001 |
Two Sum |
C++ Java Python |
Note Here |
002 |
Add Two Numbers |
C++ Java Python |
Note Here |
003 |
Longest Substring Without Repeati... |
C++ Java Python |
Note Here |
004 |
Median of Two Sorted Arrays |
C++ Java Python |
Note Here |
005 |
Longest Palindromic Substring |
C++ Java Python |
Note Here |
006 |
ZigZag Conversion |
C++ Java Python |
Note Here |
007 |
Reverse Integer |
C++ Java Python |
Note Here |
008 |
String to Integer |
C++ Java Python |
Note Here |
009 |
Palindrome Number |
C++ Java Python |
Note Here |
010 |
Regular Expression Matching |
C++ Java Python |
Note Here |
011 |
Container With Most Water |
C++ Java Python |
Note Here |
012 |
Integer to Roman |
C++ Java Python |
Note Here |
013 |
Roman to Integer |
C++ Java Python |
Note Here |
014 |
Longest Common Prefix |
C++ Java Python |
Note Here |
015 |
3Sum |
C++ Java Python |
Note Here |
016 |
3Sum Closest |
C++ Java Python |
Note Here |
017 |
Letter Combinations of a Phone Number |
C++ Java Python |
Note Here |
018 |
4Sum |
C++ Java Python |
Note Here |
019 |
Remove Nth Node From End of List |
C++ Python |
Note Here |
020 |
Valid Parentheses |
C++ Java Python |
Note Here |
021 |
Merge Two Sorted Lists |
C++ Python |
Note Here |
022 |
Generate Parentheses |
C++ Java Python |
Note Here |
023 |
Merge k Sorted Lists |
C++ Java Python |
Note Here |
024 |
Swap Nodes in Pairs |
C++ Python |
Note Here |
025 |
Reverse Nodes in k-Group |
C++ Java |
Note Here |
026 |
Remove Duplicates from Sorted Array |
C++ |
Note Here |
027 |
Remove Element |
C++ |
Note Here |
028 |
Implement strStr() |
C++ Python |
Note Here |
029 |
Divide Two Integers |
C++ Python |
Note Here |
030 |
Substring with Concatenation of A... |
C++ Java |
Note Here |
031 |
Next Permutation |
C++ Python |
Note Here |
032 |
Longest Valid Parentheses |
C++ |
Note Here |
033 |
Search in Rotated Sorted Array |
C++ |
Note Here |
034 |
Search for a Range |
C++ Java |
Note Here |
035 |
Search Insert Position |
C++ |
Note Here |
036 |
Valid Sudoku |
C++ |
Note Here |
037 |
Sudoku Solver |
C++ |
Note Here |
038 |
Count and Say |
C++ Python |
Note Here |
039 |
Combination Sum |
C++ |
Note Here |
040 |
Combination Sum II |
C++ |
Note Here |
041 |
First Missing Positive |
C++ |
Coming soon |
042 |
Trapping Rain Water |
C++ |
Coming soon |
043 |
Multiply Strings |
C++ |
Coming soon |
044 |
Wildcard Matching |
C++ |
Coming soon |
045 |
Jump Game II |
C++ |
Coming soon |
046 |
Permutations |
C++ |
Coming soon |
047 |
Permutations II |
C++ |
Coming soon |
048 |
Rotate Image |
C++ |
Coming soon |
049 |
Anagrams |
C++ |
Coming soon |
050 |
Pow(x, n) |
C++ |
Coming soon |
051 |
N-Queens |
C++ Java Python |
Coming soon |
052 |
N-Queens II |
C++ Java Python |
Coming soon |
053 |
Maximum Subarray |
C++ |
Coming soon |
054 |
Spiral Matrix |
C++ |
Coming soon |
055 |
Jump Game |
C++ |
Coming soon |
056 |
Merge Intervals |
C++ |
Coming soon |
057 |
Insert Interval |
C++ |
Coming soon |
058 |
Length of Last Word |
C++ |
Coming soon |
059 |
Spiral Matrix II |
C++ |
Coming soon |
060 |
Permutation Sequence |
C++ |
Coming soon |
061 |
Rotate List |
C++ |
Coming soon |
062 |
Unique Paths |
C++ |
Coming soon |
063 |
Unique Paths II |
C++ |
Coming soon |
064 |
Minimum Path Sum |
C++ |
Coming soon |
065 |
Valid Number |
C++ Java Python |
Coming soon |
066 |
Plus One |
C++ |
Coming soon |
067 |
Add Binary |
C++ |
Coming soon |
068 |
Text Justification |
C++ Java Python |
Note Here |
