Compilare: main.cpp: In function 'void DFS(int)': main.cpp:77:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:124:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<m.size();i++) ~^~~~~~~~~