| 1 |
Pascal's Triangle |
| 2 |
Meeting Rooms |
| 3 |
Reverse Bits |
| 4 |
Cousins in Binary Tree |
| 5 |
Keyboard Row |
| 6 |
Largest Unique Number |
| 7 |
Assign Cookies |
| 8 |
Maximum Depth of N-ary Tree |
| 9 |
Count and Say |
| 10 |
Arranging Coins |
| 11 |
Maximum Number of Balloons |
| 12 |
Construct the rectangle |
| 13 |
Magic Squares In Grid |
| 14 |
Matrix Cells in Distance Order |
| 15 |
1-bit and 2-bit Characters |
| 16 |
Find the difference |
| 17 |
Factorial Trailing Zeroes |
| 18 |
Sentence Similarity |
| 19 |
Largest Number At Least Twice of Others |
| 20 |
Max Area of Island |
| 21 |
Longest Palindrome |
| 22 |
Shortest Word Distance III |
| 23 |
String Compression |
| 24 |
trailing_zeroes |
| 25 |
Greatest Common Divisor of Strings |
| 26 |
Two Sum IV - Input is a BST |
| 27 |
Linked List Cycle |
| 28 |
Delete node in a linked list |
| 29 |
Excel Sheet Column Number |
| 30 |
Pairs of Songs With Total Durations Divisible by 60 |
| 31 |
Remove Linked List Elements |
| 32 |
Single-Row Keyboard |
| 33 |
Missing Number In Arithmetic Progression |
| 34 |
Sum of left leaves |
| 35 |
Design Compressed String Iterator |
| 36 |
Valid Boomerang |
| 37 |
Flip Game |
| 38 |
Available Captures for Rook |
| 39 |
Strobogrammatic Number |
| 40 |
Add to Array-Form of Integer |
| 41 |
Reverse words in a String III |
| 42 |
Lowest Common Ancestor of a Binary Search Tree |
| 43 |
Find Mode in Binary Search Tree |
| 44 |
Number of 1 bits |
| 45 |
Increasing Order Search Tree |
| 46 |
Occurrences After Bigram |
| 47 |
Design HashSet |
| 48 |
Excel Sheet Column Title |
| 49 |
Find All Numbers Disappeared in an Array |
| 50 |
sum_of_two_integers |
| 51 |
Logger Rate Limiter |
| 52 |
Path Sum |
| 53 |
Search Insert Position |
| 54 |
Search in a Binary Search Tree |
| 55 |
Number of Equivalent Domino Pairs |
| 56 |
Jewels and Stones |
| 57 |
Unique Email Addresses |
| 58 |
Roman to Integer |
| 59 |
Count Primes |
| 60 |
Complement of Base 10 Integer |
| 61 |
Maximum Subarray |
| 62 |
contains_duplicates |
| 63 |
Number of Boomerangs |
| 64 |
Valid Parantheses |
| 65 |
remove_duplicates_sorted |
| 66 |
Sum of square numbers |
| 67 |
add_digit |
| 68 |
Letter Case Permutation |
| 69 |
Transpose Matrix |
| 70 |
Binary Number with Alternating Bits |
| 71 |
Power of three |
| 72 |
Remove All Adjacent Duplicates In String |
| 73 |
Longest Continuous Increasing Subsequence |
| 74 |
Palindrome Permutation |
| 75 |
Valid Word Sequence |
| 76 |
Powerful Integers |
| 77 |
Isomorphic Strings |
| 78 |
Uncommon Words from Two Sentences |
| 79 |
Design HashMap |
| 80 |
Backspace String Compare |
| 81 |
Max Consecutive Ones |
| 82 |
Happy Number |
| 83 |
Path Sum III |
| 84 |
Shortest Word Distance |
| 85 |
Binary Prefix Divisible By 5 |
| 86 |
Leaf-Similar Trees |
| 87 |
Nested List Weight Sum |
| 88 |
Guess Number Higher or Lower |
| 89 |
Monotonic Array |
| 90 |
ugly_number |
| 91 |
Number of Days in a Month |
| 92 |
Two Sum III - Data Structure Design |
| 93 |
Island Perimeter |
| 94 |
SqrtX |
| 95 |
Fair Candy Swap |
| 96 |
