s,t,c = input().split()
s = int(s)
t = int(t)
if c == '<':
    if s < t:
        print('YES')
    else:
        print('NO')
elif c == '>':
    if s > t:
        print('YES')
    else:
        print('NO')
else:
    if s == t:
        print('YES')
    else:
        print('NO')