This repository contains the solutions and explanations to the algorithm problems on LeetCode. Only medium or above are included. All are written in C++/Python and implemented by myself. The problems attempted multiple times are labelled with hyperlinks.
N/A Kth Smallest Sum In Two Sorted Arrays.java Hard [] Java 111 N/A Longest Common Substring.java Medium [DP, Double Sequence DP, Sequence DP, String] Java 112 N/A Rotate Image.java Medium [Array, Enumeration] Java 113 N/A Backpack III.java Hard [Backpack DP, DP] Java 114 N/A ...
Additionally, it provides methods for creating trees based on given val values and constructing trees from level-order traversal arrays. This class serves as a helpful tool for developers tackling tree-related challenges on LeetCode by offering a standardized approach to tree representation and ...
Merge K Sorted Arrays Set Matrix Zeroes GCD Queries - Greatest Common Divisor Problem Google Contests Competitive Programming Coding Problems Leetcode Problem Solution Count Number of Nodes in a Complete Binary Tree (Leetcode Problem Solution)
【摘要】 截止至今LeetCode题目总量已经有1582题,估计将来每年平均增长300题左右,大部分人肯定是刷不完的,所以得有选择地刷LeetCode。 一种公认的刷题策略是按类别刷题,可是每个类别也有许多题,在... 截止至今LeetCode题目总量已经有1582题,估计将来每年平均增长300题左右,大部分人肯定是刷不完的,所以得有选择地...
https://leetcode.com/problems/combination-sum-iv/ Note: The combination sum IV in leetcode shares the same DP model and solution with this kind of Backpack problem. publicclassSolution {publicintcombinationSum4(int[] nums,inttarget) {int[] dp =newint[target+1];//how to undestand dp[0]...
There are only lowercase characters in the two strings, and there may be repeated characters;The string key must be spelled out by rotating the string ring. Source: LeetCodeLink: https://leetcode-cn.com/problems/freedom-trail The copyright belongs to Lingkou Network. For commercial ...
If the problem was on a random array instead of necklace, the answer is easy to derive. Its (n^k-(n-1)^k)/(n^k) where k is size of array. Now, answer of random array is basically sum of answer over all divisors for random aperiodic arrays. So, we apply mobius inversion and ...
Hacckerank, LeetCode, GeeksForGeeks (GFG), and Codeforces are popular platforms that offer a vast collection of programming problems to enhance skills. However, with the huge content of DSA available, it is challenging for users to identify which one among all to focus on after going through ...
N/A Largest Rectangle in Histogram.java Hard [Array, Monotonous Stack, Stack] Java 280 [lint] [lint]. Merge k Sorted Arrays.java Medium [Heap, MinHeap, PriorityQueue] O(nlogk) O(k) Java 281 [lint] [lint]. Segment Tree Build II.java Medium [Binary Tree, Divide and Conquer, Lint, ...