Eroare de compilare: main.cpp:7:1: error: 'stack' does not name a type; did you mean 'obstack'? 7 | stack<int>stiva; | ^~~~~ | obstack main.cpp: In function 'void dfs(int)': main.cpp:19:5: error: 'stiva' was not declared in this scope 19 | stiva.push(x); | ^~~~~ main.cpp: In function 'int main()': main.cpp:39:13: error: 'stiva' was not declared in this scope 39 | while (!stiva.empty()) | ^~~~~ Non zero exit status: 1