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 DFS2(int)’: user.cpp:26:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vt[x].size();i++) ^ user.cpp: In function ‘int DFS3(int)’: user.cpp:35:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<gt[x].size();i++) ^ user.cpp: In function ‘void Build()’: user.cpp:51:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<c[i].size();j++) ^ user.cpp:53:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(t=0;t<v[nod].size();t++) ^ user.cpp:60:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<gt[i].size();j++) ^ user.cpp: In function ‘int main()’: user.cpp:101:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<c[nrcomp].size();j++) ^