24 lines
419 B
Python
24 lines
419 B
Python
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import io
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import sys
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sys.stdin = io.StringIO('3') # 9
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sys.stdin = io.StringIO('2022') # 593300958
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# from itertools import permutations
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#
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# per = list(permutations(range(5)))
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# print(per)
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# 冒泡的交换次数公式
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# print(len(per))
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n = int(input())
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ans = 0
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per_num = 1
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for i in range(1, n + 1):
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for p in range(2, i + 1):
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per_num *= p
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ans += per_num // 2
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ans %= 998244353
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print(ans)
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