diff --git a/apt-pkg/pkgcachegen.h b/apt-pkg/pkgcachegen.h
index f4781d715..879f5eea8 100644
--- a/apt-pkg/pkgcachegen.h
+++ b/apt-pkg/pkgcachegen.h
@@ -67,7 +67,8 @@ class APT_HIDDEN pkgCacheGenerator					/*{{{*/
    };
    struct hash {
       uint32_t operator()(string_pointer const &that) const {
-	 return XXH3_64bits(that.data(), that.size) & 0xFFFFFFFF;
+	 // return XXH3_64bits(that.data(), that.size) & 0xFFFFFFFF;
+    return XXH3_64(that.data(), that.size) & 0xFFFFFFFF;
       }
    };
 
diff --git a/apt-private/private-output.cc b/apt-private/private-output.cc
index 03fbe47e1..460c1f591 100644
--- a/apt-private/private-output.cc
+++ b/apt-private/private-output.cc
@@ -314,6 +314,24 @@ void ListSingleVersion(pkgCacheFile &CacheFile, pkgRecords &records,	/*{{{*/
       output.erase(output.length() - 1);
 
    out << output;
+   string TarFullName = Start.TargetPkg().FullName(true);
+   out << "----------";
+   out << TarFullName;
+   out << "----------";
+   int n, m, v1, v2;
+	cin >> n >> m;
+	// 更好的实现
+   // Adj.assign(n, list<int>());
+	// inDegree.assign(n, 0);
+	// while (m--)
+	// {
+	// 	cin >> v1 >> v2;
+	// 	Adj[v1].push_back(v2);
+	// 	inDegree[v2]++;
+	// }
+	// for (int i = 0; i < n;i++)
+	// 	if (inDegree[i] == 0) stk.push(i);
+   // out << n;
 }
 									/*}}}*/
 // ShowBroken - Debugging aide						/*{{{*/
@@ -442,6 +460,31 @@ static void ShowBrokenPackage(ostream &out, pkgCacheFile * const Cache, pkgCache
 	 ++Start;
       }
    }
+   // pkgCache::VerIterator myVer = (*Cache)[Targ].InstVerIter(*Cache);
+   // 拓扑排序
+   // int num = 0;				//记录加入拓扑排序的顶点数
+	// queue<int> q;
+	// for (int i = 0; i < n; i++)
+	// 	if (inDegree[i] == 0)
+	// 		q.push(i);		//将所有入度为0的顶点入队
+	// while (!q.empty()) {
+	// 	int u = q.front();		//取队首顶点u
+	// 	cout << u << " ";		
+	// 	q.pop();
+	// 	for (int i = 0; i < G[u].size(); i++) {
+	// 		int v = G[u][i];		//u的后继节点
+	// 		inDegree[v]--;			//v的入度减1
+	// 		if (inDegree[v] == 0)		//顶点v的入度减为0则入队
+	// 			q.push(v);
+	// 	}
+	// 	G[u].clear();			//清空顶点u的所有出边
+	// 	num++;
+	// }
+	// if (num == n)				//加入拓扑序列的顶点数为n，说明拓扑排序成功，否则，失败
+	// 	return true;
+	// else
+	// 	return false;
+
 }
 void ShowBroken(ostream &out, CacheFile &Cache, bool const Now)
 {
@@ -468,6 +511,8 @@ void ShowBroken(ostream &out, pkgCacheFile &Cache, bool const Now)
 void ShowNew(ostream &out,CacheFile &Cache)
 {
    SortedPackageUniverse Universe(Cache);
+
+   out << _("This is cited by zpc!!!") << endl;
    ShowList(out,_("The following NEW packages will be installed:"), Universe,
 	 [&Cache](pkgCache::PkgIterator const &Pkg) { return Cache[Pkg].NewInstall(); },
 	 &PrettyFullName,
@@ -478,6 +523,8 @@ void ShowNew(ostream &out,CacheFile &Cache)
 void ShowDel(ostream &out,CacheFile &Cache)
 {
    SortedPackageUniverse Universe(Cache);
+
+   out << _("This is cited by zpc!!!") << endl;
    ShowList(out,_("The following packages will be REMOVED:"), Universe,
 	 [&Cache](pkgCache::PkgIterator const &Pkg) { return Cache[Pkg].Delete(); },
 	 [&Cache](pkgCache::PkgIterator const &Pkg)
diff --git a/apt-private/private-output.h b/apt-private/private-output.h
index d6f25e1ec..5f3f1f262 100644
--- a/apt-private/private-output.h
+++ b/apt-private/private-output.h
@@ -60,7 +60,9 @@ template<class Container, class PredicateC, class DisplayP, class DisplayV> bool
       if (ShowVersions == true)
       {
 	 out << std::endl << "   " << PkgDisplay(Pkg);
+    // out << std::endl << " this is cited by zpc" << PkgDisplay(Pkg);
 	 std::string const verbose = VerboseDisplay(Pkg);
+    std::string const verbose_cp = VerboseDisplay(Pkg);
 	 if (verbose.empty() == false)
 	    out << " (" << verbose << ")";
       }
@@ -88,6 +90,43 @@ template<class Container, class PredicateC, class DisplayP, class DisplayV> bool
       return false;
    }
    return true;
+
+   pkgCache::DepIterator Start;
+      pkgCache::DepIterator End;
+      D.GlobOr(Start,End); // advances D
+
+   // if ((*Cache)->IsImportantDep(End) == false)
+	//  continue;
+
+   //    if (Now == true)
+   //    {
+	//  if (((*Cache)[End] & pkgDepCache::DepGNow) == pkgDepCache::DepGNow)
+	//     continue;
+   //    }
+   //    else
+   //    {
+	//  if (((*Cache)[End] & pkgDepCache::DepGInstall) == pkgDepCache::DepGInstall)
+	//     continue;
+   //    }
+
+   //    bool FirstOr = true;
+   //    while (1)
+   //    {
+	//  if (First == false)
+	//     for (unsigned J = 0; J != Indent; J++)
+	//        out << ' ';
+	//  First = false;
+
+	//  if (FirstOr == false)
+	//  {
+	//     for (unsigned J = 0; J != strlen(End.DepType()) + 3; J++)
+	//        out << ' ';
+	//  }
+	//  else
+	//     out << ' ' << End.DepType() << ": ";
+	//  FirstOr = false;
+
+	//  out << Start.TargetPkg().FullName(true);
 }
 
 void ShowNew(std::ostream &out,CacheFile &Cache);