Skip to content

maiquynhtruong/Leetcode

BranchesTags

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

301 Commits

4-sum-ii.java

4-sum-ii.java

 
 

README.md

README.md

 
 

Roman-to-integer.java

Roman-to-integer.java

 
 

add-and-search-word-data-structure-design.java

add-and-search-word-data-structure-design.java

 
 

add-two-numbers.java

add-two-numbers.java

 
 

array-nesting.java

array-nesting.java

 
 

battleships-in-a-board.java

battleships-in-a-board.java

 
 

best-time-to-buy-and-sell-stocks-ii.java

best-time-to-buy-and-sell-stocks-ii.java

 
 

binary-numbers-with-alternating-bits.cpp

binary-numbers-with-alternating-bits.cpp

 
 

binary-tree-maximum-path-sum.java

binary-tree-maximum-path-sum.java

 
 

binary-tree-paths.java

binary-tree-paths.java

 
 

boundary-of-binary-tree.java

boundary-of-binary-tree.java

 
 

brick-wall.java

brick-wall.java

 
 

bulls-and-cows.java

bulls-and-cows.java

 
 

burst-balloons.

burst-balloons.

 
 

can-I-win.java

can-I-win.java

 
 

climbing-stairs.cpp

climbing-stairs.cpp

 
 

closest-binary-search-tree-value.java

closest-binary-search-tree-value.java

 
 

combination-sum.cpp

combination-sum.cpp

 
 

complex-number-multiplication.java

complex-number-multiplication.java

 
 

concatenated-words.java

concatenated-words.java

 
 

construct-binary-tree-from-inorder-and-postorder-traversal.java

construct-binary-tree-from-inorder-and-postorder-traversal.java

 
 

construct-the-rectangle.java

construct-the-rectangle.java

 
 

contains-duplicate-ii.java

contains-duplicate-ii.java

 
 

contains-duplicate.java

contains-duplicate.java

 
 

continuous-subarray-sum.java

continuous-subarray-sum.java

 
 

convert-BST-to-greater-tree.java

convert-BST-to-greater-tree.java

 
 

copy-node-with-random-pointers.java

copy-node-with-random-pointers.java

 
 

count-of-smaller-numbers-after-self.java

count-of-smaller-numbers-after-self.java

 
 

count-the-repetitions.java

count-the-repetitions.java

 
 

count-univalue-subtrees.java

count-univalue-subtrees.java

 
 

counting-bits.java

counting-bits.java

 
 

course-schedule.java

course-schedule.java

 
 

decode-string.java

decode-string.java

 
 

decode-string.py

decode-string.py

 
 

delete-and-earn.java

delete-and-earn.java

 
 

delete-node-in-a-BST.java

delete-node-in-a-BST.java

 
 

delete-node.java

delete-node.java

 
 

design-a-vending-machine.java

design-a-vending-machine.java

 
 

design-twitter.java

design-twitter.java

 
 

diagonal-traverse.java

diagonal-traverse.java

 
 

distribute-candies.java

distribute-candies.java

 
 

employee-importance.java

employee-importance.java

 
 

encode-and-decode-tinyurl.java

encode-and-decode-tinyurl.java

 
 

encode-string-with-shortest-length.java

encode-string-with-shortest-length.java

 
 

evaluate-division.java

evaluate-division.java

 
 

falling-squares.cpp

falling-squares.cpp

 
 

find-all-duplicates-in-an-array.java

find-all-duplicates-in-an-array.java

 
 

find-all-numbers-disappeared-in-an-array.java

find-all-numbers-disappeared-in-an-array.java

 
 

find-bottom-left-tree-value.java

find-bottom-left-tree-value.java

 
 

find-largest-smaller-key.java

find-largest-smaller-key.java

 
 

find-largest-value-in-each-tree-row.java

find-largest-value-in-each-tree-row.java

 
 

find-leaves-of-binary-tree.java

find-leaves-of-binary-tree.java

 
 

find-leaves-of-binary-tree.py

find-leaves-of-binary-tree.py

 
 

find-median-from-data-stream.java

find-median-from-data-stream.java

 
 

find-minimum-in-rotated-sorted-array.java

find-minimum-in-rotated-sorted-array.java

 
 

find-peak-element.java

find-peak-element.java

 
 

find-the-duplicate-number.java

find-the-duplicate-number.java

 
 

flatten-binary-tree-to-linked-list.java

flatten-binary-tree-to-linked-list.java

 
 

