子寒的博客

英文原题

Let’s say a positive integer is a super-palindrome if it is a palindrome, and it is also the square of a palindrome.

Given two positive integers left and right represented as strings, return the number of super-palindromes integers in the inclusive range [left, right].

英文原题

Given two strings word1 and word2, return the minimum number of steps required to make word1 and word2 the same.

In one step, you can delete exactly one character in either string.

英文原题

Given the head of a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.

For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more than 1.

英文原题

Given an array nums with n integers, your task is to check if it could become non-decreasing by modifying at most one element.

We define an array is non-decreasing if nums[i] <= nums[i + 1] holds for every i (0-based) such that (0 <= i <= n - 2).

英文原题

Given an m x n grid of characters board and a string word, return true if word exists in the grid.

The word can be constructed from letters of sequentially adjacent cells, where adjacent cells are horizontally or vertically neighboring. The same letter cell may not be used more than once.

    这个系列主要介绍我工作后的第一个项目：一个ios上的心率检测app，这个app的第一个版本”remote vital signs”已经在app store上公布，有兴趣的同学可以下下来玩玩。我打算把系列分成几块分别讲述Xcode做app的一些技术上的心得，这期就主要说一下Xcode的一些基本操作。 当前版本12.5

    写这篇文章主要是回顾一些建个人博客的一些细节方法，防止日后需要换环境结果不知道该怎么弄了。