Compilare: main.cpp: In function 'void dfs(int, int, int)': main.cpp:18:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[nod].size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void bfs(int)': main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < tr[st].size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp:36:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < tr[adv[i]].size(); ++j) ~~^~~~~~~~~~~~~~~~~~~