Alternative solution to c01p03.

[akolybelnikov]

A shorter solution that also works.

[coveralls]

Coverage increased (+0.3%) to 76.2% when pulling 03c60b8 on akolybelnikov:master into 2186bf9 on brndnmtthws:master.

[brndnmtthws]

Sweet! Would you mind adding your solution into the same source file? i.e., just copy it into c01p03.rs? Just in case someone goes looking for all the solutions for that particular problem, they'll be able to find them in one place.

[brndnmtthws]

Thanks so much!