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

S=int(S); T=int(T)
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")