回答編集履歴
1
無駄な lhs rhs 生成を排除
answer
CHANGED
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@@ -1,9 +1,9 @@
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1
1
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```Python
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2
2
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a=int(input("何段のピラミッド？"))
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3
3
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for i in range(a*3):
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4
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+
lhs = [a*3-i+6*n for n in range(1+i//3)]
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5
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+
rhs = [a*3+i+1-6*n for n in range(1+i//3)]
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4
6
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for j in range(a*3+i+2):
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5
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-
lhs = [a*3-i+6*n for n in range(1+i//3)]
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6
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-
rhs = [a*3+i+1-6*n for n in range(1+i//3)]
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7
7
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print('/' if j in lhs else '\' if j in rhs else '_' if i % 3 == 2 and lhs[0] < j < rhs[0] else ' ', end='')
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8
8
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print()
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9
9
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```
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