Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:21:18: 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:63:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<afis[i].size();j++) fout << afis[i][j] << ' '; ~^~~~~~~~~~~~~~~