Eroare de compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:12:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < a[nod].size() ; i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:26:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < a[nod].size() ; i++) ^ user.cpp: In function ‘int main()’: user.cpp:90:46: error: ‘comparator’ was not declared in this scope sort(a[i].begin() , a[i].end() , comparator); ^