Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:16:37: 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:36:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i++ ){ ^ user.cpp:54:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < q.size(); i++ ){ ^