struct

AtCoder::ModInt998244353

Inherits Struct / Value / Object

Implements atcoder::modint998244353_i64.

alias Mint = AtCoder::ModInt998244353
Mint.new(30_i64) // Mint.new(7_i64)

Constants

M = 998244353_u32

M2 = 932051910_u32

MOD = 998244353_i64

MR = 998244351_u32

R = 3296722945_u32

Constructors

new(value : Int)

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new

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Class methods

combination(n, k)

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factorial(n)

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permutation(n, k)

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raw(mgy : UInt32)

Initialize using montgomery representation

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repeated_combination(n, k)

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zero

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Instance methods

*(value : self)

*(value)

**(value)

+(value : self)

+(value)

-(value : self)

-(value)

/(value : self)

/(value)

//(value)

<(value)

<<(value)

<=(value)

==(other : self)

==(other)

Returns true if this struct is equal to other.

Both structs' instance vars are compared to each other. Thus, two structs are considered equal if each of their instance variables are equal. Subclasses should override this method to provide specific equality semantics.

struct Point
  def initialize(@x : Int32, @y : Int32)
  end
end

p1 = Point.new 1, 2
p2 = Point.new 1, 2
p3 = Point.new 3, 4

p1 == p2 # => true
p1 == p3 # => false

>(value)

>=(value)

abs

clone

inspect(io : IO)

Appends this struct's name and instance variables names and values to the given IO.

struct Point
  def initialize(@x : Int32, @y : Int32)
  end
end

p1 = Point.new 1, 2
p1.to_s    # "Point(@x=1, @y=2)"
p1.inspect # "Point(@x=1, @y=2)"

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inv

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mgy

mgy=(v : UInt32)

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pow(value)

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pred

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reduce(b : UInt64) : UInt32

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