DoorDash LeetCode Questions

78 questions all-time · 7 easy · 45 medium · 26 hard

#	Problem	Difficulty	Frequency	Acceptance
1	Walls and Gates	Medium	100	0.6%
2	Longest Increasing Path in a Matrix	Hard	93	0.6%
3	Binary Tree Maximum Path Sum	Hard	91	0.4%
4	Search Suggestions System	Medium	82	0.7%
5	Maximum Profit in Job Scheduling	Hard	78	0.5%
6	Koko Eating Bananas	Medium	76	0.5%
7	Single-Threaded CPU	Medium	75	0.5%
8	Design File System	Medium	72	0.7%
9	Shortest Distance from All Buildings	Hard	71	0.4%
10	Check if One String Swap Can Make Strings Equal	Easy	67	0.5%
11	Most Profit Assigning Work	Medium	66	0.6%
12	Next Greater Element III	Medium	65	0.4%
13	Design In-Memory File System	Hard	65	0.5%
14	Buddy Strings	Easy	65	0.3%
15	Minimum Number of Steps to Make Two Strings Anagram	Medium	64	0.8%
16	Find K Closest Elements	Medium	64	0.5%
17	Making A Large Island	Hard	62	0.6%
18	Basic Calculator III	Hard	61	0.5%
19	Count Nodes With the Highest Score	Medium	59	0.5%
20	Count All Valid Pickup and Delivery Options	Hard	58	0.6%
21	Interval List Intersections	Medium	55	0.7%
22	Immediate Food Delivery I	Easy	55	0.8%
23	Immediate Food Delivery II	Medium	55	0.6%
24	Subsequence With the Minimum Score	Hard	55	0.3%
25	Mice and Cheese	Medium	55	0.5%
26	Find Nearest Point That Has the Same X or Y Coordinate	Easy	53	0.7%
27	Vertical Order Traversal of a Binary Tree	Hard	51	0.5%
28	Implement Trie (Prefix Tree)	Medium	51	0.7%
29	Course Schedule II	Medium	51	0.6%
30	01 Matrix	Medium	51	0.5%
31	Two Sum	Easy	48	0.6%
32	Next Permutation	Medium	48	0.5%
33	Largest Rectangle in Histogram	Hard	48	0.5%
34	Basic Calculator	Hard	48	0.5%
35	Max Area of Island	Medium	48	0.7%
36	Minimum Size Subarray Sum	Medium	48	0.5%
37	132 Pattern	Medium	48	0.3%
38	Longest Common Subsequence	Medium	46	0.6%
39	Basic Calculator II	Medium	46	0.5%
40	Serialize and Deserialize Binary Tree	Hard	46	0.6%
41	Word Search II	Hard	43	0.4%
42	Best Meeting Point	Hard	43	0.6%
43	Asteroid Collision	Medium	43	0.5%
44	Number of Islands	Medium	39	0.6%
45	Sliding Window Maximum	Hard	39	0.5%
46	Shortest Path to Get Food	Medium	39	0.6%
47	Ways to Make a Fair Array	Medium	39	0.7%
48	Minimize Malware Spread	Hard	39	0.4%
49	Sliding Window Median	Hard	39	0.4%
50	Course Schedule	Medium	39	0.5%
51	Sudoku Solver	Hard	34	0.7%
52	Jump Game	Medium	34	0.4%
53	LRU Cache	Medium	34	0.5%
54	Swim in Rising Water	Hard	34	0.7%
55	Count Sub Islands	Medium	34	0.7%
56	Binary Tree Vertical Order Traversal	Medium	34	0.6%
57	4Sum	Medium	34	0.4%
58	Insert Delete GetRandom O(1)	Medium	34	0.6%
59	Merge k Sorted Lists	Hard	34	0.6%
60	Similar String Groups	Hard	34	0.6%
61	Integer to Roman	Medium	34	0.7%
62	Merge Intervals	Medium	34	0.5%
63	Jump Game II	Medium	27	0.4%
64	Maximum Path Quality of a Graph	Hard	27	0.6%
65	Maximum Gap	Medium	27	0.5%
66	Design Add and Search Words Data Structure	Medium	27	0.5%
67	Number of Visible People in a Queue	Hard	27	0.7%
68	Design Browser History	Medium	27	0.8%
69	LFU Cache	Hard	27	0.5%
70	Group Anagrams	Medium	27	0.7%
71	Brace Expansion	Medium	27	0.7%
72	Range Sum Query 2D - Immutable	Medium	27	0.6%
73	Longest Palindromic Substring	Medium	27	0.4%
74	Roman to Integer	Easy	27	0.7%
75	Find Edges in Shortest Paths	Hard	27	0.5%
76	Rotting Oranges	Medium	27	0.6%
77	Add Two Numbers	Medium	27	0.5%
78	Diameter of Binary Tree	Easy	27	0.7%

How to read this list

The tabs at the top split the questions by how recently people said they were asked in interviews. "Last 30 Days" is the past month, "Last 3 Months" is the past quarter, and so on. "All Time" is every question on record for this company.

Frequency is a score from 0 to 100 for how often a question showed up in that time window. A higher number means it came up more often, so the list starts with the most common questions first. Acceptance is the share of submissions that pass on LeetCode. Click any question to open it on LeetCode.

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