题目
intput=【1,1,2】
output = 【1,2,X】
思路
双指针
代码
def removeDuplicates(list1):
tail = 0
for i in range(1,len(list1)):
if list1[tail] != list1[i]:
tail += 1
list1[tail] = list1[i]
tail = tail +1
while tail<len(list1):
list1[tail] = 'X'
tail +=1
return list1
#A = [0,0,1,1,1,2,2,3,3,4]
A = [1,1,2]
a = removeDuplicates(A)
print(a)