Find the maximum min path
Problem Given a matrix of integers, there are many paths to take from the top left to the bottom right. For each path, the smallest number »
Perfect Squares
Problem Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n. Examples: Input: »
Counting the path of sums
Description Given a binary tree with nodes containing integer values (positive or negative), how can you count up all the paths that equal to some target »