| 94 |
Binary Tree Inorder Traversal |
Easy |
|
solution |
java, py |
Jun 29, 2024 |
| 98 |
Validate Binary Search Tree |
Medium |
B75, N150 |
solution |
c |
Jun 23, 2024 |
| 100 |
Same Tree |
Easy |
B75, N150 |
solution |
py |
Jul 03, 2024 |
| 104 |
Maximum Depth of Binary Tree |
Easy |
B75, N150 |
solution |
py |
Jul 04, 2024 |
| 110 |
Balanced Binary Tree |
Easy |
N150 |
solution |
py |
Jul 04, 2024 |
| 111 |
Minimum Depth of Binary Tree |
Easy |
|
solution |
c, java |
Jun 07, 2024 |
| 112 |
Path Sum |
Easy |
|
solution |
py |
Jul 03, 2024 |
| 113 |
Path Sum II |
Medium |
|
solution |
py |
Jul 03, 2024 |
| 114 |
Flatten Binary Tree to Linked List |
Medium |
|
solution |
c, py |
Jun 11, 2024 |
| 124 |
Binary Tree Maximum Path Sum |
Hard |
B75, N150 |
solution |
py |
Jul 04, 2024 |
| 129 |
Sum Root to Leaf Numbers |
Medium |
|
solution |
py |
Jun 07, 2024 |
| 145 |
Binary Tree Postorder Traversal |
Easy |
Daily |
solution |
py |
Aug 25, 2024 |
| 199 |
Binary Tree Right Side View |
Medium |
N150 |
solution |
cpp, java |
Jul 04, 2024 |
| 200 |
Number of Islands |
Medium |
B75, N150 |
solution |
py |
Jun 17, 2024 |
| 211 |
Design Add and Search Words Data Structure |
Medium |
B75, N150 |
solution |
py |
Jun 27, 2024 |
| 226 |
Invert Binary Tree |
Easy |
B75, N150 |
solution |
py |
Jul 03, 2024 |
| 230 |
Kth Smallest Element in a BST |
Medium |
B75, N150 |
solution |
py |
Jun 29, 2024 |
| 235 |
Lowest Common Ancestor of a Binary Search Tree |
Medium |
B75, N150 |
solution |
py |
Jul 04, 2024 |
| 236 |
Lowest Common Ancestor of a Binary Tree |
Medium |
B75 |
solution |
py |
Jul 15, 2024 |
| 272 |
Closest Binary Search Tree Value II |
Hard |
|
solution |
py |
Jul 01, 2024 |
| 314 |
Binary Tree Vertical Order Traversal |
Medium |
|
solution |
py |
Jun 12, 2024 |
| 339 |
Nested List Weight Sum |
Medium |
|
solution |
c, py |
Jul 02, 2024 |
| 341 |
Flatten Nested List Iterator |
Medium |
|
solution |
java |
Jul 02, 2024 |
| 364 |
Nested List Weight Sum II |
Medium |
|
solution |
java, py |
Jul 02, 2024 |
| 366 |
Find Leaves of Binary Tree |
Medium |
|
solution |
py |
Jun 12, 2024 |
| 419 |
Battleships in a Board |
Medium |
|
solution |
c, py |
Jun 24, 2024 |
| 426 |
Convert Binary Search Tree to Sorted Doubly Linked List |
Medium |
|
solution |
py |
Jun 12, 2024 |
| 430 |
Flatten a Multilevel Doubly Linked List |
Medium |
|
solution |
cpp, java |
Jun 27, 2024 |
| 431 |
Encode N-ary Tree to Binary Tree |
Hard |
|
solution |
java, py |
Jun 28, 2024 |
| 437 |
Path Sum III |
Medium |
|
solution |
py |
Jul 03, 2024 |
| 513 |
Find Bottom Left Tree Value |
Medium |
|
solution |
java |
Jul 03, 2024 |
| 543 |
Diameter of Binary Tree |
Easy |
N150 |
solution |
c, java, py |
Jun 03, 2024 |
| 559 |
Maximum Depth of N-ary Tree |
Easy |
|
solution |
py |
Sep 24, 2024 |
| 565 |
Array Nesting |
Medium |
|
solution |
py |
Jul 02, 2024 |
| 572 |
Subtree of Another Tree |
Easy |
B75, N150 |
solution |
py |
Jun 03, 2024 |
| 590 |
N-ary Tree Postorder Traversal |
Easy |
Daily |
solution |
py |
Aug 26, 2024 |
| 606 |
Construct String from Binary Tree |
Medium |
|
solution |
java, py |
Aug 04, 2024 |
| 637 |
Average of Levels in Binary Tree |
Easy |
|
solution |
py |
Jul 04, 2024 |
| 653 |
Two Sum IV - Input is a BST |
Easy |
|
solution |
py |
Jul 31, 2024 |
| 662 |
Maximum Width of Binary Tree |
Medium |
|
solution |
py |
Oct 28, 2024 |
| 663 |
Equal Tree Partition |
Medium |
|
solution |
py |
Jun 17, 2024 |
| 666 |
Path Sum IV |
Medium |
Weekly Premium |
solution |
py |
Jul 03, 2024 |
| 676 |
Implement Magic Dictionary |
Medium |
|
solution |
py |
Jun 27, 2024 |
| 687 |
Longest Univalue Path |
Medium |
|
solution |
py |
Jul 03, 2024 |
| 690 |
Employee Importance |
Medium |
|
solution |
java |
Jul 02, 2024 |
| 695 |
Max Area of Island |
Medium |
N150 |
solution |
c |
Jun 24, 2024 |
| 743 |
Network Delay Time |
Medium |
N150 |
solution |
java, py |
Jul 28, 2024 |
| 863 |
All Nodes Distance K in Binary Tree |
Medium |
|
solution |
