tmp = list(input().split())
s, t = map(int, tmp[:2])
c = tmp[-1]

yes = False
if c == "=" and s == t:
    yes = True
if c == ">" and s > t:
    yes = True
if c == "<" and s < t:
    yes = True

if yes:
    print("YES")
else:
    print("NO")