看到最近在网上很火的一个可以 mark 自己曾经去过的省份的互动应用正好公开了源代码。我突发奇想（not really）能不能通过快速替换地图的方式制作一个美国版。

Some notes on solving linear recurrence relations (just in case I need analyze algorithms again).

Language review for Yiddish for my NLP class.

Creating (categorical) heatmaps with matplotlib consists of 2 steps: painting cells with colors and annotating it.

This is a test post.

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begin
	writeln("Hello world!");
end.