sir-gon · sir-gon · Aug 14, 2024 · Jul 17, 2024 · Jul 18, 2024 · Jul 26, 2024
diff --git a/docs/hackerrank/interview_preparation_kit/arrays/crush.md b/docs/hackerrank/interview_preparation_kit/arrays/crush.md
@@ -1,9 +1,9 @@
-# [Arrays: New Year Chaos](https://www.hackerrank.com/challenges/crush)
+# [Arrays: Array Manipulation](https://www.hackerrank.com/challenges/crush)
 
 Perform m operations on an array and print the maximum of the values.
 
-- Difficulty:  ` #hard `
-- Category: ` #ProblemSolvingIntermediate `
+- Difficulty:  `#hard`
+- Category: `#ProblemSolvingIntermediate` `#arrays`
 
 Starting with a 1-indexed array of zeros and a list of operations, for each
 operation add a value to each the array element between two given indices,

diff --git a/docs/hackerrank/interview_preparation_kit/arrays/crush_optimized-solution-notes.md b/docs/hackerrank/interview_preparation_kit/arrays/crush_optimized-solution-notes.md
@@ -2,8 +2,8 @@
 
 Perform m operations on an array and print the maximum of the values.
 
-- Difficulty:  ` #hard `
-- Category: ` #ProblemSolvingIntermediate `
+- Difficulty:  `#hard`
+- Category: `#ProblemSolvingIntermediate` `#arrays`
 
 ## Solution sources
 

diff --git a/docs/hackerrank/interview_preparation_kit/arrays/ctci_array_left_rotation.md b/docs/hackerrank/interview_preparation_kit/arrays/ctci_array_left_rotation.md
@@ -2,8 +2,8 @@
 
 Given an array and a number, d, perform d left rotations on the array.
 
-- Difficulty: #easy
-- Category: #ProblemSolvingBasic
+- Difficulty: `#easy`
+- Category: `#ProblemSolvingBasic` `#arrays`
 
 A left rotation operation on an array shifts each of the array's elements
 $ 1 $ unit to the left. For example, if $ 2 $ left rotations are performed

diff --git a/docs/hackerrank/interview_preparation_kit/arrays/minimum_swaps_2.md b/docs/hackerrank/interview_preparation_kit/arrays/minimum_swaps_2.md
@@ -1,9 +1,9 @@
-# [Arrays: New Year Chaos](https://www.hackerrank.com/challenges/minimum-swaps-2)
+# [Arrays: Minimum Swaps 2](https://www.hackerrank.com/challenges/minimum-swaps-2)
 
 Return the minimum number of swaps to sort the given array.
 
-- Difficulty:  ` #medium `
-- Category: ` #ProblemSolvingIntermediate `
+- Difficulty:  `#medium`
+- Category: `#ProblemSolvingIntermediate` `#arrays`
 
 You are given an unordered array consisting of consecutive integers
 [1, 2, 3, ..., n] without any duplicates. You are allowed to swap any

diff --git a/docs/hackerrank/interview_preparation_kit/arrays/new_year_chaos-solution-notes.md b/docs/hackerrank/interview_preparation_kit/arrays/new_year_chaos-solution-notes.md
@@ -2,8 +2,8 @@
 
 Determine how many bribes took place to get a queue into its current state.
 
-- Difficulty:  ` #medium `
-- Category: ` #ProblemSolvingBasic `
+- Difficulty:  `#medium`
+- Category: `#ProblemSolvingBasic` `#arrays`
 
 ## Solution sources
 

diff --git a/docs/hackerrank/interview_preparation_kit/arrays/new_year_chaos.md b/docs/hackerrank/interview_preparation_kit/arrays/new_year_chaos.md
@@ -2,8 +2,8 @@
 
 Determine how many bribes took place to get a queue into its current state.
 
