Package g0801_0900.s0839_similar_string_groups

Class Solution

java.lang.Object
g0801_0900.s0839_similar_string_groups.Solution
public class Solution extends java.lang.Object
839 - Similar String Groups.

Hard

Two strings X and Y are similar if we can swap two letters (in different positions) of X, so that it equals Y. Also two strings X and Y are similar if they are equal.

For example, "tars" and "rats" are similar (swapping at positions 0 and 2), and "rats" and "arts" are similar, but "star" is not similar to "tars", "rats", or "arts".

Together, these form two connected groups by similarity: {"tars", "rats", "arts"} and {"star"}. Notice that "tars" and "arts" are in the same group even though they are not similar. Formally, each group is such that a word is in the group if and only if it is similar to at least one other word in the group.

We are given a list strs of strings where every string in strs is an anagram of every other string in strs. How many groups are there?

Example 1:

Input: strs = [“tars”,“rats”,“arts”,“star”]

Output: 2

Example 2:

Input: strs = [“omv”,“ovm”]

Output: 1

Constraints:

  • 1 <= strs.length <= 300
  • 1 <= strs[i].length <= 300
  • strs[i] consists of lowercase letters only.
  • All words in strs have the same length and are anagrams of each other.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    numSimilarGroups(java.lang.String[] strs)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • numSimilarGroups

      public int numSimilarGroups(java.lang.String[] strs)