g2001_2100.s2053_kth_distinct_string_in_an_array

Class Solution

java.lang.Object

g2001_2100.s2053_kth_distinct_string_in_an_array.Solution

public class Solution
extends Object

2053 - Kth Distinct String in an Array.

Easy

A distinct string is a string that is present only once in an array.

Given an array of strings arr, and an integer k, return the kth distinct string present in arr. If there are fewer than k distinct strings, return an empty string "".

Note that the strings are considered in the order in which they appear in the array.

Example 1:

Input: arr = [“d”,“b”,“c”,“b”,“c”,“a”], k = 2

Output: “a”

Explanation:

The only distinct strings in arr are “d” and “a”.

“d” appears 1^st, so it is the 1^st distinct string.

“a” appears 2^nd, so it is the 2^nd distinct string.

Since k == 2, “a” is returned.

Example 2:

Input: arr = [“aaa”,“aa”,“a”], k = 1

Output: “aaa”

Explanation:

All strings in arr are distinct, so the 1^st string “aaa” is returned.

Example 3:

Input: arr = [“a”,“b”,“a”], k = 3

Output: ""

Explanation: The only distinct string is “b”. Since there are fewer than 3 distinct strings, we return an empty string "".

Constraints:

• 1 <= k <= arr.length <= 1000
• 1 <= arr[i].length <= 5
• arr[i] consists of lowercase English letters.

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
String	kthDistinct(String[] arr, int k)

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

kthDistinct

public String kthDistinct(String[] arr,
                          int k)