Quote:
Originally Posted by 0scar
I wish I could call you "pessimistic".
Looking at the past three years, Oct20 seems somehow similar to Nov17, another "findconstrainedalgorithm" challenge. Nov17 was actually solved by 23 people only.
On the other hand, both Oct20 and July20 deal with linearrecurrenced sequences, candidate solutions can be analyzed with similar linear algebra methods.
About CHAOS, I found it useful to know that the following kind of instruction is permitted:
30 CHAOS 30, 40, 50, ...
so that the control flow graph has an edge from a oneline block to itself.

But that isn't necessary! There are solutions for both problems (0,2,2,... and 1970) without using this trick.