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user 90465
This challenge is intended to be solved by using, manipulating, accepting as input, outputting, or calculating calendar dates or clock times.
3
votes
Days in indexed month
C++ (g++), 60 54 47 40 bytes
1-indexed. f(2)==29.
int f(int n){return(n^n/8)%2-(n==2)+30;}
Solution from k-map, which simplified to A=w+x+z and B=zw'+z'w. A was negated and became a subtraction.
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