How to Solve Positions of Large Groups Problem
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Positions of Large Groups
In a string s of lowercase letters, these letters form consecutive groups of the same character. For example, a string like s = "abbxxxxzyy" has the groups "a", "bb", "xxxx", "z", and "yy". A group is...
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Understanding the Positions of Large Groups Problem
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Problem Statement
In a string s of lowercase letters, these letters form consecutive groups of the same character. For example, a string like s = "abbxxxxzyy" has the groups "a", "bb", "xxxx", "z", and "yy". A group is identified by an interval [start, end], where start and end denote the start and end indices (inclusive) of the group. In the above example, "xxxx" has the interval [3,6]. A group is considered large if it has 3 or more characters. Return the intervals of every large group sorted in increasing order by start index.
Positions of Large Groups
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Examples
s = "abbxxxxzzy"[[3,6]]"xxxx" is the only large group with start index 3 and end index 6.
s = "abc"[]We have groups "a", "b", and "c", none of which are large groups.
s = "abcdddeeeeaabbbcd"[[3,5],[6,9],[12,14]]The large groups are "ddd", "eeee", and "bbb".
Constraints
1 <= s.length <= 1000s contains lowercase English letters only.How Interview Coder Helps with Leetcode Problems
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