题目:原题链接(困难)
标签:数组、排序
解法 | 时间复杂度 | 空间复杂度 | 执行用时 |
---|---|---|---|
Ans 1 (Python) | O ( N l o g N ) O(NlogN) O(NlogN) | O ( N ) O(N) O(N) | 100ms (37.20%) |
Ans 2 (Python) | |||
Ans 3 (Python) |
解法一:
class Solution:
def maxChunksToSorted(self, arr1: List[int]) -> int:
arr2 = list(arr1)
arr2.sort()
ans = 0
count = collections.Counter()
for i in range(len(arr1)):
if arr1[i] != arr2[i]:
count[arr1[i]] += 1
count[arr2[i]] -= 1
if count[arr1[i]] == 0:
count.pop(arr1[i])
if count[arr2[i]] == 0:
count.pop(arr2[i])
if len(count) == 0:
ans += 1
return ans