Реализация алгоритма Дейкстры
This commit is contained in:
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d8fb7ab226
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1224a5afee
11
stepushovgs/labyrinth/mazes/tests/test_lab2.txt
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11
stepushovgs/labyrinth/mazes/tests/test_lab2.txt
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@ -0,0 +1,11 @@
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#####################################
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#S #
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# #
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# #
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# #
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# #
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# #
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# #
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# #
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# E#
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#####################################
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20
stepushovgs/labyrinth/mazes/tests/test_lab20x20.txt
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20
stepushovgs/labyrinth/mazes/tests/test_lab20x20.txt
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@ -0,0 +1,20 @@
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####################
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S # # # #
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### # ### # ### # ##
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# # # # # # # # ##
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# ### # ### # ### ##
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# # # # # ##
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# ### ### ### # # ##
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# # # # # # # # ##
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# # # # ### # # # ##
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# # # # # # # # ##
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# # # ### # # # # ##
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# # # # # # # ##
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# # ### # ### # # ##
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# # # # # # ##
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# ### # ### # ### ##
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# # # # # # # # ##
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# # # # # # # # # ##
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# # # # # # # # # ##
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# # # # E#
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####################
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@ -58,7 +58,7 @@ class ConsoleView(Observer):
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elif c.toStr() in ["S", "E"]:
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print(c.toStr(), end='')
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elif c.getXY() in path_xy:
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print('*', end='')
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print('.', end='')
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else:
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print(c.toStr(), end='')
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@ -1,10 +1,56 @@
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from source.strategy import PathFindingStrategy
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from heapq import *
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from source.strategy import PathFindingStrategy, reconstruct_path
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from source.classes import Maze, Cell
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class Dijkstra(PathFindingStrategy):
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def findPath(self, maze: Maze, start: Cell, exit: Cell):
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pass
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@property
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def name(self) -> str:
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"""Возвращает название метода"""
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return "Dijkstra"
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def findPath(self, maze: Maze):
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start_cell = maze.start
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exit_cell = maze.exit
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queue = []
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counter = 0 # счётчик для уникальности, чтобы не сравнивать клетки
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heappush(queue, (0, counter, start_cell))
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counter += 1
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cost_visited = {start_cell.getXY(): 0}
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came_from = {start_cell.getXY(): None}
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visited_count = 1
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while queue:
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current_cost, _, current_cell = heappop(queue)
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if current_cell.getXY() == exit_cell.getXY():
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return reconstruct_path(
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came_from=came_from,
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start=start_cell,
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end=current_cell
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), visited_count
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next_cells = maze.getNeighbors(current_cell)
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for next_cell in next_cells:
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neighbor_cost = next_cell.value
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neighbor_cell_xy = next_cell.getXY()
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new_cost = current_cost + neighbor_cost
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if neighbor_cell_xy not in cost_visited or new_cost < cost_visited[neighbor_cell_xy]:
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heappush(queue, (new_cost, counter, next_cell))
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counter += 1
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cost_visited[neighbor_cell_xy] = new_cost
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came_from[neighbor_cell_xy] = current_cell
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visited_count += 1
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return [], visited_count
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def __dijkstra__(self, maze: Maze, start: Cell, exit: Cell):
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pass
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@ -2,7 +2,7 @@
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 1,
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"execution_count": 12,
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"id": "4dbe48b6",
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"metadata": {},
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"outputs": [],
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@ -17,7 +17,19 @@
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"execution_count": 13,
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"id": "007bf97a",
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"metadata": {},
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"outputs": [],
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"source": [
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"test_lab = './mazes/tests/test_lab.txt'\n",
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"test_lab2 = './mazes/tests/test_lab2.txt'\n",
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"test_lab3 = './mazes/tests/test_lab20x20.txt'"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 14,
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"id": "4489fc7e",
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"metadata": {},
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"outputs": [
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@ -35,7 +47,7 @@
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}
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],
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"source": [
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"with open('test_lab.txt') as f:\n",
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"with open(test_lab) as f:\n",
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" data = f.readlines()\n",
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" for el in data:\n",
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" print(el.rstrip())"
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@ -43,7 +55,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"execution_count": 15,
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"id": "fde1eddb",
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"metadata": {},
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"outputs": [
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@ -64,14 +76,14 @@
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"\n",
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"\n",
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"builder = TextFileMazeBuilder()\n",
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"maze = builder.buildFromFile(filename='test_lab.txt')\n",
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"maze = builder.buildFromFile(filename=test_lab)\n",
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"\n",
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"maze.printer()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"execution_count": 16,
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"id": "22325f68",
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"metadata": {},
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"outputs": [
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@ -80,7 +92,7 @@
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"output_type": "stream",
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"text": [
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"Загружен лабиринт:\n",
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"S*P# ###\n",
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"S.P# ###\n",
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"## # # E\n",
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"# # #\n",
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"### ## #\n",
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@ -104,7 +116,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 5,
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"execution_count": 17,
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"id": "19840429",
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"metadata": {},
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"outputs": [
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@ -113,11 +125,11 @@
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"output_type": "stream",
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"text": [
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"Путь найден:\n",
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"S**# ###\n",
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"##*# #*E\n",
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"# ** #*#\n",
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"###*##*#\n",
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"# ****#\n",
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"S..# ###\n",
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"##.# #.E\n",
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"# .. #.#\n",
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"###.##.#\n",
