Leetcode - Partition Labels
https://leetcode.com/problems/partition-labels/
A string S of lowercase English 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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | func partitionLabels(S string) []int { hash := map[byte]int{} for i := 0; i < len(S); i++ { hash[S[i]] = i } last, start := 0, 0 result := []int{} for i := 0; i < len(S); i++ { last = max(last, hash[S[i]]) if last == i { result = append(result, last - start + 1) start = last + 1 } } return result}func max(a, b int) int { if a > b { return a } return b} |
3 年前
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2 年前
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