2021 day 4
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81
2021/04/04.py
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81
2021/04/04.py
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# get input
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with open("input.txt") as f:
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lines = f.read().split('\n\n')
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raw_numbers = lines[0]
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raw_boards = lines[1:]
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# define a structure for our bingo game
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class Board:
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def __init__(self, points):
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self.unmarked = set()
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self.marked = set()
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for point in points:
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self.unmarked.add(point) # all points are unmarked at start of game
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def __repr__(self):
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return f"\nmarked = {self.marked}\nunmarked = {sorted(self.unmarked)}\n"
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def is_bingo(self):
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# we need to count rows and columns (diagonals don't count)
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i_vals = []
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j_vals = []
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for point in self.marked:
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i, j, _ = point
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i_vals.append(i)
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j_vals.append(j)
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from collections import Counter
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i_count = Counter(i_vals)
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j_count = Counter(j_vals)
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# bingo is called if there are 5 in a row or column;
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# luckily, diagonals don't count
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return ( ( 5 in i_count.values() ) or ( 5 in j_count.values() ) )
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def score(self, last_number):
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score = 0
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# "start by finding the sum of all unmarked numbers"
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for point in self.unmarked:
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_, _, value = point
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score += value
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# "then, multiply that sum by the number that was just called"
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score *= last_number
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return score
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# parse input
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numbers = [int(number) for number in raw_numbers.split(',')]
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boards = set()
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for board in raw_boards:
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points = set(
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(i,j,int(value))
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for i, row in enumerate(board.split('\n'))
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for j, value in enumerate(row.split())
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)
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boards.add(Board(points))
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# game loop
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def part1(numbers, boards):
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for number in numbers: # call a number
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for board in boards: # then check the boards
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for point in board.unmarked: # point by point.
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_, _, value = point
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if value == number: # if there is a match,
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board.unmarked.remove(point) # then it is no longer unmarked
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board.marked.add(point) # and it should be tracked as marked.
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break # we also don't need to continue checking, since numbers are unique.
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if board.is_bingo(): # once bingo is called,
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return board.score(number) # we can calculate our score with that last number.
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print(part1(numbers, boards))
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# game loop 2 -- this time we wanna lose
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def part2(numbers, boards):
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for number in numbers: # call a number
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for board in boards.copy(): # then check the boards
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for point in board.unmarked: # point by point.
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_, _, value = point
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if value == number: # if there is a match,
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board.unmarked.remove(point) # then it is no longer unmarked
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board.marked.add(point) # and it should be tracked as marked.
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break # we also don't need to continue checking, since numbers are unique.
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if len(boards) == 1 and board.is_bingo(): # if this is the last bingo'd board,
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return board.score(number) # then we can calculate our score.
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elif board.is_bingo(): # otherwise we still have more boards to check
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boards.remove(board) # so we just throw it away.
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print(part2(numbers, boards))
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80
2021/04/04_refactored.py
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80
2021/04/04_refactored.py
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# get input
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with open("input.txt") as f:
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lines = f.read().split('\n\n')
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raw_numbers = lines[0]
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raw_boards = lines[1:]
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# define a structure for our bingo game
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class Board:
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def __init__(self, points):
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self.unmarked = set()
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self.marked = set()
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for point in points:
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self.unmarked.add(point) # all points are unmarked at start of game
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def __repr__(self):
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return f"\nmarked = {self.marked}\nunmarked = {sorted(self.unmarked)}\n"
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def is_bingo(self):
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# we need to count rows and columns (diagonals don't count)
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i_vals = []
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j_vals = []
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for point in self.marked:
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i, j, _ = point
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i_vals.append(i)
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j_vals.append(j)
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from collections import Counter
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i_count = Counter(i_vals)
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j_count = Counter(j_vals)
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# bingo is called if there are 5 in a row or column;
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# luckily, diagonals don't count
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return ( ( 5 in i_count.values() ) or ( 5 in j_count.values() ) )
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def score(self, last_number):
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score = 0
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# "start by finding the sum of all unmarked numbers"
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for point in self.unmarked:
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_, _, value = point
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score += value
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# "then, multiply that sum by the number that was just called"
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score *= last_number
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return score
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# parse input
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numbers = [int(number) for number in raw_numbers.split(',')]
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boards = set()
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for board in raw_boards:
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points = set(
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(i,j,int(value))
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for i, row in enumerate(board.split('\n'))
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for j, value in enumerate(row.split())
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)
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boards.add(Board(points))
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# refactor out common code
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def check_board(board, number):
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for point in board.unmarked: # point by point.
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_, _, value = point
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if value == number: # if there is a match,
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board.unmarked.remove(point) # then it is no longer unmarked
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board.marked.add(point) # and it should be tracked as marked.
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break # we also don't need to continue checking, since numbers are unique.
