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;
scanf("%d",&n);//分奇偶，数学思想
if (0 == n%2) {
printf("%d",-n/2);
} else {
printf("%d",n/2+1);
}
return 0;
}
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