Xi Ruoyao

PhD Student

School of Space Science and Technology

Laboratory of ICPC

Biography

Xi Ruoyao is just a trivial graduated student of Xidian University.

Interests

Physics
Competitive Programming

Education

BEng in Aerospace Science and Technology, 2017

Recent Publications

Quan Lei, Xie Kai, Xi Ruoyao, Liu Yan (2017). Compressive light beam induced current sensing for fast defect detection in photovoltaic cells. In Solar Energy.

Recent Posts

Codeforces Round #754 (Div. 2)

比赛链接 A - A.M. Deviation 题意：给你三个数 $a_1, a_2, a_3$，每次你可以给 $a_i$ 加 $1$，$a_j$ 减 $1$。要求最小化 $$d(a_1, a_2, a_3) = |a_1 + a_3 - 2 \cdot a_2|$$ 显然，在题目给定的

Xi Ruoyao

Last updated on Nov 13, 2021 3 min read

2021 杭电多校 (“中超联赛”) 第五场

大概过程：开场签 1006，同时王老师签了 1003 然后写 1007 错了 $114514$ 发，最后王老师改对了然后 1002 一开始觉得是压缩存储矩阵然后快速幂，发现事 $\mathcal{O}(n^4 \log L)$ 的。突然发

Xi Ruoyao

Last updated on Aug 11, 2021 2 min read

2021 杭电多校 (“中超联赛”) 第四场

大概过程：开场读 K，然后发现不可做然后读了 F，就是个最小树形图，但是要求 $10^5$ 点还要输出以每个点为根的答案…… 然后读了 I，发现事签到题，就去写，

Xi Ruoyao

Last updated on Jul 29, 2021 2 min read

2021 牛客多校第 4 场

I. Inverse Pair 题意输入一个数组，保证里面是一个排列，选择一些数组元素给他加 $1$，最小化操作后的逆序对数。做法因为是一个排列，而且只能加 $1$，增加

Xi Ruoyao

Last updated on Jul 26, 2021 2 min read

2021 牛客多校第 3 场

F. 24dian 题意输入 $n$ 和 $m$，输出所有从扑克牌堆抽 $n$ 张牌 ($13^n$ 种情况) 后，获得的牌能且仅能通过中间过程有分数的四则运算得到数 $m$ 的情况。 $1 \leq n \leq 4$，$

Xi Ruoyao

Last updated on Jul 25, 2021 4 min read

Projects

Linux From Scratch book Chinese translation

Linux From Scratch (LFS) is a project that provides you with step by step instructions for building your own custom Linux system, entirely from source code. This is Chinese translation of LFS book.

Linux From Scratch book Chinese translation

Xidian University Online Judge Next Generation

This would replace HUSTOJ as the Online Judge of XDU ACM/ICPC.

Xidian University Online Judge Next Generation

Contact

gpg --recv-keys 12E9D32E766A57DC069D76B0D95E4716CCBB34DC
xry111@mengyan1223.wang
266 Xifeng Rd., Xi'an, Shaanxi 710126