diff --git a/Sources/LeetCode/LeetCode.swift b/Sources/LeetCode/LeetCode.swift
index 4fff6b2..14e7a36 100644
--- a/Sources/LeetCode/LeetCode.swift
+++ b/Sources/LeetCode/LeetCode.swift
@@ -9,15 +9,7 @@ import Foundation
 
 class LeetCode {
     func hammingWeight(_ n: Int) -> Int {
-        var weight = 0
-        let quotient = n / 2
-        weight += n % 2
-        let roundedQuotient = floor(Double(quotient))
-        if roundedQuotient != 0 {
-            weight += hammingWeight(Int(roundedQuotient))
-        }
-
-        return weight
+        return n == 0 ? 0 : (n & 1) + hammingWeight(n >> 1)
     }
 
     func singleNumber(_ nums: [Int]) -> Int {
diff --git a/Sources/LeetCode/main.swift b/Sources/LeetCode/main.swift
index 9238e25..eae89ad 100644
--- a/Sources/LeetCode/main.swift
+++ b/Sources/LeetCode/main.swift
@@ -10,4 +10,4 @@ let code = LeetCode()
 // print(code.hammingWeight(2_147_483_645))
 // print(code.singleNumber([4, 1, 2, 1, 2]))
 // print(code.containsDuplicate([1, 2, 3, 4]))
-print(code.productExceptSelf([-1, 1, 0, -3, 3]))
+// print(code.productExceptSelf([-1, 1, 0, -3, 3]))