/in/foo.cc: In function 'Giver* getGiverByName(Giver*, int, const string&)':
/in/foo.cc:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(unsigned i = 0; i < n; i++)
                      ~~^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:46:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < allCount; i++)
                 ~~^~~~~~~~~~
/in/foo.cc:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < count; i++)
                  ~~^~~~~~~
/in/foo.cc:70:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i = 0; i < allCount; i++)
                 ~~^~~~~~~~~~