s,t,c = input().split()
s,t = int(s),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")