結果
問題 | No.2717 Sum of Subarray of Subsequence |
ユーザー | ゆにぽけ |
提出日時 | 2024-04-05 22:24:50 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 25 ms / 2,000 ms |
コード長 | 4,108 bytes |
コンパイル時間 | 1,242 ms |
コンパイル使用メモリ | 132,508 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-10-01 02:36:56 |
合計ジャッジ時間 | 2,748 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 1 ms
6,820 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,820 KB |
testcase_03 | AC | 2 ms
6,820 KB |
testcase_04 | AC | 1 ms
6,816 KB |
testcase_05 | AC | 2 ms
6,816 KB |
testcase_06 | AC | 1 ms
6,816 KB |
testcase_07 | AC | 2 ms
6,820 KB |
testcase_08 | AC | 1 ms
6,820 KB |
testcase_09 | AC | 24 ms
6,820 KB |
testcase_10 | AC | 25 ms
6,820 KB |
testcase_11 | AC | 24 ms
6,816 KB |
testcase_12 | AC | 24 ms
6,820 KB |
testcase_13 | AC | 24 ms
6,816 KB |
testcase_14 | AC | 24 ms
6,820 KB |
testcase_15 | AC | 24 ms
6,816 KB |
testcase_16 | AC | 24 ms
6,820 KB |
testcase_17 | AC | 25 ms
6,820 KB |
testcase_18 | AC | 25 ms
6,820 KB |
testcase_19 | AC | 24 ms
6,816 KB |
testcase_20 | AC | 1 ms
6,820 KB |
testcase_21 | AC | 2 ms
6,816 KB |
testcase_22 | AC | 23 ms
6,820 KB |
testcase_23 | AC | 13 ms
6,820 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; } static constexpr int get_mod() noexcept {return m;} static constexpr int primitive_root() noexcept { assert(m == 998244353); return 3; } 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() { //[l = 0 -> i,r = 0 -> N - i - 1](r + 1) * (l + 1) int N; cin >> N; mint ans = 0; vector<mint> t(N + 1); t[0] = 1; for(int i = 1;i <= N;i++) { t[i] = t[i - 1] * 2; } for(int i = 0;i < N;i++) { int a; cin >> a; mint cnt = 0; mint L = t[i]; if(i > 0) { L += i * t[i - 1]; } mint R = t[N - i - 1]; if(i + 1 < N) { R += (N - i - 1) * t[N - i - 2]; } cnt += L * R; //C(i,l) = 2^i //C(i,l) * l = i ! / (l - 1) ! (i - l) ! = i * C(i - 1,l) ans += a * cnt; } cout << ans << "\n"; } int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int tt = 1; /* cin >> tt; */ while(tt--) Main(); }