Compilare: user.cpp: In function ‘int bfs()’: user.cpp:24:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++){ ^ user.cpp: In function ‘void bfs1()’: user.cpp:47:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v[nod].size() ; i++){ ^ user.cpp: In function ‘void bfs2()’: user.cpp:66:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v[nod].size() ; i++){ ^ user.cpp: In function ‘int main()’: user.cpp:88:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[n].size();i++){ ^