4-line Python


  • 0
    class Solution(object):
        def generate(self, numRows):
            """
            :type numRows: int
            :rtype: List[List[int]]
            """
            ans = [[1] * n for n in xrange(1, numRows + 1)]
            for i in range(1, numRows + 1):
                for j in range(0, i - 2):
                    ans[i - 1][1 + j] = ans[i - 2][j] + ans[i - 2][j + 1]
            return ans
    

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