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Merged
merged 2 commits into from
Mar 31, 2020
Merged

Create Solution.py #251

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789659e
Create Solution.py
qiaw99 Mar 29, 2020
3c6ea49
feat: add python solution
yanglbme Mar 31, 2020
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18 changes: 18 additions & 0 deletions solution/0100-0199/0118.Pascal's Triangle/Solution.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
class Solution:
def generate(self, numRows: int) -> List[List[int]]:
res = [[1], [1, 1]]
if numRows == 0:
return []
elif numRows == 1:
return [res[0]]

# from the 3. row on
for i in range(2, numRows):
counter = 1
temp = [1, 1]
# should add len(res[i - 1]) - 1 elements in to temp
for j in range(len(res[i - 1]) - 1):
temp.insert(counter, res[i - 1][j] + res[i - 1][j + 1])
counter += 1
res.append(temp)
return res