LeetCode Topics

Array

Problem Name	Difficulty
0001-two-sum	Easy
0088-merge-sorted-array	Easy
0169-majority-element	Easy
0189-rotate-array	Medium
0217-contains-duplicate	Easy
0283-move-zeroes	Easy
0485-max-consecutive-ones	Easy
0977-squares-of-a-sorted-array	Easy
1470-shuffle-the-array	Easy
1480-running-sum-of-1d-array	Easy
1512-number-of-good-pairs	Easy
1732-find-the-highest-altitude	Easy
1929-concatenation-of-array	Easy
2011-final-value-of-variable-after-performing-operations	Easy
2215-find-the-difference-of-two-arrays	Easy

String

Problem Name	Difficulty
0020-valid-parentheses	Easy
0125-valid-palindrome	Easy
0344-reverse-string	Easy
0345-reverse-vowels-of-a-string	Easy
0412-fizz-buzz	Easy
0680-valid-palindrome-ii	Easy
0771-jewels-and-stones	Easy
1047-remove-all-adjacent-duplicates-in-string	Easy
1370-increasing-decreasing-string	Easy
1768-merge-strings-alternately	Easy
2000-reverse-prefix-of-word	Easy
2011-final-value-of-variable-after-performing-operations	Easy

Simulation

Problem Name	Difficulty
0412-fizz-buzz	Easy
1929-concatenation-of-array	Easy
2011-final-value-of-variable-after-performing-operations	Easy

Two Pointers

Problem Name	Difficulty
0088-merge-sorted-array	Easy
0125-valid-palindrome	Easy
0189-rotate-array	Medium
0283-move-zeroes	Easy
0344-reverse-string	Easy
0345-reverse-vowels-of-a-string	Easy
0680-valid-palindrome-ii	Easy
0977-squares-of-a-sorted-array	Easy
1768-merge-strings-alternately	Easy
2000-reverse-prefix-of-word	Easy

Sorting

Problem Name	Difficulty
0088-merge-sorted-array	Easy
0169-majority-element	Easy
0217-contains-duplicate	Easy
0977-squares-of-a-sorted-array	Easy

Hash Table

Problem Name	Difficulty
0001-two-sum	Easy
0169-majority-element	Easy
0217-contains-duplicate	Easy
0771-jewels-and-stones	Easy
1370-increasing-decreasing-string	Easy
1512-number-of-good-pairs	Easy
2215-find-the-difference-of-two-arrays	Easy

Math

Problem Name	Difficulty
0189-rotate-array	Medium
0412-fizz-buzz	Easy
1512-number-of-good-pairs	Easy

Counting

Problem Name	Difficulty
0169-majority-element	Easy
1370-increasing-decreasing-string	Easy
1512-number-of-good-pairs	Easy

Greedy

Problem Name	Difficulty
0680-valid-palindrome-ii	Easy

Stack

Problem Name	Difficulty
0020-valid-parentheses	Easy
1047-remove-all-adjacent-duplicates-in-string	Easy
2000-reverse-prefix-of-word	Easy

Prefix Sum

Problem Name	Difficulty
1480-running-sum-of-1d-array	Easy
1732-find-the-highest-altitude	Easy

Divide and Conquer

Problem Name	Difficulty
0169-majority-element	Easy

Boyer–Moore Majority Vote Algorithm

Problem Name	Difficulty
0169-majority-element	Easy