先判断是否大于50我感觉更好
#include<cstdio>
int main()
{
int n;
scanf("%d",&n);
if(n>50)
}
else printf("no\n");
return 0;
int main()
{
int n;
scanf("%d",&n);
if(n>50)
{if(n%2==0) printf("yes\n");
}
else printf("no\n");
return 0;
}