IN PYTHON IN PYTHON IN PYTHON In this section, you will investigate the problem
ID: 3751104 • Letter: I
Question
IN PYTHON
IN PYTHON
IN PYTHON
In this section, you will investigate the problem of navigation on a two-dimensional grid with obstacles. The goal is to produce the shortest path between a provided pair of points, taking care to maneuver around the obstacles as needed. Path length is measured in Euclidean distance. Valid directions of movement include up, down, left, right, up-left, up-right, down-left, and down-right. Your task is to write a function find_path(start, goal, scene) which returns the shortest path from the start point to the goal point that avoids traveling through the obstacles in the grid. For this problem, points will be represented as two-element tuples of the form (row, column), and scenes will be represented as two-dimensional lists of Boolean values, with False values corresponding empty spaces and True values corresponding to obstacles. Your output should be the list of points in the path, and should explicitly include both the start point and the goal point. Your implementation should consist of an A* search using the straight-line Euclidean distance heuristic. If multiple optimal solutions exist, any of them may be returned. If no optimal solutions exist, or if the start point or goal point lies on an obstacle, you should return the sentinal value None >scene[[False, False, False], [False, True False], [False, False, False]] >>> scene = [[False, True, False], [False, True, False], [False, True, False]] >>> find_path((e, ) (2, 1), scene) >>> print find_path((e, e), (e, 2), scene) NoneExplanation / Answer
import java.io.File;
import java.io.FileReader;
public class 8 puzzle program
{
public static void main(String args[])
}
public class Board
{
public Board(int[][] blocks)
public int size()
public int hamming()
public int manhattan()
public boolean isGoal()
public boolean isSolvable()
public boolean equals(Object y)
public Iterable<Board> neighbors()
public String toString()
public static void main(String[] args)
public class Solver
{
public Solver(Board initial)
public int moves()
public Iterable<Board> solution()
public static void main(String[] args)
}
public static void main(String[] args)
{
In in = new In(args[0]);
int N = in.readInt();
int[][] blocks = new int[N][N];
for (int i = 0; i < N; i++)
for (int j = 0; j < N; j++)
blocks[i][j] = in.readInt();
Board initial = new Board(blocks);
if (initial.isSolvable())
{
Solver solver = new Solver(initial);
StdOut.println("Minimum number of moves = " + solver.moves());
for (Board board : solver.solution())
StdOut.println(board);
}
else
{
StdOut.println("Unsolvable puzzle");
}
}