You're *very* close with this one. Remember that r is input as a double, not a string.
Flip the main diagonal of a matrix
Say something funny
Length of a short side
Divisible by 4
Write c^3 as sum of two squares a^2+b^2
Miles to go before I sleep
Exponents in Factorials
How many days?!?
High Precision Square Root (Inspired by Project Euler 80)
Highest powers in factorials
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