069 |
Sqrt(x) |
C++ Java Python |
Coming soon |
070 |
Climbing Stairs |
C++ |
Coming soon |
071 |
Simplify Path |
C++ Java Python |
Coming soon |
072 |
Edit Distance |
C++ |
Coming soon |
073 |
Set Matrix Zeroes |
C++ |
Coming soon |
074 |
Search a 2D Matrix |
C++ |
Coming soon |
075 |
Sort Colors |
C++ |
Coming soon |
076 |
Minimum Window Substring |
C++ |
Note Here |
077 |
Combinations |
C++ |
Coming soon |
078 |
Subsets |
C++ Java Python |
Coming soon |
079 |
Word Search |
C++ |
Coming soon |
080 |
Remove Duplicates from Sorted Array II |
C++ |
Coming soon |
081 |
Search in Rotated Sorted Array II |
C++ |
Coming soon |
082 |
Remove Duplicates from Sorted List II |
C++ |
Coming soon |
083 |
Remove Duplicates from Sorted List |
C++ |
Coming soon |
084 |
Largest Rectangle in Histogram |
C++ Java |
Note Here |
085 |
Maximal Rectangle |
C++ Java |
Note Here |
086 |
Partition List |
C++ Java Python |
Coming soon |
087 |
Scramble String |
C++ Java Python |
Note Here |
088 |
Merge Sorted Array |
C++ |
Coming soon |
089 |
Gray Code |
C++ Java Python |
Coming soon |
090 |
Subsets II |
C++ Java Python |
Coming soon |
091 |
Decode Ways |
C++ Java Python |
Coming soon |
092 |
Reverse Linked List II |
C++ |
Coming soon |
093 |
Restore IP Addresses |
C++ Java Python |
Note Here |
094 |
Binary Tree Inorder Traversal |
C++ |
Coming soon |
095 |
Unique Binary Search Trees |
C++ |
Note Here |
096 |
Unique Binary Search Trees II |
C++ |
Note Here |
097 |
Interleaving String |
C++ Java |
Note Here |
098 |
Validate Binary Search Tree |
C++ Java Python |
Note Here |
099 |
Recover Binary Search Tree |
C++ Python |
Note Here |
100 |
Same Tree |
C++ |
Coming soon |
101 |
Symmetric Tree |
C++ |
Coming soon |
102 |
Binary Tree Level Order Traversal |
C++ Python |
Note Here |
103 |
Binary Tree Zigzag Level Order Traversal |
C++ Python |
Note Here |
104 |
Maximum Depth of Binary Tree |
C++ |
Coming soon |
105 |
Construct Binary Tree from Preord... |
C++ |
Note Here |
106 |
Construct Binary Tree from Inorde... |
C++ |
Note Here |
107 |
Binary Tree Level Order Traversal II |
C++ Python |
Note Here |
108 |
Convert Sorted Array to Binary Se... |
C++ |
Note Here |
109 |
Convert Sorted List to Binary Sea... |
C++ Python |
Note Here |
110 |
Balanced Binary Tree |
C++ |
Coming soon |
111 |
Minimum Depth of Binary Tree |
C++ |
Coming soon |
112 |
Path Sum |
C++ |
Coming soon |
113 |
Path Sum II |
C++ Java Python |
Coming soon |
114 |
Flatten Binary Tree to Linked List |
C++ Java |
Note Here |
115 |
Distinct Subsequences |
C++ Python |
Note Here |
116 |
Populating Next Right Pointers in... |
C++ Java Python |
Coming soon |
117 |
Populating Next Right Pointers in... |
C++ Java Python |
Coming soon |
118 |
Pascals Triangle |
C++ |
Coming soon |
119 |
Pascal's Triangle II |
C++ |
Coming soon |
120 |
Triangle |
C++ Java Python |
Coming soon |
121 |
Best Time to Buy and Sell Stock |
C++ Python |
Note Here |
122 |
Best Time to Buy and Sell Stock II |
C++ Python |
Note Here |
123 |
Best Time to Buy and Sell Stock III |
C++ Python |
Note Here |
124 |
Binary Tree Maximum Path Sum |
C++ Python |
Note Here |
125 |
Valid Palindrome |
C++ |
Coming soon |
126 |
Word Ladder |
C++ Python |
Note Here |
127 |
Word Ladder II |
Coming soon |
Coming soon |
128 |
Longest Consecutive Sequence |
Coming soon |
Coming soon |
129 |
Sum Root to Leaf Numbers |
C++ |
Coming soon |
130 |
Surrounded Regions |
C++ |
Note Here |
131 |
Palindrome Partitioning |
