Package g0801_0900.s0819_most_common_word

Class Solution

java.lang.Object
g0801_0900.s0819_most_common_word.Solution
public class Solution extends java.lang.Object
819 - Most Common Word.

Easy

Given a string paragraph and a string array of the banned words banned, return the most frequent word that is not banned. It is guaranteed there is at least one word that is not banned, and that the answer is unique.

The words in paragraph are case-insensitive and the answer should be returned in lowercase.

Example 1:

Input: paragraph = “Bob hit a ball, the hit BALL flew far after it was hit.”, banned = [“hit”]

Output: “ball”

Explanation: “hit” occurs 3 times, but it is a banned word. “ball” occurs twice (and no other word does), so it is the most frequent non-banned word in the paragraph. Note that words in the paragraph are not case sensitive, that punctuation is ignored (even if adjacent to words, such as “ball,”), and that “hit” isn’t the answer even though it occurs more because it is banned.

Example 2:

Input: paragraph = “a.”, banned = []

Output: “a”

Constraints:

  • 1 <= paragraph.length <= 1000
  • paragraph consists of English letters, space ' ', or one of the symbols: "!?',;.".
  • 0 <= banned.length <= 100
  • 1 <= banned[i].length <= 10
  • banned[i] consists of only lowercase English letters.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    mostCommonWord(java.lang.String paragraph, java.lang.String[] banned)
     

    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

    • mostCommonWord

      public java.lang.String mostCommonWord(java.lang.String paragraph, java.lang.String[] banned)