Compilare: user.cpp: In function ‘void df(int)’: user.cpp:10:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[k].size();i++) ^ user.cpp: In function ‘int conex()’: user.cpp:16:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp:18:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=n;i++) ^ user.cpp: In function ‘void ciclu(int)’: user.cpp:28:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[k].size();i++) ^ user.cpp:30:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[v[k][i]].size()>maxx) ^ user.cpp: In function ‘int main()’: user.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<=m;i++) ^