message: Added AbsoluteValue
diff: // { Driver Code Starts
  #include <bits/stdc++.h>
  using namespace std;
  +#define CHARBIT 8
  // } Driver Code Ends
  // User function Template for C++
  @@ -11,6 +12,8 @@ public:
  int absolute(int I)
  {
  // Your code goes here
  + int const mask = I >> (sizeof(int) * CHARBIT - 1);
  + return ((I + mask) ^ mask);
  }
  };
  