LeetCode

463. Island Perimeter

Find the perimeter of the grid lands

Machine Learning

Practical advice for analysis of large, complex data sets

Advice on how to analyze complex and large data sets

LeetCode

988. Smallest String Starting From Leaf

find the lexicographically smallest string starting from the leaf to root node

LeetCode

129. Sum Root to Leaf Numbers

Sum of paths from root to leaf

LeetCode

404. Sum of Left Leaves

Sum of Left Leaves of a binary tree.