原本是80%，但想到了2也是偶数，但不能做到要求！

#include<stdio.h>
int main()
{
    int n;
    scanf("%d",&n);
    if(n%2==0&&n>2)
       printf("YES, you can divide the watermelon into two even parts.");
     else
       printf("NO, you can't divide the watermelon into two even parts.");
}