Compilare: user.cpp: In function ‘int main()’: user.cpp:226:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<d.dist.size();i++) ^ user.cpp:254:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<d.dist.size();i++) ^ user.cpp:284:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<d.dist.size();i++) ^ user.cpp:313:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<r.size();i++) ^ user.cpp:327:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<r.size();i++) ^ user.cpp:342:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<r.size();i++) ^