> For the complete documentation index, see [llms.txt](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding.md).

# Searching

- [Union-Find Algorithms](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/union-find-algorithms.md)
- [Finding Peak](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/finding-peak.md)
- [Find Sum in Array](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/find-sum-in-array.md)
- [Binary Search](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search.md)
- [Find Index Binary Search](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/find-index-binary-search.md)
- [Sqrt(x)](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/sqrtx.md)
- [Search in Rotated Sorted Array](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/search-in-rotated-sorted-array.md)
- [Guess Number Higher or Lower](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/guess-number-higher-or-lower.md)
- [First Bad Version](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/first-bad-version.md)
- [Find Peak Element](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/find-peak-element.md)
- [Find Minimum in Rotated Sorted Array](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/find-minimum-in-rotated-sorted-array.md)
- [Find Minimum in Rotated Sorted Array II](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/find-minimum-in-rotated-sorted-array-ii.md)
- [Search for a Range](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/search-for-a-range.md)
- [Closest Binary Search Tree Value](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/closest-binary-search-tree-value.md)
- [Find K Closest Elements](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/find-k-closest-elements.md)
- [Search in a Sorted Array of Unknown Size](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/search-in-a-sorted-array-of-unknown-size.md)
- [Pow(x, n)](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/powx-n.md)
- [Valid Perfect Square](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/valid-perfect-square.md)
- [Find Minimum in Rotated Sorted Array II](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/find-minimum-in-rotated-sorted-array-ii-1.md)
- [Intersection of Two Arrays](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/intersection-of-two-arrays.md)
- [Intersection of Two Arrays II](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/intersection-of-two-arrays-ii.md)
- [Two Sum II - Input array is sorted](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/two-sum-ii-input-array-is-sorted.md)
- [Find the Duplicate Number](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/binary-search/find-the-duplicate-number.md)
- [Longest Common Prefix](https://ondrej-kvasnovsky-2.gitbook.io/algorithms/finding/longest-common-prefix.md)