給定一個數值不重複的已排序陣列和目標值，題目要求找出該目標值在這個陣列中的索引位置；若找不到則回傳插入數值的正確排序位置。
Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.
2020-02-12
2020-02-10
LeetCode: Remove Duplicates from Sorted Array
此題要求將輸入的已排序陣列移除重複的項目，必須在同一陣列下操作，最後回傳陣列之長度。
Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length.
2020-02-04
LeetCode: Longest Common Prefix
找出陣列裡元素的重複字元，沒有共同重複字元則回傳空字串。
Write a function to find the longest common prefix string amongst an array of strings.
If there is no common prefix, return an empty string "".
2020-02-04
LeetCode: Two Sum
在一組陣列中找出兩個數，其加總恰等於給定值。 每個數不能被重複使用，且必剛好只有一個解。
Given an array of integers, return indices of the two numbers such that they add up to a specific target.
You may assume that each input would have exactly one solution, and you may not use the same element twice.
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