Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:52:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i = 0; i < adj[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:109:21: warning: unused variable 'j' [-Wunused-variable] 109 | int n, m, k, i, j, a, b, c, cnt = 0; | ^ main.cpp:109:33: warning: unused variable 'cnt' [-Wunused-variable] 109 | int n, m, k, i, j, a, b, c, cnt = 0; | ^~~ main.cpp:157:8: warning: 'root' may be used uninitialized [-Wmaybe-uninitialized] 157 | dfs(root, 0); | ~~~^~~~~~~~~ main.cpp:138:9: note: 'root' was declared here 138 | int root; | ^~~~