LeetCode

Total Accepted: 12041 Total Submissions: 39526 Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary

Total Accepted: 9875 Total Submissions: 31987 Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root).