Uva Online Tools

References:
[0] Problems for try/test special cases
     http://www.uvatoolkit.com/problemssolve.php
[1] https://en.wikibooks.org/wiki/Optimizing_C%2B%2B/Code_optimization/Faster_operations
[2] http://embeddedgurus.com/stack-overflow/2009/06/division-of-integers-by-constants/
[3] bitsets fast operations collection
     https://graphics.stanford.edu/~seander/bithacks.html#ParityWith64Bits
[4] Debug code http://gcc.godbolt.org/

Solutions:

[1] https://github.com/ksaveljev