<LeetCode><Easy> 118 Pascal's Triangle
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Given numRows, generate the first numRows of Pascal's triangle.
For example, given numRows = 5,
Return
[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]]
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#Python2 40ms 递归
class Solution(object): def generate(self, numRows): """ :type numRows: int :rtype: List[List[int]] """ if not numRows:return [] if numRows==1:return [[1]] i,rows=1,[[1],] while i<numRows: i+=1 rows.append(map(lambda a,b:a+b,[0]+rows[-1],rows[-1]+[0])) return rows
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