Group Anagrams: coding question

Problem

You get an array of strings strs. Put the strings into groups, so that each group contains only anagrams of each other.

Two strings are anagrams when they contain the same characters the same number of times. The order of the characters can be different. For example, "night" and "thing" are anagrams.

Return a list of the groups. You can return the groups in any order, and the strings in each group in any order.

Example 1

Input:: strs = ["pots","stop","cat","tops","act","dog"]
Output:: [["pots","stop","tops"],["cat","act"],["dog"]]
Explanation:: The strings "pots", "stop" and "tops" use the same letters. The string "dog" has no anagram in the list, so it is a group of one.

Example 2

Input:: strs = ["","b",""]
Output:: [["",""],["b"]]
Explanation:: The two empty strings are anagrams of each other.

Example 3

Input:: strs = ["abc","bca","cab","xyz"]
Output:: [["abc","bca","cab"],["xyz"]]

Constraints

1 <= strs.length <= 10^4
0 <= strs[i].length <= 100
strs[i] contains only lowercase English letters.

SysRound wrote this statement. A reference solution checks every example.

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Amazon
Leetcode 49. Group Anagrams
Reported Mar 20, 2025 · 2 source reports
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Arize Ai
Leetcode 49. Group Anagrams
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Leetcode 49. Group Anagrams
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Problem

You get an array of strings strs. Put the strings into groups, so that each group contains only anagrams of each other.

Two strings are anagrams when they contain the same characters the same number of times. The order of the characters can be different. For example, "night" and "thing" are anagrams.

Return a list of the groups. You can return the groups in any order, and the strings in each group in any order.

Example 1

Input:: strs = ["pots","stop","cat","tops","act","dog"]
Output:: [["pots","stop","tops"],["cat","act"],["dog"]]
Explanation:: The strings "pots", "stop" and "tops" use the same letters. The string "dog" has no anagram in the list, so it is a group of one.

Example 2

Input:: strs = ["","b",""]
Output:: [["",""],["b"]]
Explanation:: The two empty strings are anagrams of each other.

Example 3

Input:: strs = ["abc","bca","cab","xyz"]
Output:: [["abc","bca","cab"],["xyz"]]

Constraints

1 <= strs.length <= 10^4
0 <= strs[i].length <= 100
strs[i] contains only lowercase English letters.

SysRound wrote this statement. A reference solution checks every example.

Group Anagrams

Problem

Example 1

Example 2

Example 3

Constraints

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Group Anagrams

Problem

Example 1

Example 2

Example 3

Constraints

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