-- Difficulty:  ` #medium `
-- Category: ` #ProblemSolvingBasic `
+- Difficulty:  `#medium`
+- Category: `#ProblemSolvingBasic` `#arrays`
 
 It is New Year's Day and people are in line for the Wonderland rollercoaster ride.
 Each person wears a sticker indicating their initial position in

diff --git a/...ew_preparation_kit/dictionaries_and_hashmaps/count_triplets_1-solution-notes.md b/...ew_preparation_kit/dictionaries_and_hashmaps/count_triplets_1-solution-notes.md
@@ -1,7 +1,7 @@
 # [Dictionaries and Hashmaps: Count Triplets](https://www.hackerrank.com/challenges/count-triplets-1)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#dictionaries` `#hashmaps`
 
 ## Failed tries
 

diff --git a/...kerrank/interview_preparation_kit/dictionaries_and_hashmaps/count_triplets_1.md b/...kerrank/interview_preparation_kit/dictionaries_and_hashmaps/count_triplets_1.md
@@ -1,7 +1,7 @@
 # [Dictionaries and Hashmaps: Count Triplets](https://www.hackerrank.com/challenges/count-triplets-1)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#dictionaries` `#hashmaps`
 
 You are given an array and you need to find number of
 tripets of indices (i, j, k) such that the elements at

diff --git a/...kerrank/interview_preparation_kit/dictionaries_and_hashmaps/ctci-ransom-note.md b/...kerrank/interview_preparation_kit/dictionaries_and_hashmaps/ctci-ransom-note.md
@@ -1,7 +1,7 @@
 # [Hash Tables: Ransom Notes](https://www.hackerrank.com/challenges/ctci-ransom-note)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#dictionaries` `#hashmaps`
 
 Harold is a kidnapper who wrote a ransom note, but now he is worried it will be
 traced back to him through his handwriting. He found a magazine and wants to

diff --git a/...errank/interview_preparation_kit/dictionaries_and_hashmaps/frequency-queries.md b/...errank/interview_preparation_kit/dictionaries_and_hashmaps/frequency-queries.md
@@ -1,7 +1,7 @@
 # [Dictionaries and Hashmaps: Frequency Queries](https://www.hackerrank.com/challenges/frequency-queries)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#dictionaries` `#hashmaps`
 
 You are given  queries. Each query is of the form two integers described below:
 

diff --git a/...nk/interview_preparation_kit/dictionaries_and_hashmaps/sherlock_and_anagrams.md b/...nk/interview_preparation_kit/dictionaries_and_hashmaps/sherlock_and_anagrams.md
@@ -1,7 +1,7 @@
-# [Sherlock and Anagrams](https://www.hackerrank.com/challenges/mark-and-toys)
+# [Sherlock and Anagrams](https://www.hackerrank.com/challenges/sherlock-and-anagrams)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingMedium` `#DictionariesAndHashmaps` `#Strings`
+- Category: `#ProblemSolvingMedium` `#dictionaries` `#hashmaps` `#strings`
 
 Two strings are [http://en.wikipedia.org/wiki/Anagram](anagrams) of each other
 if the letters of one string can be rearranged to form the other string.

diff --git a/...terview_preparation_kit/dictionaries_and_hashmaps/two-strings-solution-notes.md b/...terview_preparation_kit/dictionaries_and_hashmaps/two-strings-solution-notes.md
@@ -1,7 +1,7 @@
 # [Two Strings](https://www.hackerrank.com/challenges/two-strings)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#dictionaries` `#hashmaps`
 
 ## Clarification
 

diff --git a/docs/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/two-strings.md b/docs/hackerrank/interview_preparation_kit/dictionaries_and_hashmaps/two-strings.md
@@ -1,7 +1,7 @@
 # [Two Strings](https://www.hackerrank.com/challenges/two-strings)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#dictionaries` `#hashmaps`
 
 Given two strings, determine if they share a common substring.
 A substring may be as small as one character.

diff --git a/...k/interview_preparation_kit/dynamic_programming/max_array_sum-solution-notes.md b/...k/interview_preparation_kit/dynamic_programming/max_array_sum-solution-notes.md
@@ -1,7 +1,7 @@
 # [Dynamic Programming: Max Array Sum](https://www.hackerrank.com/challenges/max-array-sum)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#dynamicprogramming`
 
 ## Sources
 

diff --git a/docs/hackerrank/interview_preparation_kit/dynamic_programming/max_array_sum.md b/docs/hackerrank/interview_preparation_kit/dynamic_programming/max_array_sum.md
@@ -1,7 +1,7 @@
 # [Dynamic Programming: Max Array Sum](https://www.hackerrank.com/challenges/max-array-sum)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#dynamicprogramming`
 
 Given an array of integers, find the subset of
 non-adjacent elements with the maximum sum.

diff --git a/...ckerrank/interview_preparation_kit/graphs/roads_and_libraries-solution-notes.md b/...ckerrank/interview_preparation_kit/graphs/roads_and_libraries-solution-notes.md
@@ -4,7 +4,7 @@ Help the ruler of HackerLand determine the cheapest way to
 give his citizens access to libraries.
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingAdvanced`
+- Category: `#ProblemSolvingAdvanced` `#graphs`
 
