Leetcode-solutions

Solutions for leetcode/lintcode problems

Problems

Name	Difficulty	Link
Remove Duplication from sorted list	Easy	https://leetcode.com/problems/remove-duplicates-from-sorted-list/
Maximum subarray	Easy	https://leetcode.com/problems/maximum-subarray/
Valid Palindrome	Easy	https://leetcode.com/problems/valid-palindrome/
Largest Time for given digits	Easy	https://leetcode.com/problems/largest-time-for-given-digits/
=	Is Subsequence	Easy
Design Hashset	Easy	https://leetcode.com/problems/design-hashset/
Search In a Binary Search Tree	Easy	https://leetcode.com/problems/search-in-a-binary-search-tree/
Search Insert Position	Easy	https://leetcode.com/problems/search-insert-position/
Power Of Two	Easy	https://leetcode.com/problems/power-of-two/
Merge Two sorted Lists	Easy	https://leetcode.com/problems/merge-two-sorted-lists/
Remove Linked List Elements	Easy	https://leetcode.com/problems/remove-linked-list-elements/
subtree of another tree	Easy	https://leetcode.com/problems/subtree-of-another-tree/
Single Number	Easy	https://leetcode.com/problems/single-number/
Happy Number	Easy	https://leetcode.com/problems/happy-number/
Move Zeroes	Easy	https://leetcode.com/problems/move-zeroes/
Middle of the linkedlist	Easy	https://leetcode.com/problems/middle-of-the-linked-list/
Backspace String Compare	Easy	https://leetcode.com/problems/backspace-string-compare/
Min stack	Easy	https://leetcode.com/problems/min-stack/
Diameter of Binary Tree	Easy	https://leetcode.com/problems/diameter-of-binary-tree/
Last Stone Weight	Easy	https://leetcode.com/problems/last-stone-weight/
Insert Delete GetRandom in O(1)	Medium	https://leetcode.com/problems/insert-delete-getrandom-o1/
Binary Tree inorder Traverse	Medium	https://leetcode.com/problems/binary-tree-inorder-traversal/
Search Suggestions System	Medium	https://leetcode.com/problems/search-suggestions-system/
Search a 2D Matrix II	Medium	https://leetcode.com/problems/search-a-2d-matrix-ii/
Spireal Matrix II	Medium	https://leetcode.com/problems/spiral-matrix-ii/
Design a Stack With Increment Operation	Medium	https://leetcode.com/problems/design-a-stack-with-increment-operation/
Minimum Number of Steps to Make Two Strings Anagram	Medium	https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram/
Word Break	Medium	https://leetcode.com/problems/word-break/
Partition Labels	Medium	https://leetcode.com/problems/partition-labels/
Sort an Array	Medium	https://leetcode.com/problems/sort-an-array/
best time to buy & sell stock II	Easy	https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/
group Anagrams	Medium	https://leetcode.com/problems/group-anagrams/
Contiguous Array	Medium	https://leetcode.com/problems/contiguous-array/
Surrounded Regions	Medium	https://leetcode.com/problems/surrounded-regions/
Word Break II	Hard	https://leetcode.com/problems/word-break-ii/
Product of Array Except Self	Medium	https://leetcode.com/problems/product-of-array-except-self/
Sort Colors	Medium	https://leetcode.com/problems/sort-colors/
Number of islands	Medium	https://leetcode.com/problems/number-of-islands/
Minimum Path Sum	Medium	https://leetcode.com/problems/minimum-path-sum/
Search in Rotated Sorted Array	Medium	https://leetcode.com/problems/search-in-rotated-sorted-array/
Binary Search tree from preorder Traversal	Medium	https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal/
Subarray sum equals k	Medium	https://leetcode.com/problems/subarray-sum-equals-k/
BitWise And of Numbers Range	Medium	https://leetcode.com/problems/bitwise-and-of-numbers-range/
LRU Cache	Medium	https://leetcode.com/problems/lru-cache/
Jump Game	Medium	https://leetcode.com/problems/jump-game/
Longest Common Subsequence	Medium	https://leetcode.com/problems/longest-common-subsequence/
Cheapest Flights Within K Stops	Medium	https://leetcode.com/problems/cheapest-flights-within-k-stops/
Maximal Square	Medium	https://leetcode.com/problems/maximal-square/
