/in/foo.cc: In function 'int getsum(std::vector<int>&, int, int, int)':
/in/foo.cc:22:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = startPos+1; i < data.size(); i++)
                             ~~^~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:62:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i = 0; i < datas.size(); i++)
                  ~~^~~~~~~~~~~~~~