 ## Solution research
 

diff --git a/docs/hackerrank/interview_preparation_kit/graphs/roads_and_libraries.md b/docs/hackerrank/interview_preparation_kit/graphs/roads_and_libraries.md
@@ -4,7 +4,7 @@ Help the ruler of HackerLand determine the cheapest way to
 give his citizens access to libraries.
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingAdvanced`
+- Category: `#ProblemSolvingAdvanced` `#graphs`
 
 Determine the minimum cost to provide library access to all
 citizens of HackerLand.

diff --git a/docs/hackerrank/interview_preparation_kit/greedy_algorithms/angry-children.md b/docs/hackerrank/interview_preparation_kit/greedy_algorithms/angry-children.md
@@ -1,8 +1,7 @@
-
-# [Greedy Algorithms: Greedy Florist](https://www.hackerrank.com/challenges/greedy-florist)
+# [Greedy Algorithms: Max Min](https://www.hackerrank.com/challenges/angry-children)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#greedyalgorithms`
 
 You will be given a list of integers, `arr`, and a single integer `k`.
 You must create an array of length `k` from elements of `arr` such that

diff --git a/...nk/interview_preparation_kit/greedy_algorithms/greedy-florist-solution-notes.md b/...nk/interview_preparation_kit/greedy_algorithms/greedy-florist-solution-notes.md
@@ -1,7 +1,7 @@
 # [Greedy Algorithms: Greedy Florist](https://www.hackerrank.com/challenges/greedy-florist)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#greedyalgorithms`
 
 ## About the problem statement
 

diff --git a/docs/hackerrank/interview_preparation_kit/greedy_algorithms/greedy-florist.md b/docs/hackerrank/interview_preparation_kit/greedy_algorithms/greedy-florist.md
@@ -1,7 +1,7 @@
 # [Greedy Algorithms: Greedy Florist](https://www.hackerrank.com/challenges/greedy-florist)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#greedyalgorithms`
 
 A group of friends want to buy a bouquet of flowers.
 The florist wants to maximize his number of new customers and the money he makes.

diff --git a/docs/hackerrank/interview_preparation_kit/greedy_algorithms/luck-balance.md b/docs/hackerrank/interview_preparation_kit/greedy_algorithms/luck-balance.md
@@ -1,7 +1,7 @@
 # [Greedy Algorithms: Luck Balance](https://www.hackerrank.com/challenges/luck-balance)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#greedyalgorithms`
 
 Lena is preparing for an important coding competition that is preceded
 by a number of sequential preliminary contests.

diff --git a/...ew_preparation_kit/greedy_algorithms/minimum-absolute-difference-in-an-array.md b/...ew_preparation_kit/greedy_algorithms/minimum-absolute-difference-in-an-array.md
@@ -1,7 +1,7 @@
 # [Minimum Absolute Difference in an Array](https://www.hackerrank.com/challenges/minimum-absolute-difference-in-an-array)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#greedyalgorithms`
 
 The absolute difference is the positive difference between two
 values `a` and `b`, is written $ \lvert a - b \rvert $

diff --git a/docs/hackerrank/interview_preparation_kit/linked_lists/ctci_linked_list_cycle.md b/docs/hackerrank/interview_preparation_kit/linked_lists/ctci_linked_list_cycle.md
@@ -1,7 +1,7 @@
 # [Linked Lists: Detect a Cycle](https://www.hackerrank.com/challenges/ctci-linked-list-cycle)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#linkedlists`
 
 A linked list is said to contain a cycle if any node is visited more
 than once while traversing the list.

diff --git a/...preparation_kit/linked_lists/find-the-merge-point-of-two-joined-linked-lists.md b/...preparation_kit/linked_lists/find-the-merge-point-of-two-joined-linked-lists.md
@@ -1,7 +1,7 @@
 # [Linked Lists: Find Merge Point of Two Lists](https://www.hackerrank.com/challenges/find-the-merge-point-of-two-joined-linked-lists)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#linkedlists`
 
 Given pointers to the head nodes of  linked lists that merge together
 at some point, find the node where the two lists merge.