Heaters |
| 97 |
Trim a Binary Search Tree |
| 98 |
First Bad Version |
| 99 |
Single Number |
| 100 |
Closest Binary Search Tree Value |
| 101 |
Shortest Word Distance II |
| 102 |
Symmetric Tree |
| 103 |
Minimum Absolute Difference |
| 104 |
Valid Palindrome II |
| 105 |
Read N characters Given Read4 |
| 106 |
N-ary Tree Level Order Traversal |
| 107 |
Reverse String II |
| 108 |
Degree of an array |
| 109 |
Find All Anagrams in a String |
| 110 |
Submission Detail |
| 111 |
Binary Tree Paths |
| 112 |
Rotate Array |
| 113 |
Day of the Year |
| 114 |
Set Mismatch |
| 115 |
majority_element |
| 116 |
Number Complement |
| 117 |
power_of_2 |
| 118 |
Can Place Flowers |
| 119 |
Largest Perimeter Triangle |
| 120 |
Relative ranks |
| 121 |
Convert BST to greater tree |
| 122 |
valid_anagrams |
| 123 |
License Key Formatting |
| 124 |
Verifying an Alien Dictionary |
| 125 |
Diameter of Binary Tree |
| 126 |
first_unique_character_in_a_string |
| 127 |
Moving Average from Data Stream |
| 128 |
Diet Plan Performance |
| 129 |
Subdomain Visit Count |
| 130 |
Duplicate Zeros |
| 131 |
Same Tree |
| 132 |
FizzBuzz |
| 133 |
Buddy Strings |
| 134 |
Third Maximum Number |
| 135 |
Pascal's Triangle II |
| 136 |
Word Pattern |
| 137 |
Hamming Distance |
| 138 |
Minimum Distance Between BST Nodes |
| 139 |
Find Words That Can Be Formed by Characters |
| 140 |
Defanging an IP Address |
| 141 |
Reverse Vowels of a String |
| 142 |
Balanced Binary Tree |
| 143 |
How Many Apples Can You Put into the Basket |
| 144 |
String Without AAA or BBB |
| 145 |
Implement Queue using Stacks |
| 146 |
Baseball Game |
| 147 |
range_addition_II |
| 148 |
Design Linked List |
| 149 |
Convert a number to hexadecimal |
| 150 |
Toeplitz Matrix |
| 151 |
N-th Tribonacci Number |
| 152 |
Kth Largest Element in a Stream |
| 153 |
N-ary Tree Preorder Traversal |
| 154 |
Paint House |
| 155 |
Peak Index in a Mountain Array |
| 156 |
Binary Search |
| 157 |
Two Sum Less Than K |
| 158 |
Maximum depth of Binary tree |
| 159 |
Rotting Oranges |
| 160 |
Armstrong Number |
| 161 |
Best time to buy & sell a stock II |
| 162 |
Base 7 |
| 163 |
Longest Univalue Path |
| 164 |
Repeated Substring Pattern |
| 165 |
Maximum Distance in Arrays |
| 166 |
Relative Sort Array |
| 167 |
Unique Number of Occurrences |
| 168 |
Last Stone Weight |
| 169 |
Largest Triangle Area |
| 170 |
Min Cost Climbing Stairs |
| 171 |
Number of Lines To Write String |
| 172 |
Detect Capital |
| 173 |
Two Sum II |
| 174 |
Distance Between Bus Stops |
| 175 |
Sum of Digits in the Minimum Number |
| 176 |
Check If a Number Is Majority Element in a Sorted Array |
| 177 |
Merge two binary trees |
| 178 |
Construct String from Binary Tree |
| 179 |
Merge Sorted Arrays |
| 180 |
N-Repeated Element in Size 2N Array |
| 181 |
Intersection of two arrays II |
| 182 |
Two City Scheduling |
| 183 |
High Five |
| 184 |
Contains Duplicate II |
| 185 |
Intersection of two Linked Lists |
| 186 |
Confusing Number |
| 187 |
Fixed Point |
| 188 |
To Lower Case |
| 189 |
Flipping an Image |
