func main()
	var _: [][]char :: cui@input().split(" ")
	var T: int :: _[0].toInt(&)
	var A: int :: _[1].toInt(&)
	var B: int :: _[2].toInt(&)
	var ans: bool :: true
	if(A.abs() > T | B.abs() > T)
		do ans :: false
	end if
	if(T = 1 & A = 0 & B = 0)
		do ans :: false
	end if
	if(!ans)
		do cui@print("NO\n")
		ret
	end if
	do cui@print("YES\n")
	var x: int
	var y: int
	for t(1, T)
		if(t = 1 & (T - A) % 2 <> 0)
			do y :+ moveY(B - y > 0 ?(1, -1))
			do cui@print("\n")
			skip t
		end if
		if(t = T & (T - B) % 2 <> 0)
			do x :+ moveX(A - x > 0 ?(1, -1))
			do cui@print("\n")
			skip t
		end if
		do x :+ moveX(A - x > 0 ?(1, -1))
		do y :+ moveY(B - y > 0 ?(1, -1))
		do cui@print("\n")
	end for
	func moveY(dy: int): int
		do cui@print(dy = 1 ?("^", "v"))
		ret dy
	end func
	func moveX(dx: int): int
		do cui@print(dx = 1 ?(">", "<"))
		ret dx
	end func
end func