Merge pull request #1880 from Renzehua1998/master

Update 763划分字母区间 方法二Python3代码
This commit is contained in:
程序员Carl
2023-02-03 10:53:53 +08:00
committed by GitHub

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@ -242,6 +242,40 @@ class Solution:
left = i + 1
return result
# 解法二(不相交区间法)
class Solution:
def partitionLabels(self, s: str) -> List[int]:
# 记录每个字母出现的区间
def getBord(s):
hash = [[-float('inf')] * 2 for _ in range(26)]
for i in range(len(s)):
if hash[ord(s[i]) - ord('a')][0] == -float('inf'):
hash[ord(s[i]) - ord('a')][0] = i
hash[ord(s[i]) - ord('a')][1] = i
# 去除字符串中未出现的字母所占用区间
hash_filter = []
for item in hash:
if item[0] != -float('inf'): hash_filter.append(item)
return hash_filter
# 得到无重叠区间题意中的输入样例格式:区间列表
hash = getBord(s)
# 按照左边界从小到大排序
hash.sort(key= lambda x: x[0])
res = []
left = 0
# 记录最大右边界
right = hash[0][1]
for i in range(len(hash)):
# 一旦下一区间左边界大于当前右边界,即可认为出现分割点
if hash[i][0] > right:
res.append(right - left + 1)
left = hash[i][0]
# 实时更新最大右边界
right = max(right, hash[i][1])
# 最右侧区间字符串长度为1时的特殊情况也包含于其中
res.append(right - left + 1)
return res
```
### Go