| 190 |
Count Binary Substrings |
| 191 |
Maximum Subarray Sum I |
| 192 |
Reshape the matrix |
| 193 |
Shortest Distance to a Character |
| 194 |
Find Pivot Index |
| 195 |
Add Strings |
| 196 |
Reverse Integer |
| 197 |
Find the Town Judge |
| 198 |
Rotated Digits |
| 199 |
Merge Two Sorted Lists |
| 200 |
Reverse Linked List |
| 201 |
Repeated String Match |
| 202 |
Subtree of Another Tree |
| 203 |
Groups of Special-Equivalent Strings |
| 204 |
Maximum Product of three numbers |
| 205 |
Implement Stack using Queues |
| 206 |
Height Checker |
| 207 |
Two Sum |
| 208 |
Compare Strings by Frequency of the Smallest Character |
| 209 |
Most Common Word |
| 210 |
Binary Tree Level Order Traversal II |
| 211 |
Longest Word in Dictionary |
| 212 |
Min Stack |
| 213 |
Image Smoother |
| 214 |
Shortest Unsorted Continuous Subarray |
| 215 |
Missing Numbers |
| 216 |
Remove Duplicates From Sorted Lists |
| 217 |
Path In Zigzag Labelled Binary Tree |
| 218 |
Max Stack |
| 219 |
Minimum Depth of a Binary Tree |
| 220 |
Split a String in Balanced Strings |
| 221 |
Length of last word |
| 222 |
Second Minimum Node in a binary tree |
| 223 |
Average of levels in a binary tree |
| 224 |
Employee Importance |
| 225 |
Minimum Absolute Difference in BST |
| 226 |
Flood Fill |
| 227 |
Distribute Candies to People |
| 228 |
Ransom Note |
| 229 |
Valid Word Abbrevation |
| 230 |
Student Attendance Record I |
| 231 |
Minimum Moves to Equal an Array Element |
| 232 |
Bold Words in String |
| 233 |
nim_game |
| 234 |
Next Greater Element |
| 235 |
Non-decreasing Array |
| 236 |
remove_element |
| 237 |
Projection Area of 3D Shapes |
| 238 |
Palindrome Number |
| 239 |
Sum of Even Numbers After Queries |
| 240 |
Squares of a Sorted Array |
| 241 |
Judge Route Cycle |
| 242 |
intersection_of_two_arrays |
| 243 |
move_zeroes |
| 244 |
Rotate String |
| 245 |
Binary Gap |
| 246 |
Perfect Number |
| 247 |
House Robber |
| 248 |
Maximize Distance to Closest Person |
| 249 |
Power of four |
| 250 |
Longest Uncommon Subsequence |
| 251 |
Unique Morse Code Words |
| 252 |
Univalued Binary Tree |
| 253 |
Plus One |
| 254 |
Add Binary |
| 255 |
Reverse String |
| 256 |
Middle of the linked list |
| 257 |
K Closest Points to Origin |
| 258 |
Distribute Candies |
| 259 |
Positions of Large Groups |
| 260 |
N-ary Tree Postorder Traversal |
| 261 |
Fibonacci Numbers |
| 262 |
Remove Vowels from a String |
| 263 |
Goat Latin |
| 264 |
Climbing Stairs |
| 265 |
Best time to buy & sell a stock |
| 266 |
Invert a binary tree |
| 267 |
Longest Harmonious Subsequence |
| 268 |
Palindrome Linked List |
| 269 |
Implement strStr |
| 270 |
K-diff Pairs in an Array |
| 271 |
Range Sum Query_Immutable |
| 272 |
Convert Sorted Array To Binary Search Tree |
| 273 |
Number of segments in a String |
| 274 |
Count Substrings with Only One Distinct Letter |
| 275 |
Valid Palindrome |
| 276 |
Binary Tree Tilt |
| 277 |
Valid Perfect Square |
| 278 |
Minimum_index_sum_of_two_lists |
| 279 |
Paint Fence |
| 280 |
Longest Common Prefix |
| 281 |
Array Partition I |