Compilare: user.cpp: In function ‘void dfs(int, int, int)’: user.cpp:11:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define sz size() ^ user.cpp:31:30: note: in expansion of macro ‘sz’ for(int j=0; j<nod[varf].sz; j++){ ^ user.cpp: In function ‘int32_t main()’: user.cpp:11:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define sz size() ^ user.cpp:72:22: note: in expansion of macro ‘sz’ for(int i=0; i<a.sz; i++) cout<<v[a[i]].x.x<<" "<<v[a[i]].x.y<<'\n'; ^