s,t,c = input().split()
a = 1
if int(s) == int(t):
    if c == "=":
        a = 0
elif int(s) > int(t):
    if c == ">":
        a = 0
else:
    if c == "<":
        a = 0
if a == 0:
    print("YES")
else:
    print("NO")