Compilare: user.cpp: In function ‘int main()’: user.cpp:50:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0,j=0;i<=v[p[start].second].size() && j<=v[p[finl].second].size();++i,j++) ^ user.cpp:50:81: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0,j=0;i<=v[p[start].second].size() && j<=v[p[finl].second].size();++i,j++) ^ user.cpp:52:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==v[p[start].second].size()) ^ user.cpp:58:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j==v[p[finl].second].size()) ^