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LeetCode 175 Problems' Solutions (up-to-date)

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LeetCode

LeetCode C Solutions

(Notes: "♥" means you need buy a book from Leetcode)

# Title Solution Difficulty
175 Largest Number C Medium
174 Dungeon Game C Hard
173 Binary Search Tree Iterator C Medium
172 Factorial Trailing Zeroes C Easy
171 Excel Sheet Column Number C Easy
170 Two Sum III - Data structure design ♥ C Easy
169 Majority Element C Easy
168 Excel Sheet Column Title C Easy
167 Two Sum II - Input array is sorted ♥ C Medium
166 Fraction to Recurring Decimal C Medium
165 Compare Version Numbers C Easy
164 Maximum Gap C Hard
163 Missing Ranges ♥ C Medium
162 Find Peak Element C Medium
161 One Edit Distance♥ C Medium
160 Intersection of Two Linked Lists C Easy
159 Longest Substring with At Most Two Distinct Characters ♥ C Hard
158 Read N Characters Given Read4 II - Call multiple times ♥ C Hard
157 Read N Characters Given Read4 ♥ C Easy
156 Binary Tree Upside Down ♥ C Medium
155 Min Stack C Easy
154 Find Minimum in Rotated Sorted Array II C Hard
153 Find Minimum in Rotated Sorted Array C Medium
152 Maximum Product Subarray C Medium
151 Reverse Words in a String C Medium
150 Evaluate Reverse Polish Notation C Medium
149 Max Points on a Line C Hard
148 Sort List C Medium
147 Insertion Sort List C Medium
146 LRU Cache C Hard
145 Binary Tree Postorder Traversal C Hard
144 Binary Tree Preorder Traversal C Medium
143 Reorder List C Medium
142 Linked List Cycle II C Medium
141 Linked List Cycle C Medium
140 Word Break II C Hard
139 Word Break C Medium
138 Copy List with Random Pointer C Hard
137 Single Number II C Medium
136 Single Number C Medium
135 Candy C Hard
134 Gas Station C Medium
133 Clone Graph C Medium
132 Palindrome Partitioning II C Hard
131 Palindrome Partitioning C Medium
130 Surrounded Regions C Medium
129 Sum Root to Leaf Numbers C Medium
128 Longest Consecutive Sequence C Hard
127 Word Ladder II C Hard
126 Word Ladder C Medium
125 Valid Palindrome C Easy
124 Binary Tree Maximum Path Sum C Hard
123 Best Time to Buy and Sell Stock III C Hard
122 Best Time to Buy and Sell Stock II C Medium
121 Best Time to Buy and Sell Stock C Medium
120 Triangle C Medium
119 Pascal's Triangle II C Easy
118 Pascal's Triangle C Easy
117 Populating Next Right Pointers in Each Node II C Hard
116 Populating Next Right Pointers in Each Node C Medium
115 Distinct Subsequences C Hard
114 Flatten Binary Tree to Linked List C Medium
113 Path Sum II C Medium
112 Path Sum C Easy
111 Minimum Depth of Binary Tree C Easy
110 Balanced Binary Tree C Easy
109 Convert Sorted List to Binary Search Tree C Medium
108 Convert Sorted Array to Binary Search Tree C Medium
107 Binary Tree Level Order Traversal II C Easy
106 Construct Binary Tree from Inorder and Postorder Traversal C Medium
105 Construct Binary Tree from Preorder and Inorder Traversal C Medium
104 Maximum Depth of Binary Tree C Easy
103 Binary Tree Zigzag Level Order Traversal C Medium
102 Binary Tree Level Order Traversal C Easy
101 Symmetric Tree C Easy
100 Same Tree C Easy
99 Recover Binary Search Tree C Hard
98 Validate Binary Search Tree C Medium
97 Interleaving String C Hard
96 Unique Binary Search Trees II C Medium
95 Unique Binary Search Trees C Medium
94 Binary Tree Inorder Traversal C Medium
93 Restore IP Addresses C Medium
92 Reverse Linked List II C Medium
91 Subsets II C Medium
90 Decode Ways C Medium
89 Gray Code C Medium
88 Merge Sorted Array C Easy
87 Scramble String C Hard
86 Partition List C Medium
85 Maximal Rectangle C Hard
84 Largest Rectangle in Histogram C Hard
83 Remove Duplicates from Sorted List II C Medium
82 Remove Duplicates from Sorted List C Easy
81 Search in Rotated Sorted Array II C Medium
80 Remove Duplicates from Sorted Array II C Medium
79 Word Search C Medium
78 Subsets C Medium
77 Combinations C Medium
76 Minimum Window Substring C Hard
75 Sort Colors C Medium
74 Search a 2D Matrix C Medium
73 Set Matrix Zeroes C Medium
72 Edit Distance C Hard
71 Simplify Path C Medium
70 Climbing Stairs C Easy
69 Sqrt(x) C Medium
68 Text Justification C Hard
67 Plus One C Easy
66 Valid Number C Easy
65 Add Binary C Easy
64 Merge Two Sorted Lists C Easy
63 Minimum Path Sum C Medium
62 Unique Paths II C Medium
61 Unique Paths C Medium
60 Rotate List C Medium
59 Permutation Sequence C Medium
58 Spiral Matrix II C Medium
57 Length of Last Word C Easy
56 Insert Interval C Hard
55 Merge Intervals C Hard
54 Jump Game C Medium
53 Spiral Matrix C Medium
52 Maximum Subarray C Medium
51 N-Queens II C Hard
50 N-Queens C Hard
49 "Pow(x, n)" C Medium
48 Anagrams C Medium
47 Rotate Image C Medium
46 Permutations II C Hard
45 Permutations C Medium
44 Jump Game II C Hard
43 Wildcard Matching C Hard
42 Multiply Strings C Medium
41 Trapping Rain Water C Hard
40 First Missing Positive C Hard
39 Combination Sum II C Medium
38 Combination Sum C Medium
37 Count and Say C Easy
36 Sudoku Solver C Hard
35 Valid Sudoku C Easy
34 Search Insert Position C Medium
33 Search for a Range C Medium
32 Search in Rotated Sorted Array C Hard
31 Longest Valid Parentheses C Hard
30 Next Permutation C Medium
29 Substring with Concatenation of All Words C Hard
28 Divide Two Integers C Medium
27 Implement strStr() C Easy
26 Remove Element C Easy
25 Remove Duplicates from Sorted Array C Easy
24 Reverse Nodes in k-Group C Hard
23 Swap Nodes in Pairs C Medium
22 Merge k Sorted Lists C Hard
21 Generate Parentheses C Medium
20 Valid Parentheses C Easy
19 Remove Nth Node From End of List C Easy
18 Letter Combinations of a Phone Number C Medium
17 4Sum C Medium
16 3Sum Closest C Medium
15 3Sum C Medium
14 Longest Common Prefix C Easy
13 Roman to Integer C Easy
12 Integer to Roman C Medium
11 Container With Most Water C Medium
10 Regular Expression Matching C Hard
9 Palindrome Number C Easy
8 String to Integer (atoi) C Easy
7 Reverse Integer C Easy
6 ZigZag Conversion C Easy
5 Longest Palindromic Substring C Medium
4 Add Two Numbers C Medium
3 Longest Substring Without Repeating Characters C Medium
2 Median of Two Sorted Arrays C Hard
1 Two Sum C Medium

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LeetCode 175 Problems' Solutions (up-to-date)

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