A,B=input().split()
if len(A)>len(B):
    B=("0"*len(A)+B)[-len(A):]
else:
    A=("0"*len(B)+A)[-len(B):]
ok=1
for a,b in zip(A,B):
    if int(a)<int(b):
        ok=0
        break
if ok:print("Yes")
else:print("No")