Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:16:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void BFS2(int)’: user.cpp:29:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vt[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:59:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] {for(j=0;j<c[i].size();j++) ^