task_1.1.rb

def main(arr,x)
    total = 0
    cur = 0
    arr = arr.split(',')
    n = arr.length
    arr.each do |a|
        total+=1 if a == x
    end
    if total == 0
        return -1
    elsif n != total
        os = n
        for i in 0...n
                os-=1
                cur +=1 if arr[i] == x
                if os - (total-cur)==cur
                        answer = i+1
                        puts "Answer: #{answer}"
                end
        end
    elsif n == total
        puts "All the same"
    end
end
puts "Enter numbers separated by commas and press 'Enter'"
array = gets.chomp
puts "Enter X:"
x_gets = gets.chomp
main(array,x_gets)