Some solutions for the julia path

julia/secrets/HINTS.md

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+# Hints
+
+Some (not all) of the tests assume the value is `Int32`, so please avoid forcing it to be anything else.
+
+## 1. Shift back the bits
+
+- This is a right-shift.
+- Note the instruction that the results should be left-filled with zeros.
+
+## 2. Set some bits
+
+- Bits are set by bitwise OR with a mask. This is extremely common.
+
+## 3. Flip specific bits
+
+- There is an old joke among programmers that cryptographers discovered XOR and forgot to read the rest of the manual.
+
+## 4. Clear specific bits
+
+- Simple AND logic will do the opposite of what you need.
+- How do you flip all the bits in the mask?