题解 | #牛牛学数列#
牛牛学数列
https://www.nowcoder.com/practice/0b97367cd2184c12a0e02f7c223aee11
#include <stdio.h>
int main() {
int n = 0;
scanf("%d",&n);
int sum = 0;
for(int i = 1;i <= n;i++)
{
if(i % 2 != 0)
sum += i;
else
sum -= i;
}
printf("%d",sum);
return 0;
}
就是在循环里面加上对奇偶的判断。