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# game loop
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def part1(numbers, boards):
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for number in numbers: # call a number
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for board in boards: # then check the boards
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check_board(board, number)
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if board.is_bingo(): # once bingo is called,
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return board.score(number) # we can calculate our score with that last number.
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print(part1(numbers, boards))
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# game loop 2 -- this time we wanna lose
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def part2(numbers, boards):
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for number in numbers: # call a number
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for board in boards.copy(): # then check the boards
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check_board(board, number)
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if len(boards) == 1 and board.is_bingo(): # if this is the last bingo'd board,
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return board.score(number) # then we can calculate our score.
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elif board.is_bingo(): # otherwise we still have more boards to check
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boards.remove(board) # so we just throw it away.
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print(part2(numbers, boards))
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601
2021/04/input.txt
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601
2021/04/input.txt
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59,91,13,82,8,32,74,96,55,51,19,47,46,44,5,21,95,71,48,60,68,81,80,14,23,28,26,78,12,22,49,1,83,88,39,53,84,37,93,24,42,7,56,20,92,90,25,36,34,52,27,50,85,75,89,63,33,4,66,17,98,57,3,9,54,0,94,29,79,61,45,86,16,30,77,76,6,38,70,62,72,43,69,35,18,97,73,41,40,64,67,31,58,11,15,87,65,2,10,99
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80 38 51 96 91
|
||||
|
||||
45 41 80 64 32
|
||||
14 93 40 76 70
|
||||
15 77 49 0 98
|
||||
19 68 16 18 92
|
||||
81 83 47 36 44
|
||||
|
||||
56 3 88 97 72
|
||||
60 46 98 11 51
|
||||
52 8 54 89 9
|
||||
67 41 78 17 82
|
||||
99 2 6 7 77
|
||||
|
||||
66 20 48 64 9
|
||||
19 52 74 56 59
|
||||
42 81 29 93 6
|
||||
72 75 83 15 76
|
||||
99 23 14 44 50
|
||||
|
||||
77 90 79 49 3
|
||||
51 76 2 41 74
|
||||
86 96 36 84 16
|
||||
85 5 95 18 47
|
||||
73 33 32 45 58
|
||||
|
||||
82 72 86 18 84
|
||||
59 60 6 22 7
|
||||
31 19 90 47 58
|
||||
65 71 4 67 92
|
||||
17 95 44 35 26
|
||||
|
||||
14 81 55 51 29
|
||||
44 64 99 41 43
|
||||
82 72 53 33 10
|
||||
95 38 76 68 56
|
||||
57 88 39 0 5
|
||||
|
||||
15 47 2 78 9
|
||||
13 36 41 29 97
|
||||
86 18 57 69 49
|
||||
79 37 91 88 59
|
||||
21 23 87 1 30
|
||||
|
||||
39 45 56 8 89
|
||||
2 42 66 3 70
|
||||
75 80 17 64 97
|
||||
32 35 60 23 88
|
||||
18 51 99 7 38
|
||||
|
||||
30 54 83 88 74
|
||||
52 15 91 77 86
|
||||
2 79 12 16 50
|
||||
40 14 97 63 35
|
||||
33 71 25 21 94
|
||||
|
||||
37 85 35 10 22
|
||||
52 31 77 48 82
|
||||
51 3 49 95 20
|
||||
24 75 0 89 97
|
||||
78 63 14 46 42
|
||||
|
||||
91 26 28 38 31
|
||||
55 32 0 95 10
|
||||
68 25 45 57 56
|
||||
36 14 69 30 15
