【英文题目】(学习英语的同时,更能理解题意哟~)
We define a harmonious array is an array where the difference between its maximum value and its minimum value is exactly 1.
Now, given an integer array, you need to find the length of its longest harmonious subsequence among all its possible subsequences.
Example 1:
Input: [1,3,2,2,5,2,3,7]
Output: 5
Explanation: The longest harmonious subsequence is [3,2,2,2,3].
Note: The length of the input array will not exceed 20,000.
【中文题目】
和谐数组是指一个数组里元素的最大值和最小值之间的差别正好是1。
现在,给定一个整数数组,你需要在所有可能的子序列中找到最长的和谐子序列的长度。
示例 1:
输入: [1,3,2,2,5,2,3,7]
输出: 5
原因: 最长的和谐数组是:[3,2,2,2,3].
说明: 输入的数组长度最大不超过20,000.
【思路】
对所有元素进行计数,对大小相邻的元素其计数进行求和,取得最大值。
【代码】
python版本
class Solution(object):
def findLHS(self, nums):
"""
:type nums: List[int]
:rtype: int
"""
min0 = sys.maxsize
max0 = -sys.maxsize
d = {}
for n in nums:
d[n] = d.get(n, ) +
min0 = min(min0, n)
max0 = max(max0, n)
res =
for i in d.keys():
if i+ in d:
res = max(res, d[i] + d[i+])
return res