Compilare: main.cpp: In function 'void graf_to_arb()': main.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < adiac[nod].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'std::pair<int, int> DFS(int, bool, int)': main.cpp:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < arbore[nod].size(); i++) { ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void run_test()': main.cpp:70:12: warning: unused variable 'j' [-Wunused-variable] int i, j; ^