A* Heuristic Algorithm

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    #include <algorithm>  // for sort
    #include <fstream>
    #include <iostream>
    #include <sstream>
    #include <string>
    #include <vector>
    using std::cout;
    using std::ifstream;
    using std::istringstream;
    using std::sort;
    using std::string;
    using std::vector;
    using std::abs;
    
    // TODO: Add kStart and KFinish enumerators to the State enum.
    enum class State {kStart …
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