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
.
题解如下:
class Solution {
public List<Integer> selfDividingNumbers(int left, int right) {
List<Integer> res = new ArrayList<>();
for(int num = left;num <= right;num++) {
if(isTargetNum(num)) {
res.add(num);
}
}
return res;
}
public boolean isTargetNum(int num) {
char[] arr = String.valueOf(num).toCharArray();
for(char c : arr) {
if(c == '0' || num % (c - '0') > 0)
return false;
}
return true;
}
}