23 Oct 2025•Python•Medium
Unique Paths II
count paths from top-left to bottom-right with obstacles using dp with space optimization to O(n).
dynamic-programmingmatrix
Leetcode
See my leetcode problem solving notes
I collated all the leetcode problems i solved on here so you can learn from it. You can search for a problem, filter by language or problem type, narrow by difficulty.
Showing 1-10 of 242 problems
Page 1 of 25
23 Oct 2025•C++ / Java•Unknown
Walking Robot Simulation
notes and solution files for walking robot simulation.
c++java
23 Oct 2025•TypeScript•Medium
Wiggle Sort II
rearrange array in wiggle pattern (nums[0] < nums[1] > nums[2] < ...) using sorted interleaving.
arrayssortinggreedy
14 Oct 2025•TypeScript•Medium
Largest Plus Sign
find the largest plus sign order by computing longest consecutive 1s in four directions using dp.
dynamic-programmingmatrix
11 Sept 2025•SQL•Unknown
Movie Rating
notes and solution files for movie rating.
sql
03 Sept 2025•TypeScript•Unknown
Game Theory
notes and solution files for game theory.
typescript
03 Sept 2025•Python•Hard
Zuma Game
find minimum balls needed to clear board using dfs with memoization, trying to form groups of 3+.
dfsbacktrackingmemoization
26 Aug 2025•Python•Hard
Candy
distribute candy to children based on ratings using two-pass greedy approach.
greedyarrays
26 Aug 2025•PHP•Hard
Max Points on a Line
find maximum number of points that lie on the same line using slope calculation and hash map.
hash-tablemathgeometry
17 Aug 2025•C•Easy
Number of Recent Calls
implement RecentCounter using circular queue to count requests within last 3000ms.
queuedesign