class Solution(object):
# def convert(self, s, numRows):
# """
# :type s: str
# :type numRows: int
# :rtype: str
# """
# ls = len(s)
# if ls <= 1 or numRows == 1:
# return s
# temp_s = []
# for i in range(numRows):
# temp_s.append(['']*(ls / 2))
# inter = numRows - 1
# col, row = 0, 0
# for i, ch in enumerate(s):
# flag = True
# if (i / inter) % 2 == 1:
# # print i
# flag = False
# if flag:
# temp_s[row][col] = ch
# row += 1
# else:
# temp_s[row][col] = ch
# col += 1
# row -= 1
# result = ''
# for i in range(numRows):
# result += ''.join(temp_s[i])
# return result
def convert(self, s, numRows):
# https://leetcode.com/discuss/90908/easy-python-o-n-solution-94%25-with-explanations
if numRows == 1:
return s
# calculate period
p = 2 * (numRows - 1)
result = [""] * numRows
for i in xrange(len(s)):
floor = i % p
if floor >= p//2:
floor = p - floor
result[floor] += s[i]
return "".join(result)
if __name__ == '__main__':
# begin
s = Solution()
print s.convert("PAYPALISHIRING", 3)
Download ZigZag Conversion.pyLeetcode 006 ZigZag Conversion problem solution in python3 with explanation. This is the best place to expand your knowledge and get prepared for your next interview.
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