g0801_0900.s0819_most_common_word

Class Solution

java.lang.Object

g0801_0900.s0819_most_common_word.Solution

public class Solution
extends 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 and Description
Solution()

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

Solution

public Solution()

Method Detail

mostCommonWord

public String mostCommonWord(String paragraph,
                             String[] banned)