Add week 1 solutions: number-of-1-bits

Author: gitsunmin

number-of-1-bits/gitsunmin.ts

@@ -0,0 +1,8 @@
+/**
+ * https://leetcode.com/problems/number-of-1-bits/
+ * time complexity : O(log n)
+ * space complexity : O(log n)
+ */
+function hammingWeight(n: number): number {
+    return n.toString(2).replaceAll('0', '').length
+}