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 …