A few problems

number-of-1-bits/sol.rs

@@ -0,0 +1,12 @@
+impl Solution {
+    pub fn hammingWeight (n: u32) -> i32 {
+        (0..32).into_iter()
+            .fold(0, |acc, p| {
+                let compare_bit = 1 << p;
+                if n & compare_bit == compare_bit {
+                    return acc + 1;
+                }
+                acc
+            })
+    }
+}