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1 | /* |
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2 | Kruskal's algorithm to find a spanning tree of minimum weight |
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3 | If the graph is not connected, it gives a forest. |
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4 | */ |
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5 | #ifndef KRUSKAL_H |
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6 | #define KRUSKAL_H |
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7 | |
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8 | #include <union_find.h> |
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9 | |
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10 | namespace hugo { |
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11 | |
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12 | template <typename graph_type, typename T> |
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13 | class Kruskal { |
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14 | |
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15 | |
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16 | //Hasznos typedef-ek |
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17 | typedef typename graph_type::NodeIt NodeIt; |
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18 | typedef typename graph_type::EdgeIt EdgeIt; |
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19 | typedef typename graph_type::EachNodeIt EachNodeIt; |
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20 | typedef typename graph_type::EachEdgeIt EachEdgeIt; |
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21 | typedef typename graph_type::SymEdgeIt SymEdgeIt; |
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22 | |
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23 | //input |
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24 | graph_type& G; |
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25 | typename graph_type::EdgeMap<T> &weight; |
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26 | |
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27 | //Auxilliary variables |
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28 | typename graph_type::NodeMap<int> component(flowG); |
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29 | |
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30 | Kruskal( |
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31 | graph_type& _G, |
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32 | typename graph_type::EdgeMap<T> & _weight) |
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33 | : G(_G), |
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34 | weight(_weight), |
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35 | component(-1) |
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36 | { |
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37 | } |
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38 | |
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39 | /*Originally by Misi.*/ |
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40 | struct Edge_comp |
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41 | { |
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42 | NodeMap<graph_type, T> &d; |
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43 | Node_dist_comp(NodeMap<graph_type, T> &_d) : d(_d) {} |
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44 | |
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45 | bool operator()(const NodeIt& u, const NodeIt& v) const |
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46 | { return d.get(u) < d.get(v); } |
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47 | }; |
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48 | |
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49 | |
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50 | //Runs the algorithm |
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51 | void run() { |
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52 | |
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53 | |
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54 | |
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55 | } |
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56 | |
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57 | } |
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58 | |
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59 | }//namespacc hugo |
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60 | |
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61 | #endif |
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