30-Day LeetCoding Challenge Day 21: Leftmost Column with at Least a One

前言

也不知道從什麼時候開始，覺得寫LeetCode是一件很有趣的事。看到官方發起2020四月的30天挑戰賽，想了一下就決定參加了。

30-Day LeetCoding Challenge Day 20: Construct Binary Search Tree from Preorder Traversal

30-Day LeetCoding Challenge Day23: Bitwise AND of Numbers Range

30-Day LeetCoding Challenge Day 14: Perform String Shifts

這一題要我們依輸入執行字串的「偏移」。

30-Day LeetCoding Challenge Day 19: Search in Rotated Sorted Array

好，這題要我們從一個「排序過，但後來又被移動過的」陣列裡找尋特定元素。…

30-Day LeetCoding Challenge Day 18: Minimum Path Sum

30-Day LeetCoding Challenge Day22: Subarray Sum Equals K

30-Day LeetCoding Challenge Day 13: Contiguous Array

30-Day LeetCoding Challenge Day 8: Middle of the Linked List