A,B=input().split()
A=list(map(int,list(A)))[::-1]
B=list(map(int,list(B)))[::-1]
while len(A)<len(B):
    A.append(0)
while len(A)>len(B):
    B.append(0)
if all(a>=b for a,b in zip(A,B)):
    ans="Yes"
else:
    ans="No"
print(ans)