题解 | 牛牛学数列
牛牛学数列
https://www.nowcoder.com/practice/0b97367cd2184c12a0e02f7c223aee11
import sys
n = int(input())
summ = 0
for i in range(2,n+1,2):
summ -= i
for i in range(1,n+1,2):
summ += i
print(summ)
Python代码
牛牛学数列
https://www.nowcoder.com/practice/0b97367cd2184c12a0e02f7c223aee11
import sys
n = int(input())
summ = 0
for i in range(2,n+1,2):
summ -= i
for i in range(1,n+1,2):
summ += i
print(summ)
Python代码
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