简单枚举
与7无关的数
http://www.nowcoder.com/questionTerminal/776d401bf86d446fa783f0bef7d3c096
#include <stdio.h>
int main()
{
int n,i,sum;
while(scanf("%d",&n)!=EOF)
{
for(i=1,sum=0;i<=n;i++)
if(i%7!=0&&i%10!=7&&i/10!=7)
sum+=i*i;
printf("%d\n",sum);
}
} 
