結果
問題 | No.1299 Random Array Score |
ユーザー |
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提出日時 | 2020-11-28 15:46:39 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 28 ms / 2,000 ms |
コード長 | 3,214 bytes |
コンパイル時間 | 1,067 ms |
コンパイル使用メモリ | 73,812 KB |
最終ジャッジ日時 | 2025-01-16 09:23:52 |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 34 |
ソースコード
#include <iostream> #include <vector> #include <algorithm> #include <string> #include <numeric> #include <utility> #include <tuple> #define rep(i, a, b) for (int i = int(a); i < int(b); i++) using namespace std; using ll = long long int; using P = pair<ll, ll>; // clang-format off #ifdef _DEBUG_ #define dump(...) do{ cerr << __LINE__ << ":\t" << #__VA_ARGS__ << " = "; PPPPP(__VA_ARGS__); cerr << endl; } while(false) template<typename T> void PPPPP(T t) { cerr << t; } template<typename T, typename... S> void PPPPP(T t, S... s) { cerr << t << ", "; PPPPP(s...); } #else #define dump(...) do{ } while(false) #endif template<typename T> vector<T> make_v(size_t a, T b) { return vector<T>(a, b); } template<typename... Ts> auto make_v(size_t a, Ts... ts) { return vector<decltype(make_v(ts...))>(a, make_v(ts...)); } template<typename T> bool chmin(T &a, T b) { if (a > b) {a = b; return true; } return false; } template<typename T> bool chmax(T &a, T b) { if (a < b) {a = b; return true; } return false; } template<typename T> void print(T a) { cout << a << '\n'; } template<typename T, typename... Ts> void print(T a, Ts... ts) { cout << a << ' '; print(ts...); } template<typename T> istream &operator,(istream &in, T &t) { return in >> t; } // clang-format on template<ll MOD = 1000000007> class ModInt { ll n; ModInt constexpr inverse() const { return ModInt::pow(*this, MOD - 2); } public: ModInt() : n(0) {} ModInt(ll _n) : n(((_n % MOD) + MOD) % MOD) {} ModInt operator+=(const ModInt &m) { n += m.n; if (n >= MOD) n -= MOD; return *this; } ModInt operator-=(const ModInt &m) { n -= m.n; if (n < 0) n += MOD; return *this; } ModInt operator*=(const ModInt &m) { n *= m.n; if (n >= MOD) n %= MOD; return *this; } ModInt operator/=(const ModInt &m) { (*this) *= m.inverse(); return *this; } friend ModInt operator+(ModInt t, const ModInt &m) { return t += m; } friend ModInt operator-(ModInt t, const ModInt &m) { return t -= m; } friend ModInt operator*(ModInt t, const ModInt &m) { return t *= m; } friend ModInt operator/(ModInt t, const ModInt &m) { return t /= m; } ModInt operator=(const ll l) { n = l % MOD; if (n < 0) n += MOD; return *this; } friend ostream &operator<<(ostream &out, const ModInt &m) { out << m.n; return out; } friend istream &operator>>(istream &in, ModInt &m) { ll l; in >> l; m = l; return in; } static constexpr ModInt pow(const ModInt x, ll p) { ModInt<MOD> ans = 1; for (ModInt<MOD> m = x; p > 0; p /= 2, m *= m) { if (p % 2) ans *= m; } return ans; } }; using mint = ModInt<998244353>; mint operator"" _m(unsigned long long m) { return mint(m); } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); ll n, k; cin, n, k; ll sum = 0; rep(i, 0, n) { ll a; cin, a; sum += a; } print(1_m * mint::pow(2, k) * sum); return 0; }