Compilare: main.cpp: In function 'void dfs(int)': main.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < h[key].size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp:31:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < arb[nod].size(); ++i) ~~^~~~~~~~~~~~~~~~~