README.md

알고리즘

알고리즘을 풀고 정리하는 Repository입니다.🕵️

📊 활동

🧾 풀이 요약

플랫폼	풀이 수	최근 풀이일
Baekjoon	442	2026-04-16
Programmers	207	2026-02-12
LeetCode	64	2026-07-18
CodeTree	111	2025-02-28
Total	824	-

🆕 최근 풀이

날짜	문제	플랫폼	링크
2026-07-18	0322-coin-change	LeetCode	코드
2026-07-17	0079-word-search	LeetCode	코드
2026-07-17	0153-find-minimum-in-rotated-sorted-array	LeetCode	코드
2026-07-14	0104-maximum-depth-of-binary-tree	LeetCode	코드
2026-07-13	0021-merge-two-sorted-lists	LeetCode	코드
2026-07-10	0053-maximum-subarray	LeetCode	코드
2026-07-10	0091-decode-ways	LeetCode	코드
2026-07-08	0039-combination-sum	LeetCode	코드
2026-07-07	0191-number-of-1-bits	LeetCode	코드
2026-07-06	0125-valid-palindrome	LeetCode	코드
2026-07-02	0098-validate-binary-search-tree	LeetCode	코드
2026-07-01	0015-3sum	LeetCode	코드
2026-06-30	0238-product-of-array-except-self	LeetCode	코드
2026-06-29	0070-climbing-stairs	LeetCode	코드
2026-06-28	0242-valid-anagram	LeetCode	코드
2026-06-25	0198-house-robber	LeetCode	코드
2026-06-24	0128-longest-consecutive-sequence	LeetCode	코드
2026-06-23	0347-top-k-frequent-elements	LeetCode	코드
2026-06-22	0001-two-sum	LeetCode	코드
2026-06-22	0217-contains-duplicate	LeetCode	코드

LeetCode Topics

Array

Problem Name	Difficulty
0001-two-sum	Easy
0015-3sum	Medium
0039-combination-sum	Medium
0053-maximum-subarray	Medium
0079-word-search	Medium
0119-pascals-triangle-ii	Easy
0128-longest-consecutive-sequence	Medium
0136-single-number	Easy
0153-find-minimum-in-rotated-sorted-array	Medium
0169-majority-element	Easy
0198-house-robber	Medium
0217-contains-duplicate	Easy
0238-product-of-array-except-self	Medium
0322-coin-change	Medium
0347-top-k-frequent-elements	Medium
0605-can-place-flowers	Easy
1391-check-if-there-is-a-valid-path-in-a-grid	Medium
1431-kids-with-the-greatest-number-of-candies	Easy
2515-shortest-distance-to-target-string-in-a-circular-array	Easy

Dynamic Programming

Problem Name	Difficulty
0053-maximum-subarray	Medium
0070-climbing-stairs	Easy
0091-decode-ways	Medium
0119-pascals-triangle-ii	Easy
0198-house-robber	Medium
0322-coin-change	Medium

Bit Manipulation

Problem Name	Difficulty
0136-single-number	Easy
0191-number-of-1-bits	Easy
0231-power-of-two	Easy

Linked List

Problem Name	Difficulty
0002-add-two-numbers	Medium
0021-merge-two-sorted-lists	Easy

Math

Problem Name	Difficulty
0002-add-two-numbers	Medium
0069-sqrtx	Easy
0070-climbing-stairs	Easy
0231-power-of-two	Easy
0412-fizz-buzz	Easy
1071-greatest-common-divisor-of-strings	Easy

Recursion

Problem Name	Difficulty
0002-add-two-numbers	Medium
0021-merge-two-sorted-lists	Easy
0231-power-of-two	Easy

Depth-First Search

Problem Name	Difficulty
0079-word-search	Medium
0098-validate-binary-search-tree	Medium
0104-maximum-depth-of-binary-tree	Easy
1391-check-if-there-is-a-valid-path-in-a-grid	Medium

Breadth-First Search

Problem Name	Difficulty
0104-maximum-depth-of-binary-tree	Easy
0322-coin-change	Medium
1391-check-if-there-is-a-valid-path-in-a-grid	Medium

Union-Find

Problem Name	Difficulty
0128-longest-consecutive-sequence	Medium
1391-check-if-there-is-a-valid-path-in-a-grid	Medium

Matrix

Problem Name	Difficulty
0079-word-search	Medium
1391-check-if-there-is-a-valid-path-in-a-grid	Medium

String

Problem Name	Difficulty
0079-word-search	Medium
0091-decode-ways	Medium
0125-valid-palindrome	Easy
0242-valid-anagram	Easy
0412-fizz-buzz	Easy
0459-repeated-substring-pattern	Easy
1071-greatest-common-divisor-of-strings	Easy
2515-shortest-distance-to-target-string-in-a-circular-array	Easy

Simulation

Problem Name	Difficulty
0412-fizz-buzz	Easy

Hash Table

Problem Name	Difficulty
0001-two-sum	Easy
0128-longest-consecutive-sequence	Medium
0169-majority-element	Easy
0217-contains-duplicate	Easy
0242-valid-anagram	Easy
0347-top-k-frequent-elements	Medium

Divide and Conquer

Problem Name	Difficulty
0053-maximum-subarray	Medium
0169-majority-element	Easy
0191-number-of-1-bits	Easy
0347-top-k-frequent-elements	Medium

Sorting

Problem Name	Difficulty
0015-3sum	Medium
0169-majority-element	Easy
0217-contains-duplicate	Easy
0242-valid-anagram	Easy
0347-top-k-frequent-elements	Medium

Counting

Problem Name	Difficulty
0169-majority-element	Easy
0347-top-k-frequent-elements	Medium

Binary Search

Problem Name	Difficulty
0069-sqrtx	Easy
0153-find-minimum-in-rotated-sorted-array	Medium

String Matching

Problem Name	Difficulty
0459-repeated-substring-pattern	Easy

Greedy

Problem Name	Difficulty
0605-can-place-flowers	Easy

Heap (Priority Queue)

Problem Name	Difficulty
0347-top-k-frequent-elements	Medium

Bucket Sort

Problem Name	Difficulty
0347-top-k-frequent-elements	Medium

Quickselect

Problem Name	Difficulty
0347-top-k-frequent-elements	Medium

Memoization

Problem Name	Difficulty
0070-climbing-stairs	Easy

Prefix Sum

Problem Name	Difficulty
0238-product-of-array-except-self	Medium

Two Pointers

Problem Name	Difficulty
0015-3sum	Medium
0125-valid-palindrome	Easy

Tree

Problem Name	Difficulty
0098-validate-binary-search-tree	Medium
0104-maximum-depth-of-binary-tree	Easy

Binary Search Tree

Problem Name	Difficulty
0098-validate-binary-search-tree	Medium

Binary Tree

Problem Name	Difficulty
0098-validate-binary-search-tree	Medium
0104-maximum-depth-of-binary-tree	Easy

Backtracking

Problem Name	Difficulty
0039-combination-sum	Medium
0079-word-search	Medium