def triangles():
L = [1]
while True:
yield L
OLO = [0] + L + [0]
L = [OLO[i] + OLO[i + 1] for i in range(len(OLO) - 1)]
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画手
def triangles():
L = [1]
while True:
yield L
OLO = [0] + L + [0]
L = [OLO[i] + OLO[i + 1] for i in range(len(OLO) - 1)]