Eroare de compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:13:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<L[nod].size(); i++) ^ user.cpp:16:5: error: ‘a’ was not declared in this scope a[++k]=x; ^ user.cpp:16:9: error: ‘k’ was not declared in this scope a[++k]=x; ^ user.cpp:16:12: error: ‘x’ was not declared in this scope a[++k]=x; ^ user.cpp: In function ‘int main()’: user.cpp:21:9: error: ‘i’ was not declared in this scope for(i=1; i<=m; i++) ^ user.cpp:23:12: error: ‘x’ was not declared in this scope f>>x>>y; ^ user.cpp:23:15: error: ‘y’ was not declared in this scope f>>x>>y; ^ user.cpp:27:9: error: ‘i’ was not declared in this scope for(i=1; i<=n; i++) ^ user.cpp:30:9: error: ‘i’ was not declared in this scope for(i=1; i<=k; i++) ^ user.cpp:30:17: error: ‘k’ was not declared in this scope for(i=1; i<=k; i++) ^ user.cpp:31:12: error: ‘a’ was not declared in this scope g<<a[i]<<' '; ^