結果

問題 No.1299 Random Array Score
ユーザー hakatashihakatashi
提出日時 2020-11-27 21:54:23
言語 Crystal
(1.11.2)
結果
AC  
実行時間 35 ms / 2,000 ms
コード長 5,710 bytes
コンパイル時間 11,228 ms
コンパイル使用メモリ 295,332 KB
実行使用メモリ 21,820 KB
最終ジャッジ日時 2024-06-30 21:43:38
合計ジャッジ時間 13,469 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge1
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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 3 ms
6,816 KB
testcase_01 AC 3 ms
6,944 KB
testcase_02 AC 3 ms
6,940 KB
testcase_03 AC 32 ms
17,896 KB
testcase_04 AC 31 ms
17,024 KB
testcase_05 AC 24 ms
14,976 KB
testcase_06 AC 23 ms
14,860 KB
testcase_07 AC 23 ms
14,864 KB
testcase_08 AC 31 ms
17,108 KB
testcase_09 AC 4 ms
6,940 KB
testcase_10 AC 14 ms
9,344 KB
testcase_11 AC 6 ms
6,940 KB
testcase_12 AC 21 ms
14,620 KB
testcase_13 AC 31 ms
17,152 KB
testcase_14 AC 22 ms
14,768 KB
testcase_15 AC 22 ms
14,748 KB
testcase_16 AC 22 ms
14,888 KB
testcase_17 AC 7 ms
6,940 KB
testcase_18 AC 15 ms
9,600 KB
testcase_19 AC 17 ms
10,752 KB
testcase_20 AC 11 ms
8,064 KB
testcase_21 AC 4 ms
6,940 KB
testcase_22 AC 8 ms
6,944 KB
testcase_23 AC 22 ms
14,864 KB
testcase_24 AC 24 ms
14,988 KB
testcase_25 AC 22 ms
14,864 KB
testcase_26 AC 3 ms
6,940 KB
testcase_27 AC 8 ms
6,940 KB
testcase_28 AC 7 ms
6,940 KB
testcase_29 AC 9 ms
7,168 KB
testcase_30 AC 21 ms
14,100 KB
testcase_31 AC 10 ms
7,168 KB
testcase_32 AC 30 ms
16,928 KB
testcase_33 AC 35 ms
21,820 KB
testcase_34 AC 22 ms
12,708 KB
testcase_35 AC 34 ms
21,684 KB
testcase_36 AC 22 ms
12,580 KB
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ソースコード

diff # 

lib C;fun strtoll(s: UInt8*,p: UInt8**,b: Int32): Int64;end
class String;def to_i64;C.strtoll(self,nil,10);end;end

# ac-library.cr by hakatashi https://github.com/google/ac-library.cr
#
# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

module AtCoder
  macro static_modint(name, modulo)
    module AtCoder
      record {{name}}, value : Int64 do
        @@factorials = Array(self).new(100_000_i64) # Change here to improve performance
        MOD = {{modulo}}

        def self.factorial(n)
          if @@factorials.empty?
            @@factorials << self.new(1_i64)
          end
          @@factorials.size.upto(n) do |i|
            @@factorials << @@factorials.last * i
          end
          @@factorials[n]
        end

        def self.permutation(n, k)
          raise ArgumentError.new("k cannot be greater than n") unless n >= k
          factorial(n) // factorial(n - k)
        end

        def self.combination(n, k)
          raise ArgumentError.new("k cannot be greater than n") unless n >= k
          permutation(n, k) // @@factorials[k]
        end

        def self.repeated_combination(n, k)
          combination(n + k - 1, k)
        end

        def self.extended_gcd(a, b)
          last_remainder, remainder = a.abs, b.abs
          x, last_x, y, last_y = 0_i64, 1_i64, 1_i64, 0_i64
          while remainder != 0
            new_last_remainder = remainder
            quotient, remainder = last_remainder.divmod(remainder)
            last_remainder = new_last_remainder
            x, last_x = last_x - quotient * x, x
            y, last_y = last_y - quotient * y, y
          end

          return last_remainder, last_x * (a < 0 ? -1 : 1)
        end

        def self.zero
          self.new(0_i64)
        end

        def inv
          g, x = self.class.extended_gcd(@value, MOD)
          self.class.new(x % MOD)
        end

        def +(value)
          self.class.new((@value + value.to_i64 % MOD) % MOD)
        end

        def -(value)
          self.class.new((@value + MOD - value.to_i64 % MOD) % MOD)
        end

        def *(value)
          self.class.new((@value * value.to_i64 % MOD) % MOD)
        end

        def /(value : self)
          raise DivisionByZeroError.new if value == 0
          self * value.inv
        end

        def /(value)
          raise DivisionByZeroError.new if value == 0
          self * self.class.new(value.to_i64 % MOD).inv
        end

        def //(value)
          self./(value)
        end

        def **(value)
          b = value > 0 ? self : self.inv
          e = value.abs
          ret = self.class.new(1_i64)
          while e > 0
            if e % 2 == 1
              ret *= b
            end
            b *= b
            e //= 2
          end
          ret
        end

        def <<(value)
          self * self.class.new(2_i64) ** value
        end

        def sqrt
          z = self.class.new(1_i64)
          until z ** ((MOD - 1) // 2) == MOD - 1
            z += 1
          end
          q = MOD - 1
          m = 0
          while q % 2 == 0
            q //= 2
            m += 1
          end
          c = z ** q
          t = self ** q
          r = self ** ((q + 1) // 2)
          m.downto(2) do |i|
            tmp = t ** (2 ** (i - 2))
            if tmp != 1
              r *= c
              t *= c ** 2
            end
            c *= c
          end
          if r * r == self
            r.to_i64 * 2 <= MOD ? r : -r
          else
            nil
          end
        end

        def to_i64
          @value
        end

        def ==(value : self)
          @value == value.to_i64
        end

        def ==(value)
          @value == value
        end

        def -
          self.class.new(0_i64) - self
        end

        def +
          self
        end

        def abs
          self
        end

        # ac-library compatibility

        def pow(value)
          self.**(value)
        end
        def val
          self.to_i64
        end

        # ModInt shouldn't be compared

        def <(value)
          raise NotImplementedError.new("<")
        end
        def <=(value)
          raise NotImplementedError.new("<=")
        end
        def <(value)
          raise NotImplementedError.new("<")
        end
        def >=(value)
          raise NotImplementedError.new(">=")
        end

        delegate to_s, to: @value
        delegate inspect, to: @value
      end
    end

    struct Int
      def +(value : AtCoder::{{name}})
        value + self
      end

      def -(value : AtCoder::{{name}})
        -value + self
      end

      def *(value : AtCoder::{{name}})
        value * self
      end

      def //(value : AtCoder::{{name}})
        value.inv * self
      end

      def /(value : AtCoder::{{name}})
        self // value
      end

      def ==(value : AtCoder::{{name}})
        value == self
      end
    end
  end
end

AtCoder.static_modint(ModInt1000000007, 1_000_000_007_i64)
AtCoder.static_modint(ModInt998244353, 998_244_353_i64)

alias Mint = AtCoder::ModInt998244353


n, k = read_line.split.map(&.to_i64)
ais = read_line.split.map {|a| Mint.new(a.to_i64)}

p Mint.new(2_i64) ** k * ais.sum
0