結果
問題 | No.2717 Sum of Subarray of Subsequence |
ユーザー | shinchan |
提出日時 | 2024-04-05 21:43:31 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 152 ms / 2,000 ms |
コード長 | 3,213 bytes |
コンパイル時間 | 2,098 ms |
コンパイル使用メモリ | 204,824 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-10-01 01:58:15 |
合計ジャッジ時間 | 5,312 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
(要ログイン)
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 | 1 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,820 KB |
testcase_03 | AC | 2 ms
6,816 KB |
testcase_04 | AC | 1 ms
6,816 KB |
testcase_05 | AC | 2 ms
6,816 KB |
testcase_06 | AC | 2 ms
6,816 KB |
testcase_07 | AC | 2 ms
6,816 KB |
testcase_08 | AC | 1 ms
6,820 KB |
testcase_09 | AC | 150 ms
6,816 KB |
testcase_10 | AC | 152 ms
6,820 KB |
testcase_11 | AC | 152 ms
6,816 KB |
testcase_12 | AC | 151 ms
6,820 KB |
testcase_13 | AC | 150 ms
6,820 KB |
testcase_14 | AC | 149 ms
6,820 KB |
testcase_15 | AC | 150 ms
6,820 KB |
testcase_16 | AC | 149 ms
6,816 KB |
testcase_17 | AC | 149 ms
6,820 KB |
testcase_18 | AC | 151 ms
6,816 KB |
testcase_19 | AC | 150 ms
6,816 KB |
testcase_20 | AC | 2 ms
6,816 KB |
testcase_21 | AC | 1 ms
6,816 KB |
testcase_22 | AC | 148 ms
6,816 KB |
testcase_23 | AC | 142 ms
6,816 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define all(v) (v).begin(),(v).end() #define pb(a) push_back(a) #define rep(i, n) for(int i=0;i<n;i++) #define foa(e, v) for(auto&& e : v) using ll = long long; const ll MOD7 = 1000000007, MOD998 = 998244353, INF = (1LL << 60); #define dout(a) cout<<fixed<<setprecision(10)<<a<<endl; template<int MOD> struct Modint { long long val; constexpr Modint(long long v = 0) noexcept : val(v % MOD) { if (val < 0) val += MOD; } constexpr int mod() const { return MOD; } constexpr long long value() const { return val; } constexpr Modint operator - () const noexcept { return val ? MOD - val : 0; } constexpr Modint operator + (const Modint& r) const noexcept { return Modint(*this) += r; } constexpr Modint operator - (const Modint& r) const noexcept { return Modint(*this) -= r; } constexpr Modint operator * (const Modint& r) const noexcept { return Modint(*this) *= r; } constexpr Modint operator / (const Modint& r) const noexcept { return Modint(*this) /= r; } constexpr Modint& operator += (const Modint& r) noexcept { val += r.val; if (val >= MOD) val -= MOD; return *this; } constexpr Modint& operator -= (const Modint& r) noexcept { val -= r.val; if (val < 0) val += MOD; return *this; } constexpr Modint& operator *= (const Modint& r) noexcept { val = val * r.val % MOD; return *this; } constexpr Modint& operator /= (const Modint& r) noexcept { long long a = r.val, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b, swap(a, b); u -= t * v, swap(u, v); } val = val * u % MOD; if (val < 0) val += MOD; return *this; } constexpr bool operator == (const Modint& r) const noexcept { return this->val == r.val; } constexpr bool operator != (const Modint& r) const noexcept { return this->val != r.val; } friend constexpr istream& operator >> (istream& is, Modint<MOD>& x) noexcept { is >> x.val; x.val %= MOD; if (x.val < 0) x.val += MOD; return is; } friend constexpr ostream& operator << (ostream& os, const Modint<MOD>& x) noexcept { return os << x.val; } constexpr Modint<MOD> pow(long long n) noexcept { if (n == 0) return 1; if (n < 0) return this->pow(-n).inv(); Modint<MOD> ret = pow(n >> 1); ret *= ret; if (n & 1) ret *= *this; return ret; } constexpr Modint<MOD> inv() noexcept { long long a = this->val, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b, swap(a, b); u -= t * v, swap(u, v); } return Modint<MOD>(u); } }; const int MOD = MOD998; using mint = Modint<MOD>; mint num(int i) { return mint(2).pow(i) + (i == 0 ? mint(0) : mint(i) * mint(2).pow(i - 1)); } int main() { cin.tie(0); ios::sync_with_stdio(false); ll n, a; cin >> n; mint ans = 0; rep(i, n) { cin >> a; ans += mint(a) * num(i) * num(n - i - 1); } cout << ans << endl; return 0; }