diff --git a/...ation_kit/linked_lists/insert-a-node-at-a-specific-position-in-a-linked-list.md b/...ation_kit/linked_lists/insert-a-node-at-a-specific-position-in-a-linked-list.md
@@ -1,7 +1,7 @@
 # [Linked Lists: Insert a node at a specific position in a linked list](https://www.hackerrank.com/challenges/insert-a-node-at-a-specific-position-in-a-linked-list)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#linkedlists`
 
 Given the pointer to the head node of a linked list and an integer
 to insert at a certain position, create a new node with the given

diff --git a/..._preparation_kit/linked_lists/insert-a-node-into-a-sorted-doubly-linked-list.md b/..._preparation_kit/linked_lists/insert-a-node-into-a-sorted-doubly-linked-list.md
@@ -3,7 +3,7 @@
 Create a node with a given value and insert it into a sorted doubly-linked list
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#linkedlists`
 
 Given a reference to the head of a doubly-linked list and an integer, `data`,
 create a new DoublyLinkedListNode object having data value `data` and insert

diff --git a/...ckerrank/interview_preparation_kit/linked_lists/reverse-a-doubly-linked-list.md b/...ckerrank/interview_preparation_kit/linked_lists/reverse-a-doubly-linked-list.md
@@ -3,7 +3,7 @@
 Given the head node of a doubly linked list, reverse it.
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#linkedlists`
 
 Given the pointer to the head node of a doubly linked list,
 reverse the order of the nodes in place.

diff --git a/docs/hackerrank/interview_preparation_kit/miscellaneous/flipping-bits.md b/docs/hackerrank/interview_preparation_kit/miscellaneous/flipping-bits.md
@@ -1,7 +1,7 @@
-# [Miscellaneous: Flipping bits](https://www.hackerrank.com/challenges/flipping-bitse)
+# [Miscellaneous: Flipping bits](https://www.hackerrank.com/challenges/flipping-bits)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#BitManipulation`
 
 You will be given a list of 32 bit unsigned integers.
 Flip all the bits ( `1 -> 0` and `0 -> 1`)

diff --git a/...ation_kit/recursion_and_backtracking/ctci-recursive-staircase-solution-notes.md b/...ation_kit/recursion_and_backtracking/ctci-recursive-staircase-solution-notes.md
@@ -4,7 +4,7 @@ Find the number of ways to get from the bottom of a staircase
 to the top if you can jump 1, 2, or 3 stairs at a time.
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#recursion`
 
 ## Failed solution
 

diff --git a/...nterview_preparation_kit/recursion_and_backtracking/ctci-recursive-staircase.md b/...nterview_preparation_kit/recursion_and_backtracking/ctci-recursive-staircase.md
@@ -4,7 +4,7 @@ Find the number of ways to get from the bottom of a staircase
 to the top if you can jump 1, 2, or 3 stairs at a time.
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#recursion`
 
 Davis has a number of staircases in his house and he likes to
 climb each staircase `1`, `2`, or `3` steps at a time.

diff --git a/.../interview_preparation_kit/recursion_and_backtracking/ctci_fibonacci_numbers.md b/.../interview_preparation_kit/recursion_and_backtracking/ctci_fibonacci_numbers.md
@@ -1,7 +1,7 @@
 # [The Fibonacci Sequence](https://www.hackerrank.com/challenges/ctci-fibonacci-numbers)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#recursion`
 
 ## The Fibonacci Sequence
 

diff --git a/...reparation_kit/recursion_and_backtracking/recursive-digit-sum-solution-notes.md b/...reparation_kit/recursion_and_backtracking/recursive-digit-sum-solution-notes.md
@@ -1,7 +1,7 @@
 # [Recursive Digit Sum](https://www.hackerrank.com/challenges/recursive-digit-sum)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#recursion`
 
 ## Language Difficulties
 

diff --git a/...ank/interview_preparation_kit/recursion_and_backtracking/recursive-digit-sum.md b/...ank/interview_preparation_kit/recursion_and_backtracking/recursive-digit-sum.md
@@ -1,7 +1,7 @@
 # [Recursive Digit Sum](https://www.hackerrank.com/challenges/recursive-digit-sum)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#recursion`
 
 We define super digit of an integer `x` using the following rules:
 

diff --git a/...errank/interview_preparation_kit/search/ctci-ice-cream-parlor-solution-notes.md b/...errank/interview_preparation_kit/search/ctci-ice-cream-parlor-solution-notes.md
@@ -1,7 +1,7 @@
 # [Hash Tables: Ice Cream Parlor](https://www.hackerrank.com/challenges/ctci-ice-cream-parlor)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#search` `#hashtables`
 
