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@ -1,82 +1,79 @@
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import heapq
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import doctest
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# diagonal clockwise
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dxy1 = [
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(1, 1),
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(1, 0),
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(1, -1),
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(0, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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(0, 1),
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]
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# diagonal anti-clockwise
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dxy2 = [
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(-1, -1),
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(-1, 0),
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(0, -1),
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(-1, 1),
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]
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# start point and end point on same row and column right side
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dxy3 = [
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(0, -1),
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(-1, -1),
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(-1, 0),
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(-1, 1),
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]
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# start point and end point on same row and column left side
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dxy4 = [
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(0, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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]
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# start point and end point on same column and row down side
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dxy5 = [
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(1, 0),
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(0, 1),
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(1, 1),
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(1, -1),
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(0, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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]
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# start point and end point on same column and row up side
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dxy6 = [
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(0, -1),
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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]
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class UniformCostSearch:
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def __init__(
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self, current: list[int], final: list[int], grid: list[list[int]]
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) -> None:
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def __init__(self, grid: list[list[int]]) -> None:
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self.m = len(grid[0])
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self.n = len(grid)
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# diagonal clockwise
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dxy1 = [
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(1, 1),
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(1, 0),
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(1, -1),
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(0, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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(0, 1),
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]
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# diagonal anti-clockwise
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dxy2 = [
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(-1, -1),
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(-1, 0),
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(0, -1),
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(-1, 1),
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]
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# start point and end point on same row and column right side
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dxy3 = [
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(0, -1),
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(-1, -1),
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(-1, 0),
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(-1, 1),
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]
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# start point and end point on same row and column left side
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dxy4 = [
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(0, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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]
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# start point and end point on same column and row down side
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dxy5 = [
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(1, 0),
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(0, 1),
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(1, 1),
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(1, -1),
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(0, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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]
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# start point and end point on same column and row up side
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dxy6 = [
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(0, -1),
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(0, 1),
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(1, 1),
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(1, 0),
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(1, -1),
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(-1, -1),
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(-1, 0),
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(-1, 1),
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]
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def get_shortest_path(
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self,
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start: list[int],
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@ -86,8 +83,12 @@ class UniformCostSearch:
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) -> list[list[int]]:
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"""
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Return 2D list where optimal path is stored.
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>>> get_shortest_path([0, 2],[2, 2], [['inf','inf',1],['inf,2,2],['inf',0,3]], [(1, 1),(1, 0),(1, -1),(0, -1),(-1, -1),(-1, 0),(-1, 1),(0, 1)])
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[[0,2],[1,2],[2,2]]
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>>> start = [0,0]
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>>> end = [1, 2]
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>>> dist = [[1,0],[0,2]]
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>>> dxy = [(1, 1),(1, 0),(1, -1),(0, -1),(-1, -1),(-1, 0),(-1, 1),(0, 1)]
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>>> get_shortest_path(start,end,dist,dxy)
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[[0,0],[1,1]]
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"""
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shortest_path = []
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curr_node = end
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@ -120,8 +121,14 @@ class UniformCostSearch:
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) -> list[list[int]]:
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"""
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Return 2D list where optimal path is stored.
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>>> ucs([0, 2],[[1,2],[2, 2]], [[0,0,0],[0,0,0],[0,0,0]], [[None, None, None], [None, None, None],[None, None, None]], [(1, 1),(1, 0),(1, -1),(0, -1),(-1, -1),(-1, 0),(-1, 1),(0, 1)], [1000000, 100000])
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[[0,2],[1,2],[2,2]]
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>>> current = [0, 0]
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>>> final = [[1, 1]]
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>>> grid = [[0,0],[0,0]]
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>>> prev = [[None, None],[None, None]]
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>>> dxy = [(1, 1),(1, 0),(1, -1),(0, -1),(-1, -1),(-1, 0),(-1, 1),(0, 1)]
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>>> goal_answer = [1000000, 100000]
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>>> ucs(current,final,grid,dxy,prev,goal_answer)
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[[0,2],[1,1]]
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"""
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dist = [[float("inf") for _ in range(self.m)] for _ in range(self.n)]
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@ -175,25 +182,28 @@ class UniformCostSearch:
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) -> list[list[int]]:
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"""
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Return 2D list where optimal path is stored.
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>>> your_algorithm([0, 2],[2, 2], [[0,0,0],[0,0,0],[0,0,0]])
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[[0,2],[1,2],[2,2]]
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>>> start_point = [0, 0]
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>>> end_point = [1, 1]
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>>> grid = [[0,0],[0,0]]
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>>> your_algorithm(start_point, end_point, grid)
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[[0,0],[1,1]]
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"""
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prev = [[None for _ in range(self.m)] for _ in range(self.n)]
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dxy = []
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if start_point[1] - end_point[1] == 0 and start_point[0] - end_point[0] < 0:
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dxy = self.dxy5
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dxy = dxy5
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elif start_point[1] - end_point[1] == 0 and start_point[0] - end_point[0] > 0:
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dxy = self.dxy6
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dxy = dxy6
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elif start_point[0] - end_point[0] == 0 and start_point[1] - end_point[1] < 0:
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dxy = self.dxy4
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dxy = dxy4
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elif start_point[0] - end_point[0] == 0 and start_point[1] - end_point[1] > 0:
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dxy = self.dxy3
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dxy = dxy3
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elif start_point[0] - end_point[0] > 0:
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dxy = self.dxy2
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dxy = dxy2
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elif start_point[0] - end_point[0] < 0:
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dxy = self.dxy1
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dxy = dxy1
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goal_answer = []
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for cell in end_point:
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for _ in range(0, len(end_point)):
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goal_answer.append(10**8)
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path = self.ucs(start_point, [end_point], grid, prev, dxy, goal_answer)
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return path
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@ -202,12 +212,10 @@ class UniformCostSearch:
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def run() -> None:
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"""
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Return None. Its just running the UCS algorithm class.
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>>> run(2, 2)
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>>> run()
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None
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"""
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executed_object = UniformCostSearch(
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[0, 7],
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[19, 17],
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[
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[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
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[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0],
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