- https://www.geeksforgeeks.org/sum-of-natural-numbers-using-recursion/
- https://leetcode.com/problems/power-of-two/description/
- https://www.geeksforgeeks.org/problems/geek-onacci-number/0
- https://www.geeksforgeeks.org/first-uppercase-letter-in-a-string-iterative-and-recursive/
- https://leetcode.com/problems/power-of-three/
- https://leetcode.com/problems/power-of-four/
- https://www.geeksforgeeks.org/problems/check-if-an-array-is-sorted0701/1?itm_source=geeksforgeeks&itm_medium=article&itm_campaign=bottom_sticky_on_article
- https://www.geeksforgeeks.org/problems/recursively-remove-all-adjacent-duplicates0744/1?itm_source=geeksforgeeks&itm_medium=article&itm_campaign=bottom_sticky_on_article
- https://leetcode.com/problems/powx-n/description/
- https://www.geeksforgeeks.org/problems/n-digit-numbers-with-digits-in-increasing-order5903/1
- https://leetcode.com/problems/generate-parentheses/description/
- https://leetcode.com/problems/string-to-integer-atoi/submissions/884942399/
- https://www.geeksforgeeks.org/generate-binary-strings-without-consecutive-1s/?utm_source=youtube&utm_medium=collab_striver_ytdescription&utm_campaign=generate-binary-strings-without-consecutive-1s
- https://www.geeksforgeeks.org/problems/replace-all-0s-with-5/1?itm_source=geeksforgeeks&itm_medium=article&itm_campaign=bottom_sticky_on_article
- https://www.geeksforgeeks.org/print-even-and-odd-numbers-in-a-given-range-using-recursion/
- https://www.geeksforgeeks.org/find-all-the-possible-mappings-of-characters-in-a-sorted-order/
- https://www.geeksforgeeks.org/convert-a-string-to-an-integer-using-recursion/
- https://leetcode.com/problems/target-sum/description/
- https://leetcode.com/problems/subsets/
- https://leetcode.com/problems/subsets-ii/