Eroare de compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:15:5: error: ‘viz’ was not declared in this scope viz[nod]=1; ^ user.cpp:17:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<a[nod].size(); ++i) ^ user.cpp:18:43: error: ‘dfs’ was not declared in this scope if (!viz[a[nod][i]]) dfs(a[nod][i]); ^ user.cpp:19:5: error: ‘st’ was not declared in this scope st.push(nod); ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:25:5: error: ‘viz’ was not declared in this scope viz[nod]=1; ^ user.cpp:26:5: error: ‘ctc’ was not declared in this scope ctc[u].push_back(nod); ^ user.cpp:27:5: error: ‘ctc1’ was not declared in this scope ctc1[nod]=u; ^ user.cpp:29:18: error: ‘b’ was not declared in this scope for (i=0; i<=b[nod].size(); ++i) ^ user.cpp: In function ‘void dfs3(int)’: user.cpp:35:5: error: ‘q’ was not declared in this scope q[++t]=nod; ^ user.cpp:35:9: error: ‘t’ was not declared in this scope q[++t]=nod; ^ user.cpp:36:5: error: ‘viz’ was not declared in this scope viz[nod]=1; ^ user.cpp:37:21: error: ‘c’ was not declared in this scope for (int i=0; i<c[nod].size(); ++i) ^ user.cpp:38:44: error: expected ‘;’ before ‘]’ token if (!viz[c[nod][i]]) dfs3(c[nod][i]]); ^ user.cpp: In function ‘bool f(int&, int&)’: user.cpp:43:5: error: ‘c’ was not declared in this scope c[y].push_back(y); ^ user.cpp:44:5: error: ‘t’ was not declared in this scope t=0; ^ user.cpp:45:22: error: ‘n’ was not declared in this scope