A,B = input().split()
A_num = int(A)
B_num = int(B)

A = "0"*max(len(B)-len(A),0) + A
B = "0"*max(len(A)-len(B),0) + B

A = list(map(int,reversed(list(A))))
B = list(map(int,reversed(list(B))))

for a,b in zip(A,B):
    if not(a >= b):
        print("No")
        exit()


print("Yes")