結果
問題 | No.2111 Sum of Diff |
ユーザー | snow39 |
提出日時 | 2022-10-28 21:38:00 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 28 ms / 2,000 ms |
コード長 | 3,259 bytes |
コンパイル時間 | 1,104 ms |
コンパイル使用メモリ | 107,272 KB |
実行使用メモリ | 6,400 KB |
最終ジャッジ日時 | 2024-07-06 00:43:21 |
合計ジャッジ時間 | 2,371 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 20 |
ソースコード
#include <algorithm> #include <cmath> #include <iomanip> #include <iostream> #include <map> #include <queue> #include <set> #include <string> #include <tuple> #include <vector> #define mkp make_pair #define mkt make_tuple #define rep(i, n) for (int i = 0; i < (int)(n); ++i) #define all(v) v.begin(), v.end() using namespace std; typedef long long ll; const ll MOD = 1e9 + 7; // const ll MOD = 998244353; template <class T> void chmin(T& a, const T& b) { if (a > b) a = b; } template <class T> void chmax(T& a, const T& b) { if (a < b) a = b; } template <long long mod> class modint { private: using T = long long; T a; public: constexpr modint(const long long x = 0) noexcept : a((x % mod + mod) % mod) {} constexpr T& value() noexcept { return a; } constexpr const T& value() const noexcept { return a; } constexpr modint operator-() const noexcept { return modint(0) -= *this; } 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 >= mod) a -= mod; return *this; } constexpr modint& operator-=(const modint& rhs) noexcept { if (a < rhs.a) a += mod; a -= rhs.a; return *this; } constexpr modint& operator*=(const modint& rhs) noexcept { a = a * rhs.a % mod; return *this; } constexpr modint& operator/=(const modint& rhs) noexcept { return *this *= rhs.inv(); } constexpr bool operator==(const modint& rhs) const noexcept { return a == rhs.a; } constexpr bool operator!=(const modint& rhs) const noexcept { return not(*this == rhs); } constexpr modint pow(long long k) const noexcept { modint ret(1); modint x = k > 0 ? *this : this->inv(); k = abs(k); while (k > 0) { if (k & 1) ret *= x; x *= x; k >>= 1; } return ret; } constexpr modint inv() const noexcept { return pow(mod - 2); } friend std::ostream& operator<<(std::ostream& os, const modint& X) noexcept { return os << X.a; } friend std::istream& operator>>(std::istream& is, modint& X) noexcept { is >> X.a; X.a %= mod; if (X.a < 0) X.a += mod; return is; } }; using mint = modint<998244353>; void solve() { int N; cin >> N; vector<mint> A(N); rep(i, N) cin >> A[i]; vector<mint> two(N + 1); two[0] = 1; rep(i, N) two[i + 1] = two[i] * 2; mint ans = 0; rep(i, N - 1) { ans += A[i] * (two[N - i - 1] - 1); } for (int i = 1; i < N; i++) { ans -= A[i] * (two[i] - 1); } cout << ans << endl; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); solve(); return 0; }