s,t,c=map(str,input().split())
s=int(s)
t=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")