solves #2180 Count Integers With Even Digit Sum in java

Author: anishLearnsToCode

Diff for: README.md

@@ -707,14 +707,14 @@
 | 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)                                                           |                                                                              [![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)                                             |                                                                                [![Java](assets/java.png)](src/CountIntegersWithEvenDigitSum.java)                                                                                |                                                                                                                                   |
+| 2144 | [Minimum Cost of Buying Candies With Discount](https://leetcode.com/problems/minimum-cost-of-buying-candies-with-discount)                                             |                                                                           [![Java](assets/java.png)](src/MinimumCostOfBuyingCandiesWithDiscount.java)                                                                            |                                                                                                                                   |
 | 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)                                                             |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2160 | [Minimum Sum of Four Digit Number After Splitting Digits](https://leetcode.com/problems/minimum-sum-of-four-digit-number-after-splitting-digits)                       |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2164 | [Sort Even and Odd Indices Independently](https://leetcode.com/problems/sort-even-and-odd-indices-independently)                                                       |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2169 | [Count Operations to Obtain Zero](https://leetcode.com/problems/count-operations-to-obtain-zero)                                                                       |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2176 | [Count Equal and Divisible Pairs in an Array](https://leetcode.com/problems/count-equal-and-divisible-pairs-in-an-array)                                               |                                                                                                                                                                                                                                  |                                                                                                                                   |
-| 2180 | [Count Integers With Even Digit Sum](https://leetcode.com/problems/count-integers-with-even-digit-sum)                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2180 | [Count Integers With Even Digit Sum](https://leetcode.com/problems/count-integers-with-even-digit-sum)                                                                 |                                                                                [![Java](assets/java.png)](src/CountIntegersWithEvenDigitSum.java)                                                                                |                                                                                                                                   |
 | 2185 | [Counting Words With a Given Prefix](https://leetcode.com/problems/counting-words-with-a-given-prefix)                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2190 | [Most Frequent Number Following Key In an Array](https://leetcode.com/problems/most-frequent-number-following-key-in-an-array)                                         |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2194 | [Cells in a Range on an Excel Sheet](https://leetcode.com/problems/cells-in-a-range-on-an-excel-sheet)                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |

Diff for: src/MinimumCostOfBuyingCandiesWithDiscount.java

@@ -0,0 +1,16 @@
+// https://leetcode.com/problems/minimum-cost-of-buying-candies-with-discount
+// T: O(n log(n))
+// S: O(log(n))
+
+import java.util.Arrays;
+
+public class MinimumCostOfBuyingCandiesWithDiscount {
+    public int minimumCost(int[] cost) {
+        Arrays.sort(cost);
+        int totalCost = 0;
+        for (int index = cost.length - 1 ; index >= 0 ; index -= 3) {
+            totalCost += cost[index] + (index - 1 >= 0 ? cost[index - 1] : 0);
+        }
+        return totalCost;
+    }
+}