T, A, B = map(int, input().split())
if T == 1 and A+B>0:
    print('NO')
    exit()
elif A <= T and B <= T:
    print('YES')
else:
    print('NO')
    exit()

x = 0
y = 0
t = 0

while t < T:
    dy = A - y
    dx = B - x
    dt = T - t

    t += 1
    s = ''

    if dy > 0 or (dy == 0 and (dy - dt) % 2 == 0):
        s += '^'
        y += 1
    elif dy < 0:
        s += 'v'
        y -= 1

    if dx > 0 or (dx == 0 and (dx - dt) % 2 == 0):
        s += '>'
        x += 1
    elif dx < 0:
        s += '<'
        x -= 1

    if s == '':
        s += '>'
        x += 1

    print(s)