b = [int(i) for i in input().split()]
if len(b)==2 and b[0]!=0 and b[1]==0:
print (0)
if sum(b)==0:
print(0)
else:
for i in range(0,len(b)-2):
if b[0]!=0:
if b[i]==0:
del (b[i-1])
i+=1
if b[0]==0:
b= b[1:]
print(*b)