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#!/opt/local/bin/python
#
# See ../README.md
#
#
# Run as python ch-1.py < input-file
#
from math import floor, sqrt
import sys
RIGHT = 0
UP = 1
LEFT = 2
DOWN = 3
#
# Fetch data
#
elements = input () . split ()
#
# Find the optimal width and height
#
count = len (elements)
height = floor (sqrt (count))
while count % height:
height = height - 1
width = floor (count / height)
#
# Initialize the matrix
#
min_x = 0
max_x = height - 1
min_y = 0
max_y = width - 1
matrix = [[0] * width for x in range (height)]
#
# Fill the matrix, starting at the bottom left
#
x = max_x
y = min_y
direction = RIGHT
for element in elements:
matrix [x] [y] = element
turn = False
if direction == RIGHT:
if y >= max_y:
turn = True; x = x - 1; max_x = max_x - 1
else:
y = y + 1
if direction == UP:
if x <= min_x:
turn = True; y = y - 1; max_y = max_y - 1
else:
x = x - 1
if direction == LEFT:
if y <= min_y:
turn = True; x = x + 1; min_x = min_x + 1
else:
y = y - 1
if direction == DOWN:
if x >= max_x:
turn = True; y = y + 1; min_y = min_y + 1
else:
x = x + 1
if turn:
direction = direction + 1
direction = direction % 4
#
# Find the widths of each column
#
widths = [0] * width
for y in range (width):
max = 0
for x in range (height):
if max < len (matrix [x] [y]):
max = len (matrix [x] [y])
widths [y] = max
#
# Print the matrix
#
for x in range (height):
for y in range (width):
if y > 0:
sys . stdout . write (" ")
#
# Format the entry. Format will look something like '{:>Ws}',
# where W is the width of the column.
#
sys . stdout . write (("{:>" + str (widths [y]) + "s}") .
format (matrix [x] [y]))
sys . stdout . write ("\n")
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