Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < adj[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (i = 0; i < rez.size(); ++i) | ~~^~~~~~~~~~~~ main.cpp:37:18: warning: unused variable 'j' [-Wunused-variable] 37 | int n, k, i, j, a, b; | ^