题解 | 牛牛学数列
牛牛学数列
https://www.nowcoder.com/practice/0b97367cd2184c12a0e02f7c223aee11
n=int(input())
i=1
s=0
while i<=n:
s+=((-1)**(i-1))*i
i=i+1
print(s)
牛牛学数列
https://www.nowcoder.com/practice/0b97367cd2184c12a0e02f7c223aee11
n=int(input())
i=1
s=0
while i<=n:
s+=((-1)**(i-1))*i
i=i+1
print(s)
相关推荐