Coloring [0 1 0 1 1 0 2] seems to work for test case 2, giving it a chromatic number of 3 rather than 4.
yes.. corrected. Thanks for pointing it out :-)
Connect Four Win Checker
Increment a number, given its digits
Make a simplified barcode
Construct a precedence graph from a code segment
Neither minima nor maxima
Beauty of Parentheses
remove single elements
longest common semi-substring
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