solves #2138: Divide a String Into Groups of Size k in java

Author: anishLearnsToCode

README.md

@@ -706,7 +706,7 @@
 | 2124 | [Check if All A's Appears Before All B's](https://leetcode.com/problems/check-if-all-as-appears-before-all-bs)                                                         |                                                                             [![Java](assets/java.png)](src/CheckIfAllTheAsAppearBeforeAllTheBs.java)                                                                             |                                                                                                                                   |
 | 2129 | [Capitalize the Title](https://leetcode.com/problems/capitalize-the-title)                                                                                             |                                                                                     [![Java](assets/java.png)](src/CapitalizeTheTitle.java)                                                                                      |                                                                                                                                   |
 | 2133 | [Check if Every Row and Column Contains All Numbers](https://leetcode.com/problems/check-if-every-row-and-column-contains-all-numbers)                                 |                                                                       [![Java](assets/java.png)](src/CheckIfEveryRowAndEveryColumnContainAllNumbers.java)                                                                        |                                                                                                                                   |
-| 2138 | [Divide a String Into Groups of Size k](https://leetcode.com/problems/divide-a-string-into-groups-of-size-k)                                                           |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2138 | [Divide a String Into Groups of Size k](https://leetcode.com/problems/divide-a-string-into-groups-of-size-k)                                                           |                                                                              [![Java](assets/java.png)](src/DivideTheStringIntoGroupsOfSizeK.java)                                                                               |                                                                                                                                   |
 | 2144 | [Minimum Cost of Buying Candies With Discount](https://leetcode.com/problems/minimum-cost-of-buying-candies-with-discount)                                             |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2148 | [Count Elements With Strictly Smaller and Greater Elements](https://leetcode.com/problems/count-elements-with-strictly-smaller-and-greater-elements)                   |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2154 | [Keep Multiplying Found Values by Two](https://leetcode.com/problems/keep-multiplying-found-values-by-two)                                                             |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/DesignBrowserHistory.java

@@ -1,3 +1,6 @@
+import java.util.ArrayList;
+import java.util.List;
+
 class BrowserHistory {
     private List<String> history;
     private int ptr;

src/DivideTheStringIntoGroupsOfSizeK.java

@@ -0,0 +1,22 @@
+// https://leetcode.com/problems/divide-a-string-into-groups-of-size-k
+// T: O(s)
+// S: O(s)
+
+public class DivideTheStringIntoGroupsOfSizeK {
+    public String[] divideString(String s, int k, char fill) {
+        final String filler = fill + "";
+        final int groups = (int) Math.ceil((double) s.length() / k);
+        final String[] result = new String[groups];
+
+        for (int i = 0 ; i < groups ; i++) {
+            if (i == result.length - 1) {
+                if (s.length() - k * i < k) result[i] = s.substring(k * i) + filler.repeat(k - s.length() + k * i);
+                else result[i] = s.substring(k * i);
+            } else {
+                result[i] = s.substring(k * i, k * i + k);
+            }
+        }
+
+        return result;
+    }
+}