All stories published by Data Science & LeetCode for Kindergarten on December 27, 2020

All Stories published by Data Science & LeetCode for Kindergarten on December 27, 2020

題目:

給定一個linked list，判斷pos的位置有沒有與尾部相連形成一個cycle，有的話return True。

Given head, the head of a linked list, determine if the linked list has a cycle in it.

題目:

判斷句子是否為回文。

Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.

題目:

給定一個array，有一個數字只出現一次，其餘皆出現兩次，找出那個沒有重複的數字。

Given a non-empty array of integers nums, every element appears twice except for one. Find that single one.

題目:

給定一個array，第i個元素代表第i天stock的價格，可以任意買賣次數，但買了之後要賣，也就是下次買進前要先賣出，不能買兩次再賣兩次，必須買賣買賣，找出最大的profit。

Say you have an array prices for which the ith element is the price of a given stock on day i.

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