Problems

Practice data engineering, algorithms, and schema design

#	Title	Tags	Experience
1	Flatten Nested Dictionary	dictionaryrecursion	1-3 YOE	Medium	58%
2	Find K Closest Elements	arraybinary-search	5+ YOE	Hard	67%
3	Shortest Path in Binary Matrix	matrixbfs	5+ YOE	Hard	50%
4	Merge K Sorted Arrays	arrayheap	5+ YOE	Hard	75%
5	Longest Substring with At Least K Repeating Characters	stringsliding-window	5+ YOE	Hard	38%
6	Meeting Rooms II	arraysorting	5+ YOE	Hard	75%
7	Top K Frequent Words	hash-tableheap	5+ YOE	Hard	50%
8	Number of Islands	graphbfs	5+ YOE	Hard	75%
9	Course Schedule	graphtopological-sort	5+ YOE	Hard	100%
10	Find Median from Data Stream	heapsorting	5+ YOE	Hard	43%
11	Sliding Window Maximum	arraysliding-window	5+ YOE	Hard	58%
12	Insert Interval	arraysorting	3-5 YOE	Medium	40%
13	Maximum Product Subarray	arraydynamic-programming	3-5 YOE	Medium	33%
14	Minimum Number of Platforms	arraysorting	3-5 YOE	Medium	80%
15	Rotate Image	arraymatrix	3-5 YOE	Medium	92%
16	Next Permutation	arraytwo-pointers	3-5 YOE	Medium	23%
17	Valid Sudoku	arrayhash-table	3-5 YOE	Medium	48%
18	Kth Largest Element in Array	arraysorting	3-5 YOE	Medium	70%
19	Gas Station	arraygreedy	3-5 YOE	Medium	44%
20	Longest Consecutive Sequence	arrayhash-table	3-5 YOE	Medium	47%
21	Find All Duplicates in an Array	arrayhash-table	3-5 YOE	Medium	65%
22	Jump Game	arraygreedy	3-5 YOE	Medium	46%
23	Maximum Subarray	arraydynamic-programming	3-5 YOE	Medium	55%
24	Set Matrix Zeroes	arraymatrix	3-5 YOE	Medium	68%
25	Spiral Matrix	arraymatrix	3-5 YOE	Medium	47%
26	Longest Repeating Character Replacement	stringsliding-window	3-5 YOE	Medium	67%
27	Longest Harmonious Subsequence	arrayhash-table	1-3 YOE	Easy	67%
28	Find All Numbers Disappeared in Array	arrayhash-table	1-3 YOE	Easy	67%
29	Power of Three	math	1-3 YOE	Easy	46%
30	Excel Sheet Column Number	stringmath	1-3 YOE	Easy	72%

Showing 1–30 of 194

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