Compilare: user.cpp: In function ‘void kruskal1()’: user.cpp:83:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:122:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<viz[i].size();j++) ^ user.cpp:126:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < viz[nod].size(); i++) ^