C++ Python |
Note Here |
132 |
Palindrome Partitioning II |
C++ Java |
Note Here |
133 |
Clone Graph |
C++ |
Coming soon |
134 |
Gas Station |
C++ |
Note Here |
135 |
Candy |
Coming soon |
Coming soon |
136 |
Single Number |
C++ |
Note Here |
137 |
Single Number II |
C++ |
Coming soon |
138 |
Copy List with Random Pointer |
C++ Java Python |
Note Here |
139 |
Word Break |
C++ Python |
Note Here |
140 |
Word Break II |
Coming soon |
Coming soon |
141 |
Linked List Cycle |
C++ |
Coming soon |
142 |
Linked List Cycle II |
Coming soon |
Coming soon |
143 |
Reorder List |
C++ |
Coming soon |
144 |
Binary Tree Preorder Traversal |
C++ |
Coming soon |
145 |
Binary Tree Postorder Traversal |
C++ |
Coming soon |
146 |
LRU Cache |
C++ Python |
Note Here |
147 |
Insertion Sort List |
C++ |
Coming soon |
148 |
Sort List |
C++ |
Note Here |
149 |
Max Points on a Line |
Coming soon |
Coming soon |
150 |
Evaluate Reverse Polish Notation |
C++ Java Python |
Note Here |
151 |
Reverse Words in a String |
C++ Java Python |
Note Here |
152 |
Maximum Product Subarray |
C++ |
Coming soon |
153 |
Find Minimum in Rotated Sorted Array |
C++ |
Note Here |
154 |
Find Minimum in Rotated Sorted Array II |
C++ Python |
Note Here |
155 |
Min Stack |
C++ |
Note Here |
156 |
Binary Tree Upside Down $ |
Not Buy |
Not Buy |
157 |
Read N Characters Given Read4 $ |
Not Buy |
Not Buy |
158 |
Read N Characters Given Read4 II ... $ |
Not Buy |
Not Buy |
159 |
Longest Substring with At Most Tw... $ |
Not Buy |
Not Buy |
160 |
Intersection of Two Linked Lists |
C++ |
Coming soon |
161 |
One Edit Distance $ |
Not Buy |
Not Buy |
162 |
Find Peak Element |
C++ Java Python |
Coming soon |
163 |
Missing Ranges $ |
Not Buy |
Not Buy |
164 |
Maximum Gap |
C++ |
Note Here |
165 |
Compare Version Numbers |
C++ |
Coming soon |
166 |
Fraction to Recurring Decimal |
C++ |
Note Here |
167 |
Two Sum II - Input array is sorted $ |
Not Buy |
Not Buy |
168 |
Excel Sheet Column Title |
C++ Java Python |
Coming soon |
169 |
Majority Element |
C++ Java Python |
Coming soon |
170 |
Two Sum III - Data structure design $ |
Not Buy |
Not Buy |
171 |
Excel Sheet Column Number |
C++ Java Python |
Coming soon |
172 |
Factorial Trailing Zeroes |
C++ Java Python |
Coming soon |
173 |
Binary Search Tree Iterator |
C++ Python |
Note Here |
174 |
Dungeon Game |
Coming soon |
Coming soon |
175 |
Combine Two Tables |
SQL |
Coming soon |
176 |
Second Highest Salary |
SQL |
Coming soon |
177 |
Nth Highest Salary |
SQL |
Note Here |
178 |
Rank Scores |
SQL |
Note Here |
179 |
Largest Number |
C++ Java Python |
Coming soon |
180 |
Consecutive Numbers |
SQL |
Note Here |
181 |
Employees Earning More Than Their... |
SQL |
Coming soon |
182 |
Duplicate Emails |
SQL |
Coming soon |
183 |
Customers Who Never Order |
SQL |
Note Here |
184 |
Department Highest Salary |
SQL |
Note Here |
185 |
Department Top Three Salaries |
Coming soon |
Coming soon |
186 |
Reverse Words in a String II $ |
Not Buy |
Not Buy |
187 |
Repeated DNA Sequences |
C++ Java Python |
Coming soon |
188 |
Best Time to Buy and Sell Stock IV |
C++ |
Note Here |
189 |
Rotate Array |
C++ |
Note Here |
190 |
Reverse Bits |
C++ Java Python |
Note Here |
191 |
Number of 1 Bits |
C++ Java |
Note Here |
192 |
Word Frequency |
Shell Script |
Note Here |
193 |
Valid Phone Numbers |
Shell Script |
Note Here |
194 |
Transpose File |
Shell Script |
Note Here |
195 |
Tenth Line |
Shell Script |
