S, T, c = input().split()
S = int(S)
T = int(T)
c = str(c)
F = 0

if (c == "<") and (S<T):
    F = 1
if (c == ">") and (S>T):
    F = 1
if (c == "=") and (S==T):
    F = 1

if F == 1:
    print("YES")
else:
    print("NO")