what does regular expression do in this solution?
just for decrease solution size?
Program an exclusive OR operation with logical operators
Project Euler: Problem 10, Sum of Primes
Sum of series II
Draw a 'N'!
Sums of Multiple Pairs of Triangular Numbers
"Find out the best cricket"
Kurchan 4x4 - Optimal score
S-T-R-E-T-C-H I-T O-U-T
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