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Update grader.py

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Ankur Sundara 2017-03-11 03:10:41 -06:00 committed by GitHub
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library/grader.py
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@ -1,3 +1,9 @@
# Very easy problem. Compute a few values w/ brute force or something, then check OEIS.
# Part of: https://oeis.org/A001333
# Tells us: f(n) = (1/4) * Trace( [[0,0,1,0],[0,1,0,1],[1,0,2,0],[0,2,0,1]] )
# just write a program to compute this quickly
# this sol takes something like ~O(log n) i think?
x = input() + 1
mat = [[0,0,1,0],[0,1,0,1],[1,0,2,0],[0,2,0,1]]