43. Multiply Strings
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class Solution(object):
def multiply(self, num1, num2):
"""
:type num1: str
:type num2: str
:rtype: str
"""
res = [0]* (len(num1) + len(num2))
for i, e1 in enumerate(reversed(num1)):
for j, e2 in enumerate(reversed(num2)):
res[i+j] += int(e1) * int(e2)
res[i+j+1] += res[i+j]/10
res[i+j] %= 10
while len(res) > 1 and res[-1] == 0: res.pop()
def multiply(self, num1, num2):
"""
:type num1: str
:type num2: str
:rtype: str
"""
res = [0]* (len(num1) + len(num2))
for i, e1 in enumerate(reversed(num1)):
for j, e2 in enumerate(reversed(num2)):
res[i+j] += int(e1) * int(e2)
res[i+j+1] += res[i+j]/10
res[i+j] %= 10
while len(res) > 1 and res[-1] == 0: res.pop()
return ''.join( map(str,res[::-1]) )
https://discuss.leetcode.com/topic/20883/simple-python-solution-18-lines
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