Leetcode-practice

personal practice in JAVA.

No. 6. ZigZag Conversion
No. 7. Reverse Integer
No. 15. 3Sum
No. 19. Remove Nth Node From End of List
No. 23. Merge k Sorted Lists
No. 65. Valid Number
No. 68. Text Justification
No. 71. Simplify Path
No. 102. Binary Tree Level Order Traversal
No. 103. Binary Tree Zigzag Level Order Traversal
No. 119. Pascal's Triangle II
No. 223. Rectangle Area
No. 240. Search a 2D Matrix II
No. 241. Different Ways to Add Parentheses
No. 273. Integer to English Words
No. 290. Word Pattern
No. 299. Bulls and Cows
*No. 327. Count of Range Sum
No. 343. Integer Break
No. 367. Valid Perfect Square
No. 380. Insert Delete GetRandom O(1)
No. 398. Random Pick Index
No. 399. Evaluate Division
No. 437. Path Sum III
No. 420. Strong Password Checker
No. 441. Arranging Coins
No. 448. Find All Numbers Disappeared in an Array
No. 450. Delete Node in a BST