Ben Huang's Blog

題目給定一個已排序好的linked list，要求將所有重複的node皆刪除，使得每個元素均只出現一次。

Given a sorted linked list, delete all duplicates such that each element appear only once.

爬一個階梯。到頂端總共需走n階，每次你都可以選擇爬1階或2階，問有幾種不同的方法可以爬到階梯頂端?

You are climbing a stair case. It takes n steps to reach to the top.

Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?

Note: Given n will be a positive integer.

給定兩個二位元字串，回傳兩個二位元總和並以二位元字串表示。

Given two binary strings, return their sum (also a binary string).

The input strings are both non-empty and contains only characters 1 or 0.

題目給定一個整數陣列，要求找到一個連續的子陣列，這個子陣列的和是所有子陣列中最大的，並回傳該總和值。

Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum.

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.

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.

回傳兩個已經排序過的linked list的合併，僅能使用原有的linked list回傳。

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.

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 "".

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.