关键词:
A string S
of lowercase letters is given. We want to partition this string into as many parts as possible so that each letter appears in at most one part, and return a list of integers representing the size of these parts.
Example 1:
Input: S = "ababcbacadefegdehijhklij" Output: [9,7,8] Explanation: The partition is "ababcbaca", "defegde", "hijhklij". This is a partition so that each letter appears in at most one part. A partition like "ababcbacadefegde", "hijhklij" is incorrect, because it splits S into less parts.
Note:
S
will have length in range[1, 500]
.S
will consist of lowercase letters (‘a‘
to‘z‘
) only.
Approach #1: C++.
class Solution public: vector<int> partitionLabels(string S) int len = S.length(); int curLen = 0; vector<int> ans; for (int i = 0; i < len; ++i) curLen = helper(S, i); for (int j = i+1; j < curLen; ++j) curLen = max(curLen, helper(S, j)); ans.push_back(curLen-i+1); i = curLen; return ans; int helper(string S, int index) int curLen = index; int len = S.length(); int temp; while (index >= 0) curLen = index; index = S.find(S[curLen], curLen+1); return curLen; ;
Analysis:
I use helper function to find the last index of current character. In the partitionLabels function we traversing the string and find the min interval.
*leetcode763.partitionlabels(代码片段)
https://leetcode.com/problems/partition-labels/description/constintSIZE=256;classSolutionpublic:booljudge(intcnt[],inthash[])//boolret=true;for(inti=0;i<SIZE;i++)if(hash[i]= 查看详情
763.partitionlabels(代码片段)
Astring S oflowercaselettersisgiven.Wewanttopartitionthisstringintoasmanypartsaspossiblesothateachletterappearsinatmostonepart,andreturnalistofintegersrepresentingthesizeoftheseparts. Example1:Input:S="ababcbacadefegdehijhklij"Output:[9,7,8]Explanation:Thepartitionis"ababcbaca","defeg... 查看详情
763.partitionlabels分区标签
Astring S oflowercaselettersisgiven.Wewanttopartitionthisstringintoasmanypartsaspossiblesothateachletterappearsinatmostonepart,andreturnalistofintegersrepresentingthesizeoftheseparts.Example 查看详情
leetcode763.partitionlabels划分字母区间(中等)
一个字符串S,将其尽可能多的分割为子字符串,条件是每种字符最多只能出现在一个子串中。上面的示例中,字符串S中有多个a,这些a必须只能在第一个子串中,字母e出现在第二个子串中。这道题难点就是如何找到字符串的断... 查看详情
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