Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:17:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v1[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:28:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v2[nod].size();i++) ~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<sol[i].size();j++)fout<<sol[i][j]<<" "; ~^~~~~~~~~~~~~~