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"# ....#\n",
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"########\n"
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]
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},
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@ -142,15 +154,12 @@
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" (7, 1)])"
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]
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},
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"execution_count": 5,
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"execution_count": 17,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"\n",
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"\n",
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"\n",
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"solver = MazeSolver(maze, DFS(), ConsoleView())\n",
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"stats = solver.solve()\n",
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"\n",
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@ -159,7 +168,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 6,
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"execution_count": 18,
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"id": "73ba37a8",
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"metadata": {},
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"outputs": [
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@ -168,11 +177,11 @@
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"output_type": "stream",
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"text": [
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"Путь найден:\n",
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"S**# ###\n",
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"##*# #*E\n",
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"# ** #*#\n",
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"###*##*#\n",
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"# ****#\n",
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"S..# ###\n",
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"##.# #.E\n",
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"# .. #.#\n",
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"###.##.#\n",
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"# ....#\n",
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"########\n"
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]
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},
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@ -197,15 +206,12 @@
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" (7, 1)])"
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]
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},
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"execution_count": 6,
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"execution_count": 18,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"\n",
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"\n",
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"\n",
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"solver = MazeSolver(maze, BFS(), ConsoleView())\n",
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"stats = solver.solve()\n",
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"\n",
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@ -214,7 +220,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 7,
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"execution_count": 19,
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"id": "857c5c04",
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"metadata": {},
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"outputs": [
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@ -223,10 +229,12 @@
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"output_type": "stream",
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"text": [
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"0\n",
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"2\n",
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"1\n",
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"4\n",
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"2\n",
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"3\n",
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"4\n"
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"3\n",
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"2\n"
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]
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},
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{
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@ -235,7 +243,7 @@
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"{'0', '1', '2', '3', '4'}"
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]
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},
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"execution_count": 7,
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"execution_count": 19,
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"metadata": {},
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"output_type": "execute_result"
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}
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@ -264,7 +272,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"execution_count": 20,
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"id": "9a5ea5cb",
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"metadata": {},
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"outputs": [
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@ -350,7 +358,7 @@
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},
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{
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"cell_type": "code",
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"execution_count": 9,
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"execution_count": 21,
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"id": "32edf4d1",
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"metadata": {},
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"outputs": [
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@ -364,7 +372,7 @@
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}
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],
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"source": [
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"with open('test_lab.txt') as f:\n",
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"with open(test_lab) as f:\n",
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" data = f.read().splitlines()\n",
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" x, y = 0, 0\n",
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" width = len(data[0])\n",
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@ -375,9 +383,91 @@
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"execution_count": 22,
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"id": "48d20564",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Путь найден:\n",
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"# # # # # # # # # # # # # # # # # # # #\n",
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"S. # # # #\n",
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"#.# # # # # # # # # # # # #\n",
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"#..... # # # # # # # # #\n",
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"# #.# # # # # # # # # # # #\n",
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"# #............. # # # # #\n",
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"# # # # # # #. # # # # # # #\n",
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"# # # # #..... # # # # #\n",
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"# # # # # # #. # # # # #\n",
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"# # # # #. # # # # #\n",
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"# # # # # # #. # # # # #\n",
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"# # # # #..... # # # #\n",
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"# # # # # # # # #. # # # #\n",
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"# # # # #. # # #\n",
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"# # # # # # # # #. # # # # #\n",
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"# # # # # # #. # # # #\n",
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"# # # # # # #. # # # #\n",
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"# # # # # # #. # # # #\n",
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"# # # #...........E #\n",
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"# # # # # # # # # # # # # # # # # # # #\n"
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]
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}
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],
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"source": [
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"maze2 = builder.buildFromFile(test_lab3)\n",
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"\n",
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"solver = MazeSolver(maze2, BFS(), ConsoleView())\n",
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"stats = solver.solve()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 23,
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"id": "bf13d5ba",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Путь найден:\n",
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"# # # # # # # # # # # # # # # # # # # #\n",
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"S.......# # # #\n",
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"# # # .# # # # # # # # # # #\n",
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"#.......# # # # # # # # #\n",
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"#. # # # # # # # # # # # # #\n",
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"#...# ...........# # # # #\n",
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"# .# # #. # # # .# # # # # # #\n",
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"#...# #...# # .....# # # # #\n",
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"#. # # .# # # # .# # # # #\n",
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"#...# #...# #...# # # # #\n",
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"# .# #. # # # #. # # # # #\n",
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"#...# #..... # #.......# # # #\n",
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"#. # # # #...# # # # .# # # #\n",
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"#...#.......# .# #...# # #\n",
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"# .#.# # .#...# # # #. # # # # #\n",
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"#...#. #...#. # # #...# # # #\n",
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"#. #...#. #...# # # .# # # #\n",
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"#...# .#...# .# # # .# # # #\n",
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"# .....# .....# # .........E #\n",
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"# # # # # # # # # # # # # # # # # # # #\n"
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]
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}
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],
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"source": [
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"maze2 = builder.buildFromFile(test_lab3)\n",
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"\n",
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"solver = MazeSolver(maze2, DFS(), ConsoleView())\n",
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"stats = solver.solve()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "9383cb75",
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"metadata": {},
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"outputs": [],
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"source": []
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}
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