All stories published by Data Science & LeetCode for Kindergarten on December 18, 2020

All Stories published by Data Science & LeetCode for Kindergarten on December 18, 2020

題目:

給一個binary tree 和一個sum的值，去看從root到leaf有沒有一個path的和式等於這個sum值。例如底下範例5,4,11,2的和剛好是sum=22

Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.

題目:

給一個非負的整數，整數代表有多少rows，generate n rows的巴斯卡三角形。

Given a non-negative integer numRows, generate the first numRows of Pascal’s triangle.