Leetcode Problem 2176. Count Equal and Divisible Pairs in an Array
2176. Count Equal and Divisible Pairs in an Array
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Leetcode Solutions
Brute Force Approach
Solution Idea
Algorithm Steps
Code Implementation
Complexity Analysis
Initialize a variable
count
to 0 to store the number of valid pairs.
Iterate over the array with two nested loops, with the outer loop index
i
ranging from 0 to
n-2
and the inner loop index
j
ranging from
i+1
to
n-1
.
For each pair
(i, j)
, check if
nums[i] == nums[j]
.
If the elements are equal, check if
(i * j) % k == 0
.
If both conditions are satisfied, increment
count
by 1.
After the loops finish, return the value of
count
.
Frequency Map with Divisibility Optimization
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