 ## Failed tries
 

diff --git a/docs/hackerrank/interview_preparation_kit/search/ctci-ice-cream-parlor.md b/docs/hackerrank/interview_preparation_kit/search/ctci-ice-cream-parlor.md
@@ -1,7 +1,7 @@
 # [Search: Hash Tables: Ice Cream Parlor](https://www.hackerrank.com/challenges/ctci-ice-cream-parlor)
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate` `#Hashtables` `#Search`
+- Category: `#ProblemSolvingIntermediate` `#search` `#hashtables`
 
 Each time Sunny and Johnny take a trip to the Ice Cream Parlor,
 they pool their money to buy ice cream.

diff --git a/docs/hackerrank/interview_preparation_kit/search/swap-nodes-algo.md b/docs/hackerrank/interview_preparation_kit/search/swap-nodes-algo.md
@@ -1,10 +1,10 @@
-# [Hash Tables: Ice Cream Parlor](https://www.hackerrank.com/challenges/ctci-ice-cream-parlor)
+# [Swap Nodes [Algo]](https://www.hackerrank.com/challenges/swap-nodes-algo)
 
 Given a tree and an integer, K, we have to swap the subtrees of
 all the nodes which are at a depth h
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingAdvanced`
+- Category: `#ProblemSolvingAdvanced` `#search`
 
 A binary tree is a tree which is characterized by one of the following properties:
 

diff --git a/docs/hackerrank/interview_preparation_kit/sort/ctci-bubble-sort.md b/docs/hackerrank/interview_preparation_kit/sort/ctci-bubble-sort.md
@@ -1,9 +1,9 @@
-# [Sorting: Bubble Sort](https://www.hackerrank.com/interview/interview-preparation-kit/sorting)
+# [Sorting: Bubble Sort](https://www.hackerrank.com/challenges/ctci-bubble-sort/)
 
 Find the minimum number of conditional checks taking place in Bubble Sort
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#sorting`
 
 Consider the following version of Bubble Sort:
 

diff --git a/docs/hackerrank/interview_preparation_kit/sort/ctci-comparator-sorting.md b/docs/hackerrank/interview_preparation_kit/sort/ctci-comparator-sorting.md
@@ -3,7 +3,7 @@
 Write a Comparator for sorting elements in an array.
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#sorting`
 
 Comparators are used to compare two objects.
 In this challenge, you'll create a comparator and use it to sort an array.

diff --git a/docs/hackerrank/interview_preparation_kit/sort/mark-and-toys.md b/docs/hackerrank/interview_preparation_kit/sort/mark-and-toys.md
@@ -3,7 +3,7 @@
 You are Mark's best friend and have to help him buy as many toys as possible.
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#sorting`
 
 Mark and Jane are very happy after having their first child.
 Their son loves toys, so Mark wants to buy some.

diff --git a/docs/hackerrank/interview_preparation_kit/stacks_and_queues/balanced-brackets.md b/docs/hackerrank/interview_preparation_kit/stacks_and_queues/balanced-brackets.md
@@ -1,9 +1,9 @@
-# [Balanced Brackets](https://www.hackerrank.com/interview/interview-preparation-kit/sorting)
+# [Balanced Brackets](https://www.hackerrank.com/challenges/balanced-brackets/)
 
 Given a string containing three types of brackets, determine if it is balanced.
 
 - Difficulty:  `#medium`
-- Category: `#ProblemSolvingIntermediate`
+- Category: `#ProblemSolvingIntermediate` `#stacksAndQueues`
 
 A bracket is considered to be any one of the following characters:
 (, ), {, }, [, or ].

diff --git a/...kerrank/interview_preparation_kit/string_manipulation/alternating-characters.md b/...kerrank/interview_preparation_kit/string_manipulation/alternating-characters.md
@@ -1,7 +1,7 @@
-# [Strings: Making Anagrams](https://www.hackerrank.com/challenges/alternating-characters)
+# [Strings: Alternating Characters](https://www.hackerrank.com/challenges/alternating-characters)
 
 - Difficulty:  `#easy`
-- Category: `#ProblemSolvingBasic`
+- Category: `#ProblemSolvingBasic` `#strings`
 
 You are given a string containing characters `A` and `B` only.
 Your task is to change it into a string such that there are