Hi, here’s your problem today. This problem was recently asked by Google:

Given a binary tree, find and return the largest path from root to leaf.

Here’s an example and some starter code:

class Node:
  def __init__(self, value, left=None, right=None):
    self.value = value
    self.left = left
    self.right = right

def largest_path_sum(tree):
  # Fill this in.

tree = Node(1)
tree.left = Node(3)
tree.right = Node(2)
tree.right.left = Node(4)
tree.left.right = Node(5)
#    1
#  /   \
# 3     2
#  \   /
#   5 4
print(largest_path_sum(tree))
# [1, 3, 5]