Learn how to solve the Leetcode problem of id 1512, whose title is Number of Good Pairs, using the Java programming language.

https://leetcode.com/problems/number-of-good-pairs

The Data Structures and Algorithms (DSA) lesson uses an iterative approach with a hash map.

Traversing the array, you can keep track of the count of good pairs so far in an integer variable.

The hash map is used to keep track of the counts for each of the specific numbers found.

The time complexity for the solution is O(n) and its space complexity is O(n).

DSA problems are sometimes asked during tech job interviews for positions such as Software Engineer, so you can use the challenge to practice that skill.