Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:41:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Ad[nod].size();++i) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:93:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<sol[i].size();++j) ~^~~~~~~~~~~~~~