Eroare de compilare: main.cpp: In function 'void dfs(int)': main.cpp:20:16: error: 'begin' was not declared in this scope; did you mean 'std::begin'? 20 | for (auto i : x) | ^ | std::begin In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95, from main.cpp:1: /usr/include/c++/10/valarray:1224:5: note: 'std::begin' declared here 1224 | begin(const valarray<_Tp>& __va) | ^~~~~ main.cpp:20:16: error: 'end' was not declared in this scope; did you mean 'std::end'? 20 | for (auto i : x) | ^ | std::end In file included from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:95, from main.cpp:1: /usr/include/c++/10/valarray:1244:5: note: 'std::end' declared here 1244 | end(const valarray<_Tp>& __va) | ^~~ Non zero exit status: 1