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