added post: Reverse Bit [CF]

_posts/2016-05-22-reverse-bit-cf.md

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+---
+layout: post
+title:  "Reverse Bit [CF]"
+date:   2016-05-22 04:04:23 +0700
+categories: [python, codefights]
+---
+
+Author Question: **Giappi**
+
+I have an integer number, which I want to reverse by following steps:
+
+1. Convert the number into binary string.
+2. Reverse binary string.
+3. Convert the reversed binary string back to integer.
+
+Can you help me write a function to do it ?
+
+**Example**
+
+For `x = 234`, the output should be `ReverseBit(x) = 87`.
+
+`23410 = 111010102 => 010101112 = 8710`.
+
+**Input/Output**
+
+* **[input] integer x**
+  A non-negative integer.
+
+* **[output] integer**
+  x reversed as described above.
+
+**Solution:**
+
+```python
+def ReverseBit(x):
+  x = bin(x).replace('0b', '')
+  reverse_text = ''
+  for l in range(len(x)-1, -1, -1):
+      reverse_text = reverse_text + x[l]
+  return int(reverse_text, 2)
+
+>>> ReverseBit(234)
+87
+>>>
+```