1622.rb

def get_patterns(number, operators)
  numbers = number.split ''
  size = numbers.size
  p operators
    .repeated_permutation(size - 1)
    .map { |operators_combination|
      numbers.map.with_index {|num, index| "#{num}#{operators_combination[index]}"}
    }
    .map { |item| eval item.join('').gsub(/^0/, '')}
end

def divisible_by?(number, operandos)
  not operandos
    .select { |operando| number % operando == 0 }
    .empty?
end

def solve

  raw_list = []
  while str = STDIN.gets#.chomp
    break if str.empty?
    raw_list.push str.chomp
  end

  one_column_primes = [2, 3, 5, 7]
  operators = ['', '+', '-']

  raw_list.each { |num|
    p get_patterns(num, operators)
      .select {|pattern| not pattern.nil? and pattern > 0}
      .select {|pattern| divisible_by? pattern, one_column_primes}
      .size
  }
end

solve