Group Anagrams LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]

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Hello Programmers/Coders, Today we are going to share solutions to the Programming problems of LeetCode Solutions in C++, Java, & Python. At Each Problem with Successful submission with all Test Cases Passed, you will get a score or marks and LeetCode Coins. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.

In this post, you will find the solution for the Group Anagrams in C++, Java & Python-LeetCode problem. We are providing the correct and tested solutions to coding problems present on LeetCode. If you are not able to solve any problem, then you can take help from our Blog/website.

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About LeetCode

LeetCode is one of the most well-known online judge platforms to help you enhance your skills, expand your knowledge and prepare for technical interviews. 

LeetCode is for software engineers who are looking to practice technical questions and advance their skills. Mastering the questions in each level on LeetCode is a good way to prepare for technical interviews and keep your skills sharp. They also have a repository of solutions with the reasoning behind each step.

LeetCode has over 1,900 questions for you to practice, covering many different programming concepts. Every coding problem has a classification of either Easy, Medium, or Hard.

LeetCode problems focus on algorithms and data structures. Here is some topic you can find problems on LeetCode:

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  • Breadth-First Search
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  • Sorting & Searching
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  • Database
  • Linked List
  • Recursion, etc.

Leetcode has a huge number of test cases and questions from interviews too like Google, Amazon, Microsoft, Facebook, Adobe, Oracle, Linkedin, Goldman Sachs, etc. LeetCode helps you in getting a job in Top MNCs. To crack FAANG Companies, LeetCode problems can help you in building your logic.

Link for the Problem – Group Anagrams– LeetCode Problem 

Group Anagrams– LeetCode Problem

Problem:

Given an array of strings strs, group the anagrams together. You can return the answer in any order.

An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.

Example 1:

Input: strs = ["eat","tea","tan","ate","nat","bat"]
Output: [["bat"],["nat","tan"],["ate","eat","tea"]]

Example 2:

Input: strs = [""]
Output: [[""]]

Example 3:

Input: strs = ["a"]
Output: [["a"]]

Constraints:

  • 1 <= strs.length <= 104
  • 0 <= strs[i].length <= 100
  • strs[i] consists of lowercase English letters.
Group Anagrams– LeetCode Solutions
Group Anagrams in C++:
class Solution {
 public:
  vector<vector<string>> groupAnagrams(vector<string>& strs) {
    vector<vector<string>> ans;
    unordered_map<string, vector<string>> keyToAnagrams;

    for (const string& str : strs) {
      string key = str;
      sort(begin(key), end(key));
      keyToAnagrams[key].push_back(str);
    }

    for (const auto& [_, anagrams] : keyToAnagrams)
      ans.push_back(anagrams);

    return ans;
  }
};
Group Anagrams in Java:
class Solution {
  public List<List<String>> groupAnagrams(String[] strs) {
    Map<String, List<String>> keyToAnagrams = new HashMap<>();

    for (final String str : strs) {
      char[] chars = str.toCharArray();
      Arrays.sort(chars);
      String key = String.valueOf(chars);
      keyToAnagrams.computeIfAbsent(key, k -> new ArrayList<>()).add(str);
    }

    return new ArrayList<>(keyToAnagrams.values());
  }
}
Group Anagrams in Python:
class Solution:
  def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
    dict = defaultdict(list)

    for str in strs:
      key = ''.join(sorted(str))
      dict[key].append(str)

    return dict.values()

19 thoughts on “Group Anagrams LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]”

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