題目連結

題面：
A self-dividing number is a number that is divisible by every digit it contains.

For example, 128 is a self-dividing number because 128 % 1 == 0, 128 % 2 == 0, and 128 % 8 == 0.

Also, a self-dividing number is not allowed to contain the digit zero.

Given a lower and upper number bound, output a list of every possible self dividing number, including the bounds if possible.

Example 1:
Input:
left = 1, right = 22
Output: [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 15, 22]
Note:

The boundaries of each input argument are 1 <= left <= right <= 10000.

解題：
直接模擬即可。

class Solution {
public:
    bool flag=false,is_ok[10001];
    bool judge(int x)
    {
        int t=x;
        while
 
(x)
        {
            if(x%10==0)return false;
            if(t%(x%10))return false;
            x/=10;
        }
        return true;
    }
    void cal()
    {
        for(int i=1;i<=10000;i++)
        {
            if(judge(i))
                is_ok[i]=1;
            else
                is_ok[i]=0;
        }
        flag=true
 
;
    }
    vector<int> selfDividingNumbers(int left, int right) {
        vector <int> res;
        if(!flag){
            cal();
        }
        for(int i=left;i<=right;i++)
        {
            if(is_ok[i])
            res.push_back(i);
        }
        return res;
    }
};