/in/foo.cc: In function 'void Sorting::Radix_Sort(ui*, ui)':
/in/foo.cc:54:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~
/in/foo.cc:65:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (ri i = 0; i < n; i++)
                   ~~^~~
/in/foo.cc:69:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~
/in/foo.cc:80:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~
/in/foo.cc:91:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (ri i = 0; i < n; i++)
                   ~~^~~
/in/foo.cc:95:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~