題庫

共 810 道題目含解題說明

#	題目	難度	Rating	Topics
1	Two Sum	Easy	1116	arrayhash-table
2	Add Two Numbers	Medium	1395	linked-listmathrecursion
3	Longest Substring Without Repeating Characters	Medium	1533	hash-tablestringsliding-window
4	Median of Two Sorted Arrays	Hard	2028	arraybinary-searchdivide-and-conquer
5	Longest Palindromic Substring	Medium	1581	two-pointersstringdynamic-programming
6	Zigzag Conversion	Medium	1568	string
7	Reverse Integer	Medium	1413	math
8	String to Integer (atoi)	Medium	1545	string
9	Palindrome Number	Easy	1168	math
10	Regular Expression Matching	Hard	2025	stringdynamic-programmingrecursion
11	Container With Most Water	Medium	1704	arraytwo-pointersgreedy
12	Integer to Roman	Medium	1433	hash-tablemathstring
13	Roman to Integer	Easy	1258	hash-tablemathstring
14	Longest Common Prefix	Easy	1170	stringtrie
15	3Sum	Medium	1711	arraytwo-pointerssorting
16	3Sum Closest	Medium	1502	arraytwo-pointerssorting
17	Letter Combinations of a Phone Number	Medium	1460	hash-tablestringbacktracking
18	4Sum	Medium	1639	arraytwo-pointerssorting
19	Remove Nth Node From End of List	Medium	1474	linked-listtwo-pointers
20	Valid Parentheses	Easy	1211	stringstack
21	Merge Two Sorted Lists	Easy	1168	linked-listrecursion
22	Generate Parentheses	Medium	1648	stringdynamic-programmingbacktracking
23	Merge K Sorted Lists	Hard	1893	linked-listdivide-and-conquerheap-priority-queue+1
24	Swap Nodes in Pairs	Medium	1408	linked-listrecursion
25	Reverse Nodes in k-Group	Hard	2011	linked-listrecursion
26	Remove Duplicates from Sorted Array	Easy	1169	arraytwo-pointers
27	Remove Element	Easy	1153	arraytwo-pointers
28	Find the Index of the First Occurrence in a String	Easy	1302	two-pointersstringstring-matching
29	Divide Two Integers	Medium	1645	mathbit-manipulation
30	Substring with Concatenation of All Words	Hard	2039	hash-tablestringsliding-window
31	Next Permutation	Medium	1560	arraytwo-pointers
32	Longest Valid Parentheses	Hard	2118	stringdynamic-programmingstack
33	Search in Rotated Sorted Array	Medium	1625	arraybinary-search
34	Find First and Last Position of Element in Sorted Array	Medium	1483	arraybinary-search
35	Search Insert Position	Easy	1164	arraybinary-search
36	Valid Sudoku	Medium	1422	arrayhash-tablematrix
37	Sudoku Solver	Hard	2313	arrayhash-tablebacktracking+1
39	Combination Sum	Medium	1469	arraybacktracking
40	Combination Sum II	Medium	1562	arraybacktracking
41	First Missing Positive	Hard	1944	arrayhash-table
42	Trapping Rain Water	Hard	2062	arraytwo-pointersdynamic-programming+2
43	Multiply Strings	Medium	1499	mathstringsimulation
44	Wildcard Matching	Hard	2100	stringdynamic-programminggreedy+1
45	Jump Game II	Medium	1618	arraydynamic-programminggreedy
46	Permutations	Medium	1519	arraybacktracking
47	Permutations II	Medium	1574	arraybacktracking
48	Rotate Image	Medium	1407	arraymathmatrix
49	Group Anagrams	Medium	1474	arrayhash-tablestring+1
50	Pow(x, n)	Medium	1460	mathrecursion
51	N-Queens	Hard	1797	arraybacktracking

第 1 頁，共 17 頁

←1 2 3…17 →

題庫

共 810 道題目含解題說明

All Easy Medium Hard

#	題目	難度	Rating	Topics
1	Two Sum	Easy	1116	arrayhash-table
2	Add Two Numbers	Medium	1395	linked-listmathrecursion
3	Longest Substring Without Repeating Characters	Medium	1533	hash-tablestringsliding-window
4	Median of Two Sorted Arrays	Hard	2028	arraybinary-searchdivide-and-conquer
5	Longest Palindromic Substring	Medium	1581	two-pointersstringdynamic-programming
6	Zigzag Conversion	Medium	1568	string
7	Reverse Integer	Medium	1413	math
8	String to Integer (atoi)	Medium	1545	string
9	Palindrome Number	Easy	1168	math
10	Regular Expression Matching	Hard	2025	stringdynamic-programmingrecursion
11	Container With Most Water	Medium	1704	arraytwo-pointersgreedy
12	Integer to Roman	Medium	1433	hash-tablemathstring
13	Roman to Integer	Easy	1258	hash-tablemathstring
14	Longest Common Prefix	Easy	1170	stringtrie
15	3Sum	Medium	1711	arraytwo-pointerssorting
16	3Sum Closest	Medium	1502	arraytwo-pointerssorting
17	Letter Combinations of a Phone Number	Medium	1460	hash-tablestringbacktracking
18	4Sum	Medium	1639	arraytwo-pointerssorting
19	Remove Nth Node From End of List	Medium	1474	linked-listtwo-pointers
20	Valid Parentheses	Easy	1211	stringstack
21	Merge Two Sorted Lists	Easy	1168	linked-listrecursion
22	Generate Parentheses	Medium	1648	stringdynamic-programmingbacktracking
23	Merge K Sorted Lists	Hard	1893	linked-listdivide-and-conquerheap-priority-queue+1
24	Swap Nodes in Pairs	Medium	1408	linked-listrecursion
25	Reverse Nodes in k-Group	Hard	2011	linked-listrecursion
26	Remove Duplicates from Sorted Array	Easy	1169	arraytwo-pointers
27	Remove Element	Easy	1153	arraytwo-pointers
28	Find the Index of the First Occurrence in a String	Easy	1302	two-pointersstringstring-matching
29	Divide Two Integers	Medium	1645	mathbit-manipulation
30	Substring with Concatenation of All Words	Hard	2039	hash-tablestringsliding-window
31	Next Permutation	Medium	1560	arraytwo-pointers
32	Longest Valid Parentheses	Hard	2118	stringdynamic-programmingstack
33	Search in Rotated Sorted Array	Medium	1625	arraybinary-search
34	Find First and Last Position of Element in Sorted Array	Medium	1483	arraybinary-search
35	Search Insert Position	Easy	1164	arraybinary-search
36	Valid Sudoku	Medium	1422	arrayhash-tablematrix
37	Sudoku Solver	Hard	2313	arrayhash-tablebacktracking+1
39	Combination Sum	Medium	1469	arraybacktracking
40	Combination Sum II	Medium	1562	arraybacktracking
41	First Missing Positive	Hard	1944	arrayhash-table
42	Trapping Rain Water	Hard	2062	arraytwo-pointersdynamic-programming+2
43	Multiply Strings	Medium	1499	mathstringsimulation
44	Wildcard Matching	Hard	2100	stringdynamic-programminggreedy+1
45	Jump Game II	Medium	1618	arraydynamic-programminggreedy
46	Permutations	Medium	1519	arraybacktracking
47	Permutations II	Medium	1574	arraybacktracking
48	Rotate Image	Medium	1407	arraymathmatrix
49	Group Anagrams	Medium	1474	arrayhash-tablestring+1
50	Pow(x, n)	Medium	1460	mathrecursion
51	N-Queens	Hard	1797	arraybacktracking

第 1 頁，共 17 頁

←1 2 3…17 →