結果
問題 | No.2717 Sum of Subarray of Subsequence |
ユーザー | Today03 |
提出日時 | 2024-04-05 22:38:42 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 149 ms / 2,000 ms |
コード長 | 3,381 bytes |
コンパイル時間 | 1,901 ms |
コンパイル使用メモリ | 204,032 KB |
実行使用メモリ | 9,600 KB |
最終ジャッジ日時 | 2024-10-01 02:47:16 |
合計ジャッジ時間 | 4,512 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 1 ms
5,248 KB |
testcase_03 | AC | 1 ms
5,248 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 | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 149 ms
9,472 KB |
testcase_10 | AC | 131 ms
9,472 KB |
testcase_11 | AC | 139 ms
9,600 KB |
testcase_12 | AC | 132 ms
9,472 KB |
testcase_13 | AC | 131 ms
9,600 KB |
testcase_14 | AC | 129 ms
9,472 KB |
testcase_15 | AC | 129 ms
9,472 KB |
testcase_16 | AC | 132 ms
9,600 KB |
testcase_17 | AC | 130 ms
9,472 KB |
testcase_18 | AC | 129 ms
9,472 KB |
testcase_19 | AC | 129 ms
9,472 KB |
testcase_20 | AC | 2 ms
5,248 KB |
testcase_21 | AC | 2 ms
5,248 KB |
testcase_22 | AC | 131 ms
9,472 KB |
testcase_23 | AC | 88 ms
9,600 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; const int INF = 1e9 + 10; const ll INFL = 4e18; template <ll MOD> struct modint { ll value; modint(ll x = 0) { if (x >= 0) { value = x % MOD; } else { value = MOD - (-x) % MOD; } } modint operator-() const { return modint(-value); } modint operator+() const { return modint(*this); } modint &operator+=(const modint &other) { value += other.value; if (value >= MOD) { value -= MOD; } return *this; } modint &operator-=(const modint &other) { value += MOD - other.value; if (value >= MOD) { value -= MOD; } return *this; } modint &operator*=(const modint other) { value = value * other.value % MOD; return *this; } modint &operator/=(modint other) { (*this) *= other.inv(); return *this; } modint operator+(const modint &other) const { return modint(*this) += other; } modint operator-(const modint &other) const { return modint(*this) -= other; } modint operator*(const modint &other) const { return modint(*this) *= other; } modint operator/(const modint &other) const { return modint(*this) /= other; } modint pow(ll x) const { modint ret(1), mul(value); while (x) { if (x & 1) { ret *= mul; } mul *= mul; x >>= 1; } return ret; } modint inv() const { return pow(MOD - 2); } bool operator==(const modint &other) const { return value == other.value; } bool operator!=(const modint &other) const { return value != other.value; } friend ostream &operator<<(ostream &os, const modint &x) { return os << x.value; } friend istream &operator>>(istream &is, modint &x) { ll v; is >> v; x = modint<MOD>(v); return is; } }; using mod998 = modint<998244353>; using mod107 = modint<1000000007>; template <typename T> struct combination { vector<T> fact, factinv; combination(int n) { fact = vector<T>(n + 1); factinv = vector<T>(n + 1); fact[0] = 1; for (int i = 1; i <= n; i++) { fact[i] = fact[i - 1] * i; } for (int i = 0; i <= n; i++) { factinv[i] = fact[i].inv(); } } T nCr(ll n, ll r) { if (n < 0 || r < 0 || n - r < 0) { return 0; } return fact[n] * factinv[r] * factinv[n - r]; } T nPr(ll n, ll r) { if (n < 0 || r < 0 || n - r < 0) { return 0; } return fact[n] * factinv[n - r]; } }; using mint = mod998; int main() { int N; cin >> N; vector<mint> A(N); for (int i = 0; i < N; i++) { cin >> A[i]; } combination<mint> C(N); auto F = [&](int n) { if (n == 0) { return mint(1); } return mint(2).pow(n - 1) * (n + 2); }; vector<mint> cnt(N); for (int i = 0; i < N; i++) { cnt[i] = F(N - i - 1) * F(i); } mint ans = 0; for (int i = 0; i < N; i++) { ans += cnt[i] * A[i]; } cout << ans << endl; }