难度：
1. Description
172. Remove Element
2. Solution
- python
用list的remove函数
class Solution:
"""
@param: A: A list of integers
@param: elem: An integer
@return: The new length after remove
"""
def removeElement(self, A, elem):
# write your code here
for i in range(A.count(elem)):
A.remove(elem)
return len(A)
不用list的remove函数
class Solution:
"""
@param: A: A list of integers
@param: elem: An integer
@return: The new length after remove
"""
def removeElement(self, A, elem):
# write your code here
j = len(A)-1
for i in range(len(A)-1, -1, -1):
if A[i] == elem:
A[j], A[i] = A[i], A[j]
j -= 1
return j+1
