python leetcode
求两个数组的交集350. Intersection of Two Arrays II
Given two arrays, write a function to compute their intersection.
Example:
Given nums1 = [1, 2, 2, 1]
, nums2 = [2,
2]
, return [2, 2]
.
Note:
- Each element in the result should appear as many times as it shows in both arrays.
- The result can be in any order.
class Solution(object):
def intersect(self, nums1, nums2):
"""
:type nums1: List[int]
:type nums2: List[int]
:rtype: List[int]
"""
from collections import Counter
c1=Counter(nums1)
c2=Counter(nums2)
c=c1&c2
return list(c.elements())
def intersect1(self, nums1, nums2):
"""
:type nums1: List[int]
:type nums2: List[int]
:rtype: List[int]
"""
nums1 = sorted(nums1)
nums2 = sorted(nums2)
res = []
i = 0;
j = 0
while i < len(nums1) and j < len(nums2):
if nums1[i] == nums2[j]:
res.append(nums1[i])
i += 1
j += 1
elif nums1[i] < nums2[j]:
i += 1
else:
j += 1
return res
S=Solution()
print S.intersect([1,2,2,1],[1])