class Yukicoder
  LAST_ONE = %w(x > ^ ^>)

  def initialize
    t, y, x = gets.chomp.split.map(&:to_i)
    m = [y,x].max
    n = [y,x].min

    ty = y-1
    tx = x-1
    tm = [ty,tx].max
    tn = [ty,tx].min

    answer = []

    if m > t
      puts "NO"
      return
    else
      if t == 1
        if y == 0 && x == 0
          puts "NO"
          return
        else
          puts "YES"
          puts LAST_ONE[y*2+x]
          return
        end
      else
        if ty < 0
          if tx == 0
            answer << ['v']
            t -= 1
          elsif tx < 0
            answer << ['<v']
            t -= 1
          else
            answer << ['v>']
            answer << ['>'] * (tx-1)
            t -= tx
          end
        elsif tx < 0
          if ty == 0
            answer << ['<']
            t -= 1
          else
            answer << ['<^']
            answer << ['^'] * (ty-1)
            t -= ty
          end
        elsif ty > tx
          answer << ['^>'] * tx
          answer << ['^'] * (ty-tx)
          t -= ty
        elsif ty < tx
          answer << ['^>'] * ty
          answer << ['>'] * (tx-ty)
          t -= tx
        else
          answer << ['^>'] * ty
          t -= ty
        end

        if t.odd?
          if t > 1
            answer << ['>','<'] * ((t-1)/2)
          end

          answer << '^>'
        else
          if t > 2
            answer << ['>','<'] * ((t-1)/2)
          end

          answer << ['>','^']
        end
      end
    end

    puts "YES"
    puts answer
  end
end

Yukicoder.new