py |
Jun 26, 2024 |
| 938 |
Range Sum of BST |
Easy |
|
solution |
js, py |
Jul 26, 2024 |
| 951 |
Flip Equivalent Binary Trees |
Medium |
Daily |
solution |
py |
Oct 24, 2024 |
| 959 |
Regions Cut By Slashes |
Medium |
Daily |
solution |
py |
Aug 10, 2024 |
| 979 |
Distribute Coins in Binary Tree |
Medium |
|
solution |
py |
Jul 26, 2024 |
| 987 |
Vertical Order Traversal of a Binary Tree |
Hard |
|
solution |
py |
Jun 12, 2024 |
| 993 |
Cousins in Binary Tree |
Easy |
|
solution |
py |
Jul 04, 2024 |
| 1020 |
Number of Enclaves |
Medium |
|
solution |
py |
Jun 26, 2024 |
| 1026 |
Maximum Difference Between Node and Ancestor |
Medium |
|
solution |
py |
Jun 23, 2024 |
| 1028 |
Recover a Tree From Preorder Traversal |
Hard |
|
solution |
py |
Jul 01, 2024 |
| 1038 |
Binary Search Tree to Greater Sum Tree |
Medium |
Daily |
solution |
c |
Jun 26, 2024 |
| 1110 |
Delete Nodes And Return Forest |
Medium |
Daily |
solution |
py |
Jul 17, 2024 |
| 1161 |
Maximum Level Sum of a Binary Tree |
Medium |
|
solution |
py |
Jul 17, 2024 |
| 1233 |
Remove Sub-Folders from the Filesystem |
Medium |
Daily |
solution |
py |
Jun 28, 2024 |
| 1254 |
Number of Closed Islands |
Medium |
|
solution |
py |
Jun 26, 2024 |
| 1302 |
Deepest Leaves Sum |
Medium |
|
solution |
c, js, py |
Jun 07, 2024 |
| 1305 |
All Elements in Two Binary Search Trees |
Medium |
|
solution |
java |
Jun 24, 2024 |
| 1315 |
Sum of Nodes with Even-Valued Grandparent |
Medium |
|
solution |
py |
Jun 12, 2024 |
| 1325 |
Delete Leaves With a Given Value |
Medium |
|
solution |
py |
Aug 22, 2024 |
| 1367 |
Linked List in Binary Tree |
Medium |
Daily |
solution |
py |
Sep 07, 2024 |
| 1372 |
Longest ZigZag Path in a Binary Tree |
Medium |
|
solution |
py |
Jul 05, 2024 |
| 1376 |
Time Needed to Inform All Employees |
Medium |
|
solution |
py |
Oct 26, 2024 |
| 1382 |
Balance a Binary Search Tree |
Medium |
|
solution |
py |
Jun 29, 2024 |
| 1448 |
Count Good Nodes in Binary Tree |
Medium |
N150 |
solution |
java |
Jul 04, 2024 |
| 1457 |
Pseudo-Palindromic Paths in a Binary Tree |
Medium |
|
solution |
py |
Jul 05, 2024 |
| 1490 |
Clone N-ary Tree |
Medium |
|
solution |
java, py |
Jun 02, 2024 |
| 1522 |
Diameter of N-Ary Tree |
Medium |
|
solution |
py |
Jul 03, 2024 |
| 1530 |
Number of Good Leaf Nodes Pairs |
Medium |
Daily |
solution |
py |
Jul 18, 2024 |
| 1568 |
Minimum Number of Days to Disconnect Island |
Hard |
Daily |
solution |
py |
Aug 11, 2024 |
| 1660 |
Correct a Binary Tree |
Medium |
|
solution |
py |
Jun 27, 2024 |
| 1676 |
Lowest Common Ancestor of a Binary Tree IV |
Medium |
|
solution |
py |
Jun 29, 2024 |
| 1740 |
Find Distance in a Binary Tree |
Medium |
Weekly Premium |
solution |
py |
Jul 15, 2024 |
| 1743 |
Restore the Array From Adjacent Pairs |
Medium |
|
solution |
py |
Jun 27, 2024 |
| 1858 |
Longest Word With All Prefixes |
Medium |
Weekly Premium |
solution |
py |
Jun 29, 2024 |
| 1905 |
Count Sub Islands |
Medium |
Daily |
solution |
py |
Jun 24, 2024 |
| 1973 |
Count Nodes Equal to Sum of Descendants |
Medium |
|
solution |
c |
Jun 23, 2024 |
| 1992 |
Find All Groups of Farmland |
Medium |
|
solution |
java, py |
Jun 24, 2024 |
| 2096 |
Step-By-Step Directions From a Binary Tree Node to Another |
Medium |
Daily |
solution |
py |
Jul 16, 2024 |
| 2192 |
All Ancestors of a Node in a Directed Acyclic Graph |
Medium |
Daily |
solution |
java, py |
Jun 29, 2024 |
| 2265 |
Count Nodes Equal to Average of Subtree |
Medium |
|
solution |
js, py |
Jun 07, 2024 |
| 2385 |
Amount of Time for Binary Tree to Be Infected |
Medium |
|
solution |
py |
Jun 26, 2024 |
| 2415 |
Reverse Odd Levels of Binary Tree |
Medium |
|
solution |
py |
Jun 23, 2024 |
| 2458 |
Height of Binary Tree After Subtree Removal Queries |
Hard |
Daily |
solution |
py |
Oct 26, 2024 |
| 3157 |
Find the Level of Tree with Minimum Sum |
Medium |
|
solution |
py |
Jul 05, 2024 |
| 3249 |
Count the Number of Good Nodes |
Medium |
|
solution |
py |
Aug 12, 2024 |