Package g2401_2500.s2451_odd_string_difference

Class Solution

java.lang.Object
g2401_2500.s2451_odd_string_difference.Solution
public class Solution extends java.lang.Object
2451 - Odd String Difference.

Easy

You are given an array of equal-length strings words. Assume that the length of each string is n.

Each string words[i] can be converted into a difference integer array difference[i] of length n - 1 where difference[i][j] = words[i][j+1] - words[i][j] where 0 <= j <= n - 2. Note that the difference between two letters is the difference between their positions in the alphabet i.e. the position of 'a' is 0, 'b' is 1, and 'z' is 25.

  • For example, for the string "acb", the difference integer array is [2 - 0, 1 - 2] = [2, -1].

All the strings in words have the same difference integer array, except one. You should find that string.

Return the string in words that has different difference integer array.

Example 1:

Input: words = [“adc”,“wzy”,“abc”]

Output: “abc”

Explanation:

  • The difference integer array of “adc” is [3 - 0, 2 - 3] = [3, -1].

  • The difference integer array of “wzy” is [25 - 22, 24 - 25]= [3, -1].

  • The difference integer array of “abc” is [1 - 0, 2 - 1] = [1, 1].

The odd array out is [1, 1], so we return the corresponding string, “abc”.

Example 2:

Input: words = [“aaa”,“bob”,“ccc”,“ddd”]

Output: “bob”

Explanation: All the integer arrays are [0, 0] except for “bob”, which corresponds to [13, -13].

Constraints:

  • 3 <= words.length <= 100
  • n == words[i].length
  • 2 <= n <= 20
  • words[i] consists of lowercase English letters.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    oddString(java.lang.String[] w)
     

    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

    • oddString

      public java.lang.String oddString(java.lang.String[] w)