2019

    10

    World Cup

    For me, the core of the problem is to figure out how the matches carry on exactly. It's the hardest part for me.

    Rising Sun

    Position of the house can be divided into two situation, Uphill slope and Downhill slope. And the two situations are used to calculate the Y position of the house.

    Voronoi Diagram Returns

    From the description above we can draw that the Voronoi Diagram is drawn not casually but with some rules and the role can only correspond to one kind of the diagram.

    09

    Big N!

    Using C/C++ we can’t calculate very big number of prime factors. So we use string to store it.

    Big number A+B

    The problem A+B is probably the easiest problem, however, the maxim number C/C++ can calculate is between -9223372036854775808~9223372036854775807. The bigger number can’t be calculate unless you use Python or Java. So I’m going to introduce a way to calculate the big number of A+B.

    LaTex Symbols

    Here are some symbols that are not used very usual and how to type it in LaTex.

    Linear combination and spam

    1. combination:
      $$
      \overrightarrow{v_1}, \overrightarrow{v_2}, \overrightarrow{v_3} \cdots \overrightarrow{v_n} \in \mathbb{R}^n c_1 \overrightarrow{v_1}+c_2 \overrightarrow{v_2}+\cdots+c_n \overrightarrow{v_n}\left[\left(c_1 \rightarrow c_n\right) \in \mathbb{R}\right]
      $$

    2. span: $\vec{a}, \vec{b} \in \mathbb{R}$

    JS project with code

    The code of the bouncing all and more projects.

    JS projects

    I’ve learnt Processing JavaScript a little and have some complete projects. They are very simple but I think they are not ugly.

    Matrix of LaTex

    In order to post my note of linear algebra, I need to know how to put matrix using LaTex. The followings are the usage.


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