Binary Tree Maximum Path Sum	Hard	https://leetcode.com/problems/binary-tree-maximum-path-sum/
First Bad Version	Easy	https://leetcode.com/problems/first-bad-version/
jewels And Stones	Easy	https://leetcode.com/problems/jewels-and-stones/
Ransom Note	Easy	https://leetcode.com/problems/ransom-note/
Number Complement	Easy	https://leetcode.com/problems/number-complement/
First Unique Character in a String	Easy	https://leetcode.com/problems/first-unique-character-in-a-string/
Majority Element	Easy	https://leetcode.com/problems/majority-element/
Cousins in binary tree	Easy	https://leetcode.com/problems/cousins-in-binary-tree/
Check If it a Straight line	Easy	https://leetcode.com/problems/check-if-it-is-a-straight-line/
Valid Perfect Square	Easy	https://leetcode.com/problems/valid-perfect-square/
Find the town judge	Easy	https://leetcode.com/problems/find-the-town-judge/
Flood fill	Easy	https://leetcode.com/problems/flood-fill/
Single Element in a sorted Array	Medium	https://leetcode.com/problems/single-element-in-a-sorted-array/
Remove K Digits	Medium	https://leetcode.com/problems/remove-k-digits/
Implement Trie	Medium	https://leetcode.com/problems/implement-trie-prefix-tree/
Maximum Sum Circular Subarray	Medium	https://leetcode.com/problems/maximum-sum-circular-subarray/
Odd Even LinkedList	Medium	https://leetcode.com/problems/odd-even-linked-list/
Find All Anagrams in a string	Medium	https://leetcode.com/problems/find-all-anagrams-in-a-string/
Permutation in string	Medium	https://leetcode.com/problems/permutation-in-string/
Online Stock Span	Medium	https://leetcode.com/problems/online-stock-span/
Kth Smallest Element In a BST	Medium	https://leetcode.com/problems/kth-smallest-element-in-a-bst/
Count Square SubMatrices with all ones	Medium	https://leetcode.com/problems/count-square-submatrices-with-all-ones/
Sort Characters By Frequency	Medium	https://leetcode.com/problems/sort-characters-by-frequency/
Interval List Intersection	Medium	https://leetcode.com/problems/interval-list-intersections/
Uncrossed Lines	Medium	https://leetcode.com/problems/uncrossed-lines/
Possible Bipartition	Medium	https://leetcode.com/problems/possible-bipartition/
Counting Bits	Medium	https://leetcode.com/problems/counting-bits/
Course Schedule	Medium	https://leetcode.com/problems/course-schedule/
K Closest Points to origin	Medium	https://leetcode.com/problems/k-closest-points-to-origin/
Edit Distance	Hard	https://leetcode.com/problems/edit-distance/
Invert Binary Tree	Easy	https://leetcode.com/problems/invert-binary-tree/
Delete Node in a Linked List	Easy	https://leetcode.com/problems/delete-node-in-a-linked-list/
Two City Scheduling	Easy	https://leetcode.com/problems/two-city-scheduling/
Reverse String	Easy	https://leetcode.com/problems/reverse-string/
Random Pick With Weight	Medium	https://leetcode.com/problems/random-pick-with-weight/
Queue Reconstruction by Height	Medium	https://leetcode.com/problems/queue-reconstruction-by-height/

Sql

Name	Difficulty	Link
Update Salary	Easy	https://leetcode.com/problems/swap-salary/
Reformat Department table	Easy	https://leetcode.com/problems/reformat-department-table/
Not boring movies	Easy	https://leetcode.com/problems/not-boring-movies/
Duplicate Emails	Easy	https://leetcode.com/problems/duplicate-emails/
Combine Two Tables	Easy	https://leetcode.com/problems/combine-two-tables/
Employees Earning More Than Their Managers	Easy	https://leetcode.com/problems/employees-earning-more-than-their-managers/
Customers Who Never Order	Easy	https://leetcode.com/problems/customers-who-never-order/
Delete Duplicate Emails	Easy	https://leetcode.com/problems/delete-duplicate-emails/
Rising Temperature	Easy	https://leetcode.com/problems/rising-temperature/
Classes more than 5 students	Easy	https://leetcode.com/problems/classes-more-than-5-students/
Second Highest Salary	Easy	https://leetcode.com/problems/second-highest-salary/
Exchange Seats	Medium	https://leetcode.com/problems/exchange-seats/