solves #2520: Count the Digits That Divide a Number in java

Author: anishLearnsToCode

README.md

@@ -791,7 +791,7 @@
 | 2506 | [Count Pairs Of Similar Strings](https://leetcode.com/problems/count-pairs-of-similar-strings)                                                                         |                                                                                 [![Java](assets/java.png)](src/CountPairsOfSimilarStrings.java)                                                                                  |                                                                                                                                   |
 | 2511 | [Maximum Enemy Forts That Can Be Captured](https://leetcode.com/problems/maximum-enemy-forts-that-can-be-captured)                                                     |                                                                             [![Java](assets/java.png)](src/MaximumEnemyFortsThatCanBeCaptured.java)                                                                              |                                                                                                                                   |
 | 2515 | [Shortest Distance to Target String in a Circular Array](https://leetcode.com/problems/shortest-distance-to-target-string-in-a-circular-array)                         |                                                                       [![Java](assets/java.png)](src/ShortestDistanceToTargetStringInACircularArray.java)                                                                        |                                                                                                                                   |
-| 2520 | [Count the Digits That Divide a Number](https://leetcode.com/problems/count-the-digits-that-divide-a-number)                                                           |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2520 | [Count the Digits That Divide a Number](https://leetcode.com/problems/count-the-digits-that-divide-a-number)                                                           |                                                                               [![Java](assets/java.png)](src/CountTheDigitsThatDivideANumber.java)                                                                               |                                                                                                                                   |
 | 2525 | [Categorize Box According to Criteria](https://leetcode.com/problems/categorize-box-according-to-criteria)                                                             |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2529 | [Maximum Count of Positive Integer and Negative Integer](https://leetcode.com/problems/maximum-count-of-positive-integer-and-negative-integer)                         |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2535 | [Difference Between Element Sum and Digit Sum of an Array](https://leetcode.com/problems/difference-between-element-sum-and-digit-sum-of-an-array)                     |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/CountTheDigitsThatDivideANumber.java

@@ -0,0 +1,15 @@
+// https://leetcode.com/problems/count-the-digits-that-divide-a-number
+// T: O(log(N))
+// S: O(1)
+
+public class CountTheDigitsThatDivideANumber {
+    public int countDigits(int num) {
+        final String number = num + "";
+        int divisors = 0;
+        for (int index = 0 ; index < number.length() ; index++) {
+            int digit = number.charAt(index) - '0';
+            if (num % digit == 0) divisors++;
+        }
+        return divisors;
+    }
+}