Package g2101_2200.s2176_count_equal_and_divisible_pairs_in_an_array

Class Solution

java.lang.Object

g2101_2200.s2176_count_equal_and_divisible_pairs_in_an_array.Solution

public class Solution
extends Object

2176 - Count Equal and Divisible Pairs in an Array.

Easy

Given a 0-indexed integer array nums of length n and an integer k, return the number of pairs (i, j) where 0 <= i < j < n, such that nums[i] == nums[j] and (i * j) is divisible by k.

Example 1:

Input: nums = [3,1,2,2,2,1,3], k = 2

Output: 4

Explanation: There are 4 pairs that meet all the requirements:

• nums[0] == nums[6], and 0 * 6 == 0, which is divisible by 2.

• nums[2] == nums[3], and 2 * 3 == 6, which is divisible by 2.

• nums[2] == nums[4], and 2 * 4 == 8, which is divisible by 2.

• nums[3] == nums[4], and 3 * 4 == 12, which is divisible by 2.

Example 2:

Input: nums = [1,2,3,4], k = 1

Output: 0

Explanation: Since no value in nums is repeated, there are no pairs (i,j) that meet all the requirements.

Constraints:

• 1 <= nums.length <= 100
• 1 <= nums[i], k <= 100

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	countPairs(int[] nums, int k)

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

countPairs

public int countPairs(int[] nums,
 int k)