Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:36:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[x].size(); i++) { ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:52:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a[x].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:77:12: warning: ‘mini’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << mini << " " << min << "\n"; ^