Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:24:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < lista[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~ main.cpp:22:22: warning: unused variable 'ok' [-Wunused-variable] int sons = 0, i, ok = 0; ^~ main.cpp: In function 'int main()': main.cpp:72:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < comp[i].size(); j++) ~~^~~~~~~~~~~~~~~~