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)