代码随想录算法训练营DAY36补｜ 435. 无重叠区间、 763.划分字母区间

训练营计划更新了，补一下DAY36多出来的两道题

435. 无重叠区间

• 题目链接：435. 无重叠区间

class Solution(object):
    def eraseOverlapIntervals(self, intervals):
        """
        :type intervals: List[List[int]]
        :rtype: int
        """
        if not intervals:
            return 0

        intervals.sort(key=lambda x:x[0])
        result = 0

        for i in range(len(intervals)-1):
            if intervals[i][1]>intervals[i+1][0]:
                intervals[i+1][1] = min(intervals[i+1][1], intervals[i][1])
                result+=1

        return result

763.划分字母区间

• 题目链接：763.划分字母区间

class Solution(object):
    def partitionLabels(self, s):
        """
        :type s: str
        :rtype: List[int]
        """
        last_occur = {}
        results = []

        start = 0
        end = 0

        for i, ch in enumerate(s):
            last_occur[ch]=i

        for i, ch in enumerate(s):
            end = max(end, last_occur[ch])
            if i==end:
                results.append(end-start+1)
                start = i+1
        
        return results