flip-game.java

flip-game.java

 
 

freedom-trail.java

freedom-trail.java

 
 

friend-circles.java

friend-circles.java

 
 

game-of-life.java

game-of-life.java

 
 

generate-parantheses.cpp

generate-parantheses.cpp

 
 

generating-parenthesis.java

generating-parenthesis.java

 
 

hamming-distance.java

hamming-distance.java

 
 

heaters.java

heaters.java

 
 

house-robber.java

house-robber.java

 
 

increasing-subsequences.java

increasing-subsequences.java

 
 

interleaving-strings.java

interleaving-strings.java

 
 

intersection-of-two-arrays-ii.java

intersection-of-two-arrays-ii.java

 
 

island-perimeter.java

island-perimeter.java

 
 

jump-game.cpp

jump-game.cpp

 
 

jump_game.java

jump_game.java

 
 

k-diff-pairs-in-an-array.java

k-diff-pairs-in-an-array.java

 
 

k-smallest-element-in-BST.java

k-smallest-element-in-BST.java

 
 

kill-process.java

kill-process.java

 
 

kth-smallest-element-in-a-bst.java

kth-smallest-element-in-a-bst.java

 
 

largest-number.java

largest-number.java

 
 

letter-combination-of-a-phone-number.cpp

letter-combination-of-a-phone-number.cpp

 
 

linked-list-cycle-ii.java

linked-list-cycle-ii.java

 
 

longest-consecutive-sequence.java

longest-consecutive-sequence.java

 
 

longest-palindromic-subsequence.java

longest-palindromic-subsequence.java

 
 

longest-substring-without-repeating-character.java

longest-substring-without-repeating-character.java

 
 

lowest-common-ancestor-of-a-binary-tree.java

lowest-common-ancestor-of-a-binary-tree.java

 
 

lowest-common-ancestor-of-binary-search-tree.java

lowest-common-ancestor-of-binary-search-tree.java

 
 

lowest-common-ancestor.java

lowest-common-ancestor.java

 
 

matchsticks-to-square.java

matchsticks-to-square.java

 
 

max-chunks-to-sort.java

max-chunks-to-sort.java

 
 

max-consecutive-ones-ii.java

max-consecutive-ones-ii.java

 
 

max-consecutive-ones.java

max-consecutive-ones.java

 
 

max-sub-array.java

max-sub-array.java

 
 

maximum-depth-of-binary-tree.java

maximum-depth-of-binary-tree.java

 
 

maximum-subarray.java

maximum-subarray.java

 
 

maximum-vacation-days.java

maximum-vacation-days.java

 
 

merge-intervals.java

merge-intervals.java

 
 

merge-k-sorted-lists.java

merge-k-sorted-lists.java

 
 

merge-sorted-array.cpp

merge-sorted-array.cpp

 
 

merge-two-sorted-lists.java

merge-two-sorted-lists.java

 
 

min-cost-climbing-stairs.cpp

min-cost-climbing-stairs.cpp

 
 

Repository files navigation

Leetcode

Problems on Leetcode

I made this repo after a failed technical interview with an easy programming question (Game of life). It reminded me of another technical interview with an easy question that I failed. I realized simply taking a class in Algorithms and Data Structures wasn't enough, and that I needed to practice more questions. A few weeks before Chrismast 2016, I set out a goal of doing one problem on Leetcode a day.

I've switched to a more structured way of learning algorithms (with topics and problems on the topic to familiarize myself using Competitive Programming by Steven and Felix Halim). I will still do problems on Leetcode once in a while.

Structure

This repo has a flat structure with no sub directories. For the problems, I tried solving them first, then if stuck I would look at the solution, then I tried to reimplement them.

Lessons learned

The journey in the past 8-9 months has been fun. It taught me discipline. I realized that if I want to be good at something I need to constantly practice it. Sitting down to my laptop everyday and tried to read and understand the problems and created a commit has shaped a habit in my mind. I'm no longer afraid of doing a technical programming question (I still suck at that, though). An author on Quora has said habitual everyday tasks are boring, but they bring me greater rewards in the future. At least, at the end of the day, when I reflect on what I've done today, I'm glad I did something to better myself

I also welcome contributions.

About

Problems solved on Leetcode

Topics

java leetcode programming-challenge leetcode-solutions

Resources

Readme
Activity

Stars

9 stars

Watchers

3 watching

Forks

7 forks
Report repository

Releases

No releases published

Packages

No packages published

Languages