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这是个开心的题目，因为既可以自己翻译，代码又好写ヾ(๑╹◡╹)ﾉ" The i’th Fibonacci number f(i) is recursively defined in the following way: • f(0) = 0 and f(1) = 1 • f(i + 2) = f(i 阅读全文
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一道简单的树形DP送给你。 A couple of years ago, a new world wide crisis started, leaving many people with economical problems. Some workers of a particular compa 阅读全文
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看过离散数学上的证明。 也在知乎上搜过。 还有刘未鹏关于停机问题的那篇的博客http://mindhacks.cn/2006/10/15/cantor-godel-turing-an-eternal-golden-diagonal/ 基本都是文字加代码论述，但我始终有几个问题没太想明白，感觉证明得牵 阅读全文
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今天带来一个简单的线性结构上的DP，与上次的照明系统（UVA11400）是同一种类型题，便于大家类比、总结、理解，但难度上降低了。 We say a sequence of characters is a palindrome if it is the same written forwards a 阅读全文
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You are given the task to design a lighting system for a huge conference hall. After doing a lot of calculation and sketching, you have figured out the 阅读全文
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2018/8/17 农历 七月初七 今天这个特殊的日子，不知道各位算友都过得怎么样~ 适逢七夕，写算法题当然是众汪所归啊！所以今天，我们带来了一道以七夕为背景的题目。 题目：七夕祭（BZOJ3032有权限，可在JoyOI和CodeVS上查找提交） 题目背景： 七夕节因牛郎织女的传说而被扣上了「情人节 阅读全文
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https://cn.vjudge.net/ Virtual Judge并不是常规的Online Judge平台，他通过爬取其他OJ的题目，让我们可以直接在VJ上查找并提交各种OJ的题目，然后将我们的题目通过他的账号（比如你在cf上会看到用户名vj1、vj2……在HDU上会看到张翼德、马孟起……）在 阅读全文
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上一次紫芝详细地介绍了动态规划中的经典问题LIS，今天我们抽出一个类似思想的简单题目进行实践练习。 The Tower of Babylon（巴比伦塔） Perhaps you have heard of the legend of the Tower of Babylon. Nowadays ma 阅读全文
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Some of the secret doors contain a very interesting word puzzle. The team of archaeologists has to solve it to open that doors. Because there is no ot 阅读全文
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John has n tasks to do. Unfortunately, the tasks are not independent and the execution of one task is only possible if other tasks have already been e 阅读全文