引言

活动链接：https://eng.unimelb.edu.au/students/eng-and-it-calendar/upcoming-events/industry/hackathon-festival-2025

前言

以下的题目很多都是真题（有CSP或者NOIP标识的），我全部点开看过，简单想了想做法，然后按照获得70分的做法的实现难度分类。

如何理解题目的难度

洛谷上标注的题目的难度是针对获得100分的做法进行评价的，但事实上我们并不需要每道题都获得100分。题目分为很多不同的数据点，包括不同的数据范围还有特殊限制。举个例子：

My First Post Content.

My First Post Content. This article is a test to showcase various formatting options including mathematical equations, code blocks, blockquotes, and tables.

Headings and Paragraphs

Here’s a sample of different heading levels to check their styling.

Heading 1

This is H1. It won’t be contained in “Content”. (Not recommended)

Heading 2

This is H2.

Heading 3

This is H3.

Heading 3

This is H3.

Heading 3

This is H3.

Heading 4

This is H4. (Not recommended)

My First Post Content.