Python

Pascal's TriangleII.py

class Solution:
    # @return a list of integers
    def getRow(self, rowIndex):
        if rowIndex<0:
            return None
        result=[0]*(rowIndex+1)
        result[0]=1
        
        for i in range(1,len(result)):
            result[i]=1
            for j in range(i-1, 0, -1):
                result[j]=result[j]+result[j-1]
        return result