S,T,hi=map(str,input().split())
s=int(S)
t=int(T)
if hi == "<":
    if s < t:
        print("YES")
    else:
        print("NO")
elif hi == ">":
    if s > t:
        print("YES")
    else:
        print("NO")
else:
    if s == t:
        print("YES")
    else:
        print("NO")