脸熟西雅图 E4 挂经

Onsite:
Each round is 45 min with 5 min introduction and 5 min of your questions.
Round 1:
37. Sudoku Solver
Round 2:
301. Remove Invalid Parentheses return just 1 possible solution
560. Subarray Sum Equals K
Round 3:
System design. Design a leetcode contest, leadership board system - FAIL
Round 4:
Behavioral questions
102. Binary Tree Level Order Traversal 10 min question. Kind of a stress test.
Round 5:
329. Longest Increasing Path in a Matrix