Compilare: main.cpp: In function 'void dfs(int)': main.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int k=0; k < adj[nod].size(); k++) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:39:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int k=0; k < adj[nod].size(); k++) | ~~^~~~~~~~~~~~~~~~~