pascals_triangle2.py (532B)
| # 119. Pascal's Triangle II
"""
given an integer 'row_index', return the 'row_index'th row of the pascals
triangle. in pascals triangle, each number is the sum of the two numbers
directly above it as shown.
"""
class Solution(object):
def getRow(self, row_index):
row = [1]
for _ in range(row_index):
row = [x + y for x, y in zip([0] + row, row + [0])]
return row
if __name__ == "__main__":
obj = Solution()
print(obj.getRow(3))
print(obj.getRow(0))
print(obj.getRow(1))
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