排它平方数 - 永不冷�龅娜松�


排它平方数 - 永不冷�龅娜松�
小明正看着 203879 这个数字发呆。 原来,203879 * 203879 = 41566646641这有什么神奇呢?仔细观察,203879 是个6位数,并且它的每个数位上的数字都是不同的,并且它平方后的所有数位上都不出现组成它自身的数字。具有这样特点的6位数还有一个,请你找出它!
再归纳一下筛选要求:
  1. 6位正整数
  2. 每个数位上的数字不同
  3. 其平方数的每个数位不含原数字的任何组成数位
答案是一个6位的正整数。
int judge(long i)

{

    long temp = i;

    int t[10] = {0};

    for(int m=0;m<6;m++)

    {

        int j = i%10;

        t[j]++;

        i/=10;

    }

    for (int m=0; m<10; m++) {

        if(t[m]>1)

            return 0;

    }

 

    //判断平方数

    int p = 0;

    for(long n=temp*temp; n!=0 ;p++)

    {

        if(t[n%10]!=0)

            return 0;

        n/=10;

    }

 

    return 1;

}

int main()

{

    for (long i=1000000;i<999999;i++)

    {

        if(judge(i))

        {

            printf("%ld\n",i);

        }

    }

}
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