T, A, B = map(int,raw_input().split(" "))
slant = min(A,B)
short = slant + abs(A-B)
if short > T:
	print "NO"
else:
	print "YES"
	for i in range(slant-1):
		print ">^"
	if short != slant:
		d = "^" if A > B else ">"
		for i in range(short-slant):
			print d
	exc = T - short
	for i in range(exc/2):
		print "^"
		print "v"
	if exc % 2 == 0:
		print ">^" 
	else:
		print ">"
		print "^"