Package g3501_3600.s3527_find_the_most_common_response

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    3527 - Find the Most Common Response.

    Medium

    You are given a 2D string array responses where each responses[i] is an array of strings representing survey responses from the <code>i<sup>th</sup></code> day.

    Return the most common response across all days after removing duplicate responses within each responses[i]. If there is a tie, return the lexicographically smallest response.

    Example 1:

    Input: responses = ["good","ok","good","ok","ok","bad","good","ok","ok","good","bad"]

    Output: "good"

    Explanation:

    • After removing duplicates within each list, responses = [["good", "ok"], ["ok", "bad", "good"], ["good"], ["bad"]].

    • "good" appears 3 times, "ok" appears 2 times, and "bad" appears 2 times.

    • Return "good" because it has the highest frequency.

    Example 2:

    Input: responses = ["good","ok","good","ok","bad","bad","notsure","great","good"]

    Output: "bad"

    Explanation:

    • After removing duplicates within each list we have responses = [["good", "ok"], ["ok", "bad"], ["bad", "notsure"], ["great", "good"]].

    • "bad", "good", and "ok" each occur 2 times.

    • The output is "bad" because it is the lexicographically smallest amongst the words with the highest frequency.

    Constraints:

    • 1 &lt;= responses.length &lt;= 1000

    • 1 &lt;= responses[i].length &lt;= 1000

    • 1 &lt;= responses[i][j].length &lt;= 10

    • responses[i][j] consists of only lowercase English letters

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final String findCommonResponse(List<List<String>> responses)

      • Methods inherited from class java.lang.Object

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