feat: number-of-1-bits

Author: minji-go

number-of-1-bits/minji-go.java

@@ -0,0 +1,17 @@
+/**
+ * <a href="https://leetcode.com/problems/number-of-1-bits/">week03-2.number-of-1-bits</a>
+ * <li>Description: returns the number of set bits in its binary representation</li>
+ * <li>Topics: Divide and Conquer, Bit Manipulation </li>
+ * <li>Time Complexity: O(logN), Runtime 0ms        </li>
+ * <li>Space Complexity: O(1), Memory 41.95MB       </li>
+ */
+class Solution {
+    public int hammingWeight(int n) {
+        int count = 0;
+        while(n != 0) {
+            n &= (n-1);
+            count++;
+        }
+        return count;
+    }
+}