Problems

Practice data engineering, algorithms, and schema design

#	Title	Tags	Experience
1	Flatten Nested Dictionary	dictionaryrecursion	1-3 YOE	Medium	60%
2	Find K Closest Elements	arraybinary-search	5+ YOE	Hard	64%
3	Shortest Path in Binary Matrix	matrixbfs	5+ YOE	Hard	57%
4	Merge K Sorted Arrays	arrayheap	5+ YOE	Hard	69%
5	Longest Substring with At Least K Repeating Characters	stringsliding-window	5+ YOE	Hard	47%
6	Meeting Rooms II	arraysorting	5+ YOE	Hard	64%
7	Top K Frequent Words	hash-tableheap	5+ YOE	Hard	35%
8	Number of Islands	graphbfs	5+ YOE	Hard	67%
9	Course Schedule	graphtopological-sort	5+ YOE	Hard	100%
10	Find Median from Data Stream	heapsorting	5+ YOE	Hard	47%
11	Sliding Window Maximum	arraysliding-window	5+ YOE	Hard	69%
12	Insert Interval	arraysorting	3-5 YOE	Medium	42%
13	Maximum Product Subarray	arraydynamic-programming	3-5 YOE	Medium	37%
14	Minimum Number of Platforms	arraysorting	3-5 YOE	Medium	80%
15	Rotate Image	arraymatrix	3-5 YOE	Medium	94%
16	Next Permutation	arraytwo-pointers	3-5 YOE	Medium	28%
17	Valid Sudoku	arrayhash-table	3-5 YOE	Medium	53%
18	Kth Largest Element in Array	arraysorting	3-5 YOE	Medium	73%
19	Gas Station	arraygreedy	3-5 YOE	Medium	47%
20	Longest Consecutive Sequence	arrayhash-table	3-5 YOE	Medium	44%
21	Find All Duplicates in an Array	arrayhash-table	3-5 YOE	Medium	73%
22	Jump Game	arraygreedy	3-5 YOE	Medium	51%
23	Maximum Subarray	arraydynamic-programming	3-5 YOE	Medium	62%
24	Set Matrix Zeroes	arraymatrix	3-5 YOE	Medium	72%
25	Spiral Matrix	arraymatrix	3-5 YOE	Medium	46%
26	Longest Repeating Character Replacement	stringsliding-window	3-5 YOE	Medium	55%
27	Longest Harmonious Subsequence	arrayhash-table	1-3 YOE	Easy	64%
28	Find All Numbers Disappeared in Array	arrayhash-table	1-3 YOE	Easy	66%
29	Power of Three	math	1-3 YOE	Easy	46%
30	Excel Sheet Column Number	stringmath	1-3 YOE	Easy	74%

Showing 1–30 of 194

...