what's the "str2num" mean?
str2num means "convert string to number"; even more cryptic is the fact that "str2num 1:10" is equivalent to "str2num('1:10')" (Matlab allows you to omit the single quotes and parentheses when using functions that take character strings as arguments).
Reverse Run-Length Encoder
Number of 1s in the Binary Representation of a Number
Scoring for oriented dominoes
Find state names that start with the letter N
Find the peak 3n+1 sequence value
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