Note Here |
196 |
Delete Duplicate Emails |
SQL |
Coming soon |
197 |
Rising Temperature |
SQL |
Note Here |
198 |
House Robber |
C++ |
Note Here |
199 |
Binary Tree Right Side View |
C++ Python |
Note Here |
200 |
Number of Islands |
C++ |
Note Here |
201 |
Bitwise AND of Numbers Range |
C++ Python |
Note Here |
202 |
Happy Number |
C++ Python |
Note Here |
203 |
Remove Linked List Elements |
C++ Java Python |
Note Here |
204 |
Count Primes |
C++ |
Coming soon |
205 |
Isomorphic Strings |
C++ Python |
Note Here |
206 |
Reverse Linked List |
C++ |
Coming soon |
207 |
Course Schedule |
C++ Python |
Note Here |
208 |
Implement Trie (Prefix Tree) |
Coming soon |
Coming soon |
209 |
Minimum Size Subarray Sum |
Coming soon |
Coming soon |
210 |
Course Schedule II |
Coming soon |
Coming soon |
211 |
Add and Search Word - Data struct... |
Coming soon |
Coming soon |
212 |
Word Search II |
Coming soon |
Coming soon |
213 |
House Robber II |
Coming soon |
Coming soon |
214 |
Shortest Palindrome |
Coming soon |
Coming soon |
215 |
Kth Largest Element in an Array |
C++ Java Python |
Note Here |
216 |
Combination Sum III |
C++ |
Note Here |
217 |
Contains Duplicate |
C++ Python |
Note Here |
218 |
The Skyline Problem |
Coming soon |
Coming soon |
219 |
Contains Duplicate II |
C++ |
Note Here |
220 |
Contains Duplicate III |
C++ Java |
Note Here |
221 |
Maximal Square |
C++ Python |
Note Here |
222 |
Count Complete Tree Nodes |
C++ Python |
Note Here |
223 |
Rectangle Area |
C++ |
Note Here |
224 |
Basic Calculator |
Coming soon |
Coming soon |
225 |
Implement Stack using Queues |
C++ Java |
Note Here |
226 |
Invert Binary Tree |
C++ Python |
Note Here |
227 |
Basic Calculator II |
Coming soon |
Coming soon |
228 |
Summary Ranges |
C++ Python |
Note Here |
229 |
Majority Element II |
Coming soon |
Coming soon |
230 |
Kth Smallest Element in a BST |
C++ |
Note Here |
231 |
Power of Two |
C++ Python |
Note Here |
232 |
Implement Queue using Stacks |
C++ Python |
Note Here |
233 |
Number of Digit One |
Coming soon |
Coming soon |
234 |
Palindrome Linked List |
C++ Java Python |
Note Here |
235 |
Lowest Common Ancestor of a Binar... |
C++ Python |
Note Here |
236 |
Lowest Common Ancestor of a Binary Tree |
Coming soon |
Coming soon |
237 |
Delete Node in a Linked List |
C++ Python |
Note Here |
238 |
Product of Array Except Self |
Coming soon |
Coming soon |
239 |
Sliding Window Maximum |
C++ Python |
Note Here |
240 |
Search a 2D Matrix II |
Coming soon |
Coming soon |
241 |
Different Ways to Add Parentheses |
Coming soon |
Coming soon |
242 |
Valid Anagram |
C++ Python |
Note Here |
243 |
Shortest Word Distance $ |
Not Buy |
Not Buy |
244 |
Shortest Word Distance II $ |
Not Buy |
Not Buy |
245 |
Shortest Word Distance III $ |
Not Buy |
Not Buy |
246 |
Strobogrammatic Number $ |
Not Buy |
Not Buy |
247 |
Strobogrammatic Number II $ |
Not Buy |
Not Buy |
248 |
Strobogrammatic Number III $ |
Not Buy |
Not Buy |
249 |
Group Shifted Strings $ |
Not Buy |
Not Buy |
250 |
Count Univalue Subtrees $ |
Not Buy |
Not Buy |
251 |
Flatten 2D Vector $ |
Not Buy |
Not Buy |
252 |
Meeting Rooms $ |
Not Buy |
Not Buy |
253 |
Meeting Rooms II $ |
Not Buy |
Not Buy |
254 |
Factor Combinations $ |
Not Buy |
Not Buy |
255 |
Verify Preorder Sequence in Binar... $ |
Not Buy |
Not Buy |
256 |
Paint House $ |
Not Buy |
Not Buy |
257 |
Binary Tree Paths |
C++ Python |
Note Here |
258 |
Add Digits |
C++ Python |
Note Here |