solve #2859: Sum of Values at Indices With K Set Bits in java

Author: anishLearnsToCode

Diff for: README.md

@@ -855,7 +855,7 @@
 | 2843 | [Count Symmetric Integers](https://leetcode.com/problems/count-symmetric-integers)                                                                                     |                                                                                   [![Java](assets/java.png)](src/CountSymmetricIntegers.java)                                                                                    |                                                                                                                                   |
 | 2848 | [Points That Intersect With Cars](https://leetcode.com/problems/points-that-intersect-with-cars)                                                                       |                                                                                 [![Java](assets/java.png)](src/PointsThatIntersectWithCars.java)                                                                                 |                                                                                                                                   |
 | 2855 | [Minimum Right Shifts to Sort the Array](https://leetcode.com/problems/minimum-right-shifts-to-sort-the-array)                                                         |                                                                              [![Java](assets/java.png)](src/MinimumRightShiftsToSortTheArray.java)                                                                               |                                                                                                                                   |
-| 2859 | [Sum of Values at Indices With K Set Bits](https://leetcode.com/problems/sum-of-values-at-indices-with-k-set-bits)                                                     |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2859 | [Sum of Values at Indices With K Set Bits](https://leetcode.com/problems/sum-of-values-at-indices-with-k-set-bits)                                                     |                                                                              [![Java](assets/java.png)](src/SumOfValuesAtIndicesWithKSetBits.java)                                                                               |                                                                                                                                   |
 | 2833 | [Furthest Point From Origin](https://leetcode.com/problems/furthest-point-from-origin)                                                                                 |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2839 | [Check if Strings Can be Made Equal With Operations I](https://leetcode.com/problems/check-if-strings-can-be-made-equal-with-operations-i)                             |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2843 | [Count Symmetric Integers](https://leetcode.com/problems/count-symmetric-integers)                                                                                     |                                                                                                                                                                                                                                  |                                                                                                                                   |

Diff for: src/SumOfValuesAtIndicesWithKSetBits.java

@@ -0,0 +1,26 @@
+// https://leetcode.com/problems/sum-of-values-at-indices-with-k-set-bits
+// T: O(N)
+// S: O(1)
+
+import java.util.List;
+
+public class SumOfValuesAtIndicesWithKSetBits {
+    public int sumIndicesWithKSetBits(List<Integer> array, int k) {
+        int sum = 0;
+        for (int i = 0 ; i < array.size() ; i++) {
+            if (numberOfSetBits(i) == k) {
+                sum += array.get(i);
+            }
+        }
+        return sum;
+    }
+
+    private static int numberOfSetBits(int number) {
+        int setBits = 0;
+        while (number > 0) {
+            setBits += number % 2;
+            number /= 2;
+        }
+        return setBits;
+    }
+}