結果
| 問題 | No.1299 Random Array Score | 
| コンテスト | |
| ユーザー |  | 
| 提出日時 | 2020-11-27 21:41:10 | 
| 言語 | PyPy3 (7.3.15) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 109 ms / 2,000 ms | 
| コード長 | 1,622 bytes | 
| コンパイル時間 | 285 ms | 
| コンパイル使用メモリ | 82,352 KB | 
| 実行使用メモリ | 107,392 KB | 
| 最終ジャッジ日時 | 2024-07-26 12:02:11 | 
| 合計ジャッジ時間 | 4,593 ms | 
| ジャッジサーバーID (参考情報) | judge2 / judge3 | 
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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
MOD = 998244353
class ModInt:
  def __init__(self, x):
    self.x = x % MOD
  def __str__(self):
    return str(self.x)
  __repr__ = __str__
  def __add__(self, other):
    return (
      ModInt(self.x + other.x) if isinstance(other, ModInt) else
      ModInt(self.x + other)
    )
  def __sub__(self, other):
    return (
      ModInt(self.x - other.x) if isinstance(other, ModInt) else
      ModInt(self.x - other)
    )
  def __mul__(self, other):
    return (
      ModInt(self.x * other.x) if isinstance(other, ModInt) else
      ModInt(self.x * other)
    )
  def __truediv__(self, other):
    return (
      ModInt(
        self.x * pow(other.x, MOD - 2, MOD)
      ) if isinstance(other, ModInt) else
      ModInt(self.x * pow(other, MOD - 2, MOD))
    )
  __floordiv__ = __truediv__
  def __pow__(self, other):
    return (
      ModInt(pow(self.x, other.x, MOD)) if isinstance(other, ModInt) else
      ModInt(pow(self.x, other, MOD))
    )
  __radd__ = __add__
  def __rsub__(self, other):
    return (
      ModInt(other.x - self.x) if isinstance(other, ModInt) else
      ModInt(other - self.x)
    )
  __rmul__ = __mul__
  def __rtruediv__(self, other):
    return (
      ModInt(
        other.x * pow(self.x, MOD - 2, MOD)
      ) if isinstance(other, ModInt) else
      ModInt(other * pow(self.x, MOD - 2, MOD))
    )
  def __rpow__(self, other):
    return (
      ModInt(pow(other.x, self.x, MOD)) if isinstance(other, ModInt) else
      ModInt(pow(other, self.x, MOD))
    )
N, K = map(int, input().split())
A = list(map(int, input().split()))
S = ModInt(sum(A))
print(S*pow(ModInt(2),K))
            
            
            
        