Guess the password or break the lock.
And this problem is much easier than others you solved here!! ;-)
Sorry, I was tempted by the 'break the lock' part... :)
Select every other element of a vector
Selecting books on MATLAB for experts and beginners (blindfolded)
Vectorizing, too easy or too hard?
Get the length of a given vector
Check if equal
How many solutions has this problem?
Polite numbers. N-th polite number.
Alternative Scoring. Create an incremental spiral.
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