Compilare: user.cpp: In function ‘int count(const Sector&, std::pair<int, int>)’: user.cpp:97:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(step = 1; step < sector.seg.size(); step <<= 1); ^ user.cpp:100:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + step < sector.seg.size() ^ user.cpp:105:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos + 1 < sector.seg.size() && sgn(sector.seg[pos + 1], p) == 0) ^