thelist = [1,2,3,4,5,6,7,8,9,8,7,7,6,5,3,2,1,0]
thelist.insert(0, len(thelist))
datasize = thelist[0]
i=j=1;
while j <= (datasize-1):
	if thelist[j] == thelist[j+1]:
            j+=1
            continue
	if i==j:
            i+=1
            j+=1
            continue
	thelist[i]=thelist[j]
	i+=1
        j+=1