S, T, c = input().split()
S = int(S)
T = int(T)

if S < T:
    if c == "<":
        print("YES")
    else:
        print("NO") 
elif S > T:
    if c == ">":
        print("YES")
    else:
        print("NO") 
elif S == T:
    if c == "=":
        print("YES")
    else:
        print("NO") 
else:
    print("NO")