37 ms
24,448 KB |
testcase_32 | AC | 30 ms
18,432 KB |
testcase_33 | AC | 36 ms
24,192 KB |
testcase_34 | AC | 9 ms
7,424 KB |
testcase_35 | AC | 29 ms
17,536 KB |
testcase_36 | AC | 24 ms
15,232 KB |
testcase_37 | AC | 8 ms
7,680 KB |
testcase_38 | AC | 21 ms
13,184 KB |
testcase_39 | AC | 5 ms
5,248 KB |
testcase_40 | AC | 13 ms
9,472 KB |
ソースコード
#include "bits/stdc++.h" #include <random> #include <chrono> #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #define ALL(x) (x).begin(), (x).end() #define RALL(x) (x).rbegin(), (x).rend() #define SZ(x) ((lint)(x).size()) #define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i) #define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i) #define REP(i, n) FOR(i,0,n) #define IREP(i, n) IFOR(i,0,n) #define endk '\n' using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef long double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld; struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_; template<class T> auto add = [](T a, T b) -> T { return a + b; }; template<class T> auto mul = [](T a, T b) -> T { return a * b; }; template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); }; template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); }; template<class T> using V = vector<T>; using Vl = V<lint>; using VVl = V<Vl>; template< typename T > ostream& operator<<(ostream& os, const vector< T >& v) { for (int i = 0; i < (int)v.size(); i++) os << v[i] << (i + 1 != v.size() ? " " : ""); return os; } template< typename T >istream& operator>>(istream& is, vector< T >& v) { for (T& in : v) is >> in; return is; } template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; } template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; } template <class T> T div_floor(T a, T b) { if (b < 0) a *= -1, b *= -1; return a >= 0 ? a / b : (a + 1) / b - 1; } template <class T> T div_ceil(T a, T b) { if (b < 0) a *= -1, b *= -1; return a > 0 ? (a - 1) / b + 1 : a / b; } template <class F> struct rec { F f; rec(F&& f_) : f(std::forward<F>(f_)) {} template <class... Args> auto operator()(Args &&... args) const { return f(*this, std::forward<Args>(args)...); } }; lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); } lint digit(lint a) { return (lint)log10(a); } lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); } lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); } bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); } const lint MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 2e9; lint dx[8] = { 0, -1, 0, 1, 1, -1, 1, -1 }, dy[8] = { -1, 0, 1, 0, -1, -1, 1, 1 }; bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; } struct Edge { lint from, to; lint cost; Edge() { } Edge(lint u, lint v, lint c) { cost = c; from = u; to = v; } bool operator<(const Edge& e) const { return cost < e.cost; } }; struct WeightedEdge { lint to; lint cost; WeightedEdge(lint v, lint c = 1) { to = v; cost = c; } bool operator<(const WeightedEdge& e) const { return cost < e.cost; } }; using WeightedGraph = V<V<WeightedEdge>>; typedef pair<plint, lint> tlint; typedef pair<tlint, plint> qlint; typedef pair<string, lint> valstr; typedef pair<Vl, lint> valv; template <std::int_fast64_t Modulus> class modint { using u64 = std::int_fast64_t; public: u64 a; constexpr modint(const u64 x = 0) noexcept : a(x% Modulus) {} constexpr u64& value() noexcept { return a; } constexpr const u64& value() const noexcept { return a; } constexpr modint operator+(const modint rhs) const noexcept { return modint(*this) += rhs; } constexpr modint operator-(const modint rhs) const noexcept { return modint(*this) -= rhs; } constexpr modint operator*(const modint rhs) const noexcept { return modint(*this) *= rhs; } constexpr modint operator/(const modint rhs) const noexcept { return modint(*this) /= rhs; } constexpr modint& operator+=(const modint rhs) noexcept { a += rhs.a; if (a >= Modulus) { a -= Modulus; } return *this; } constexpr modint& operator-=(const modint rhs) noexcept { if (a < rhs.a) { a += Modulus; } a -= rhs.a; return *this; } constexpr modint& operator*=(const modint rhs) noexcept { a = a * rhs.a % Modulus; return *this; } constexpr modint& operator/=(modint rhs) noexcept { u64 exp = Modulus - 2; while (exp) { if (exp % 2) { *this *= rhs; } rhs *= rhs; exp /= 2; } return *this; } }; typedef modint<MOD998244353> ModInt; ModInt mod_pow(ModInt x, lint n) { ModInt ret = 1; while (n > 0) { if (n & 1) (ret *= x); (x *= x); n >>= 1; } return ret; } ModInt func[200000]; void funcinit(int N) { func[0] = 1; for (int i = 1; i <= N; i++) { func[i] = func[i - 1] * i; } } ModInt comb(ModInt n, ModInt r) { if (n.a <= 0 || n.a < r.a) { return 1; } return func[n.a] / (func[r.a] * func[(n - r).a]); } int main() { lint N; string s; cin >> N >> s; V<V<V<ModInt>>> dp(N + 1, V<V<ModInt>>(2, V<ModInt>(2))); dp[0][0][0] = 1; REP(i, N) { lint d = s[i] - 'a'; if (d == 0) { dp[i + 1][0][1] += dp[i][0][0]; dp[i + 1][1][1] += dp[i][1][0]; dp[i + 1][1][0] += dp[i][0][0] * d; dp[i + 1][1][0] += dp[i][1][0] * 25; dp[i + 1][1][1] += dp[i][1][1] * 25; } else { dp[i + 1][0][0] += dp[i][0][0]; //dを使う dp[i + 1][0][1] += dp[i][0][1]; //dを使う dp[i + 1][1][1] += dp[i][0][0]; //aを使う dp[i + 1][1][1] += dp[i][1][0]; //aを使う dp[i + 1][1][0] += dp[i][0][0] * (d - 1); dp[i + 1][1][1] += dp[i][0][1] * (d - 1); dp[i + 1][1][0] += dp[i][1][0] * 25; dp[i + 1][1][1] += dp[i][1][1] * 25; } } cout << dp[N][1][1].a << endk; }