/in/foo.cc: In function 'void Sorting::Radix_Sort(ui*, ui)':
/in/foo.cc:62:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~
/in/foo.cc:73:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (ri i = 0; i < n; i++)
                   ~~^~~
/in/foo.cc:77:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~
/in/foo.cc:88:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~
/in/foo.cc:99:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (ri i = 0; i < n; i++)
                   ~~^~~
/in/foo.cc:103:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (ri i = 0; i < n; i++)
                  ~~^~~