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2. common-lisp gists

   Common Lisp

3. 4

     You can define the size of Queens

4. Terraform syntax learning summary

   HCL 1

5. 2

       # any number can be writen as n = a*10 +b, where a >=0, b is 0~9

   3

       # for example 123 = 12 * 10 + 3

   4

       # so then any number N = (a*10 + b)^2 + remainer = a^2*100 + b*(b+20*a) + remainer

   5

       # then b*(b+20*a) <= N - a^2*100