def triangles():
t = [1]
while True:
yield t
t = [0] + t
for i in range(len(t)-1):
t[i] = t[i] + t[i+1]
pass
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彼苍_有梦想
def triangles():
t = [1]
while True:
yield t
t = [0] + t
for i in range(len(t)-1):
t[i] = t[i] + t[i+1]
pass