|
||||
81 3 37 13 40
|
||||
|
||||
75 30 8 28 44
|
||||
60 79 59 74 9
|
||||
81 50 66 92 61
|
||||
29 2 88 15 99
|
||||
87 91 26 7 96
|
||||
|
||||
74 75 81 72 89
|
||||
44 8 94 3 97
|
||||
93 46 37 0 56
|
||||
63 21 29 91 55
|
||||
41 4 31 49 33
|
||||
|
||||
55 8 57 29 63
|
||||
85 36 58 89 33
|
||||
44 75 67 23 39
|
||||
49 46 32 10 84
|
||||
15 7 59 56 12
|
||||
|
||||
1 91 65 67 4
|
||||
31 5 34 30 37
|
||||
93 66 18 79 19
|
||||
28 6 0 47 42
|
||||
21 98 87 89 81
|
||||
|
||||
79 30 10 21 69
|
||||
56 19 27 90 72
|
||||
77 57 93 92 97
|
||||
15 45 4 18 68
|
||||
59 2 29 26 83
|
||||
|
||||
21 41 53 30 31
|
||||
85 18 17 52 39
|
||||
49 38 4 57 54
|
||||
63 74 59 16 8
|
||||
66 62 27 10 37
|
||||
|
||||
28 94 59 97 5
|
||||
91 17 72 84 80
|
||||
21 6 60 77 98
|
||||
50 70 44 85 95
|
||||
92 61 43 16 93
|
||||
|
||||
10 91 27 84 63
|
||||
69 97 9 83 89
|
||||
6 47 42 87 77
|
||||
20 94 34 4 64
|
||||
0 12 38 39 18
|
||||
|
||||
4 54 55 76 64
|
||||
39 15 80 42 9
|
||||
57 56 87 61 28
|
||||
70 85 36 25 75
|
||||
38 53 12 71 47
|
||||
|
||||
83 97 32 29 0
|
||||
60 30 31 92 61
|
||||
1 42 17 94 67
|
||||
20 39 36 91 10
|
||||
18 69 47 43 76
|
||||
|
||||
63 74 68 71 92
|
||||
85 94 8 41 35
|
||||
39 32 62 67 87
|
||||
70 95 40 84 51
|
||||
52 30 53 22 1
|
||||
|
||||
17 39 74 50 55
|
||||
72 7 88 4 68
|
||||
94 91 45 15 77
|
||||
48 53 62 46 67
|
||||
69 12 70 32 35
|
||||
|
||||
56 89 96 51 14
|
||||
23 77 62 4 22
|
||||
88 87 27 5 94
|
||||
6 28 40 11 83
|
||||
33 86 99 80 63
|
||||
|
||||
2 96 16 33 81
|
||||
18 9 45 39 49
|
||||
3 21 59 27 58
|
||||
48 31 28 42 77
|
||||
37 83 61 25 71
|
||||
|
||||
13 1 6 34 23
|
||||
56 40 66 50 99
|
||||
46 28 65 32 27
|
||||
60 67 22 17 0
|
||||
29 43 21 8 59
|
||||
|
||||
90 86 69 22 5
|
||||
72 96 29 62 59
|
||||
40 1 54 87 55
|
||||
41 78 28 43 33
|
||||
77 49 82 13 61
|
||||
|
||||
82 8 39 68 51
|
||||
97 13 22 7 92
|
||||
60 88 84 16 30
|
||||
86 54 71 50 87
|
||||
72 24 41 25 48
|
||||
|
||||
9 35 43 49 77
|
||||
24 29 1 70 80
|
||||
15 4 93 48 6
|
||||
31 17 0 99 95
|
||||
28 13 56 41 97
|
||||
|
||||
24 75 16 59 98
|
||||
86 5 7 93 10
|
||||
42 71 6 91 21
|
||||
43 69 78 94 33
|
||||
3 45 73 11 20
|
||||
|
||||
19 3 17 58 89
|
||||
11 54 53 34 14
|
||||
66 82 44 46 41
|
||||
1 22 62 69 25
|
||||
65 98 76 84 13
|
||||
|
||||
37 93 47 15 20
|
||||
43 46 82 53 75
|
||||
18 90 25 69 92
|
||||
54 42 83 41 17
|
||||
44 14 22 70 4
|
||||
|
||||
78 72 96 86 89
|
||||
64 61 69 79 85
|
||||
10 59 37 18 46
|
||||
5 22 31 81 7
|
||||
40 57 53 66 32
|
||||
|
||||
8 77 33 81 90
|
||||
27 2 94 24 59
|
||||
79 28 30 97 60
|
||||
32 18 10 1 38
|
||||
58 12 5 87 17
|
||||
|
||||
68 76 4 63 16
|
||||
75 66 19 50 14
|
||||
73 24 22 6 33
|
||||
99 61 87 1 47
|
||||
35 83 48 39 20
|
||||
|
||||
42 39 28 87 37
|
||||
89 12 75 82 84
|
||||
17 74 49 3 5
|
||||
56 76 66 92 85
|
||||
27 18 86 8 58
|
||||
|
||||
71 83 21 29 63
|
||||
46 38 62 3 67
|
||||
56 72 40 96 64
|
||||
95 89 91 4 47
|
||||
7 92 80 69 61
|
||||
19
2021/04/sample.txt
Normal file
19
2021/04/sample.txt
Normal file
|
|
@ -0,0 +1,19 @@
|
|||
7,4,9,5,11,17,23,2,0,14,21,24,10,16,13,6,15,25,12,22,18,20,8,19,3,26,1
|
||||
|
||||
22 13 17 11 0
|
||||
8 2 23 4 24
|
||||
21 9 14 16 7
|
||||
6 10 3 18 5
|
||||
1 12 20 15 19
|
||||
|
||||
3 15 0 2 22
|
||||
9 18 13 17 5
|
||||
19 8 7 25 23
|
||||
20 11 10 24 4
|
||||
14 21 16 12 6
|
||||
|
||||
14 21 17 24 4
|
||||
10 16 15 9 19
|
||||
18 8 23 26 20
|
||||
22 11 13 6 5
|
||||
2 0 12 3 7
|
||||
Loading…
Reference in a new issue