// -+- c++ -+-

 #include <vector>

 #include <algorithm>

 #include <lemon/dijkstra.h>

 class IntIntMap : public std::vector<int> {

 public:

   typedef std::vector<int> Parent;

   IntIntMap() : Parent() {}

   IntIntMap(int n) : Parent(n) {}

   IntIntMap(int n, int v) : Parent(n, v) {}

   void set(int key, int value) {

     Parent::operator[](key) = value;

   }

 };

 template <typename _Heap>

 void heapSortTest(int n) {

   typedef _Heap Heap;

   IntIntMap map(n, -1);

   Heap heap(map);

   std::vector<int> v(n);

   for (int i = 0; i < n; ++i) {

     v[i] = rand() % 1000;

     heap.push(i, v[i]);

   }

   std::sort(v.begin(), v.end());

   for (int i = 0; i < n; ++i) {

     check(v[i] == heap.prio() ,"Wrong order in heap sort.");

     heap.pop();

   }

 }

 template <typename _Heap>

 void heapIncreaseTest(int n) {

   typedef _Heap Heap;

   IntIntMap map(n, -1);

   Heap heap(map);

   std::vector<int> v(n);

   for (int i = 0; i < n; ++i) {

     v[i] = rand() % 1000;

     heap.push(i, v[i]);

   }

   for (int i = 0; i < n; ++i) {

     v[i] += rand() % 1000;

     heap.increase(i, v[i]);

   }

   std::sort(v.begin(), v.end());

   for (int i = 0; i < n; ++i) {

     check(v[i] == heap.prio() ,"Wrong order in heap increase test.");

     heap.pop();

   }

 }

 template <typename _Traits, typename _Heap>

 struct DefHeapTraits : public _Traits {

   typedef _Heap Heap;

 };

 template <typename _Graph, typename _LengthMap, typename _Heap>

 void dijkstraHeapTest(_Graph& graph, _LengthMap& length,

 		      typename _Graph::Node& start) {

   typedef _Heap Heap;

   typedef _Graph Graph;

   typedef _LengthMap LengthMap;

   typedef typename Graph::Node Node;

   typedef typename Graph::Edge Edge;

   typedef typename Graph::NodeIt NodeIt;

   typedef typename Graph::EdgeIt EdgeIt;

   Dijkstra<Graph, LengthMap, 

     DefHeapTraits<DijkstraDefaultTraits<Graph, LengthMap>, Heap> > 

     dijkstra(graph, length);

   dijkstra.run(start);

   for(EdgeIt e(graph); e!=INVALID; ++e) {

     Node u=graph.source(e); 

     Node v=graph.target(e);

     if (dijkstra.reached(u)) {

       check( dijkstra.dist(v) - dijkstra.dist(u) <= length[e],

 	     "Error in a shortest path tree edge!");

     }

   }

   for(NodeIt v(graph); v!=INVALID; ++v) {

     if ( dijkstra.reached(v) && dijkstra.pred(v) != INVALID ) {

       Edge e=dijkstra.pred(v);

       Node u=graph.source(e);

       check( dijkstra.dist(v) - dijkstra .dist(u) == length[e],

 	     "Error in a shortest path tree edge!");

     }

   }

 }