题解 | #牛牛学数列#
牛牛学数列
https://ac.nowcoder.com/acm/problem/22156
#数列 def func(n): if n % 2 == 0: return -(n // 2) else: return (n + 1) // 2
n = int(input()) sum = func(n) print(sum)
牛牛学数列
https://ac.nowcoder.com/acm/problem/22156
#数列 def func(n): if n % 2 == 0: return -(n // 2) else: return (n + 1) // 2
n = int(input()) sum = func(n) print(sum)
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