s,t,c = map(str,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")