Package g1301_1400.s1394_find_lucky_integer_in_an_array

Class Solution

java.lang.Object

g1301_1400.s1394_find_lucky_integer_in_an_array.Solution

public class Solution
extends Object

1394 - Find Lucky Integer in an Array\. Easy Given an array of integers `arr`, a **lucky integer** is an integer that has a frequency in the array equal to its value. Return _the largest **lucky integer** in the array_. If there is no **lucky integer** return `-1`. **Example 1:** **Input:** arr = [2,2,3,4] **Output:** 2 **Explanation:** The only lucky number in the array is 2 because frequency[2] == 2. **Example 2:** **Input:** arr = [1,2,2,3,3,3] **Output:** 3 **Explanation:** 1, 2 and 3 are all lucky numbers, return the largest of them. **Example 3:** **Input:** arr = [2,2,2,3,3] **Output:** -1 **Explanation:** There are no lucky numbers in the array. **Constraints:** * `1 <= arr.length <= 500` * `1 <= arr[i] <= 500`

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	findLucky(int[] arr)

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

findLucky

public int findLucky(int[] arr)