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Java-based LeetCode algorithm problem solutions, regularly updated
package g0701_0800.s0728_self_dividing_numbers;
// #Easy #Math #2022_03_24_Time_1_ms_(100.00%)_Space_39.8_MB_(88.16%)
import java.util.ArrayList;
import java.util.List;
/**
* 728 - Self Dividing Numbers\.
*
* Easy
*
* 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`.
*
* A **self-dividing number** is not allowed to contain the digit zero.
*
* Given two integers `left` and `right`, return _a list of all the **self-dividing numbers** in the range_ `[left, right]`.
*
* **Example 1:**
*
* **Input:** left = 1, right = 22
*
* **Output:** [1,2,3,4,5,6,7,8,9,11,12,15,22]
*
* **Example 2:**
*
* **Input:** left = 47, right = 85
*
* **Output:** [48,55,66,77]
*
* **Constraints:**
*
* * 1 <= left <= right <= 104
**/
public class Solution {
public List selfDividingNumbers(final int left, final int right) {
final List list = new ArrayList<>();
for (int i = left; i <= right; i++) {
if (isSelfDividing(i)) {
list.add(i);
}
}
return list;
}
private boolean isSelfDividing(int value) {
final int origin = value;
while (value != 0) {
final int digit = value % 10;
value /= 10;
if (digit == 0 || origin % digit != 0) {
return false;
}
}
return true;
}
}
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