title: Swap All Odd And Even Bits
signature: int swapAllOddAndEvenBits(int x) {
test_code: #include <algorithm>
  #include <assert.h>
  #include <cstdlib>
  #include <iostream>
  #include <map>
  #include <set>
  #include <string>
  #include <tuple> 
  #include <unordered_map>
  #include <vector>
  #include <math.h>
  #include <cmath>
  #include <bits/stdc++.h>
  #include <numeric>
  #include <functional>
  
  using namespace std;
  
  // SOLUTION CODE
  // ============================================
  PLACEHOLDER_CODE_BODY
  
  // TESTING CODE 
  // ============================================
  bool validateSolution(int actual, int expected){
      return actual == expected;
  }
  
  string driver(int x, int expected){
      try
      {
          if (validateSolution(PLACEHOLDER_FN_NAME(x), expected)){
              return "PASSED";
          }
          return "FAILED";
      }
      catch (const std::overflow_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::runtime_error& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (const std::exception& exception_obj)
      {
          return typeid(exception_obj).name();
      }
      catch (...)
      {
          return "UNK_ERROR";
      }
  }
  
  int main() {
      string result = "";
  
      result = driver(99, 147); 
      cout << "TEST-" << 0 << "..."
           <<  result
           << "\n";
  
      result = driver(94, 173); 
      cout << "TEST-" << 1 << "..."
           <<  result
           << "\n";
  
      result = driver(11, 7); 
      cout << "TEST-" << 2 << "..."
           <<  result
           << "\n";
  
      result = driver(3, 3); 
      cout << "TEST-" << 3 << "..."
           <<  result
           << "\n";
  
      result = driver(77, 142); 
      cout << "TEST-" << 4 << "..."
           <<  result
           << "\n";
  
      result = driver(57, 54); 
      cout << "TEST-" << 5 << "..."
           <<  result
           << "\n";
  
      result = driver(54, 57); 
      cout << "TEST-" << 6 << "..."
           <<  result
           << "\n";
  
      result = driver(66, 129); 
      cout << "TEST-" << 7 << "..."
           <<  result
           << "\n";
  
      result = driver(98, 145); 
      cout << "TEST-" << 8 << "..."
           <<  result
           << "\n";
  
      result = driver(36, 24); 
      cout << "TEST-" << 9 << "..."
           <<  result
           << "\n";
  
      return 0;
  }
source_py: def swap_all_odd_and_even_bits(x):
      even_bits = (x & 2863311530)
      odd_bits = (x & 1431655765)
      even_bits >>= 1
      odd_bits <<= 1
      return (even_bits | odd_bits)
source_cpp: unsigned int swap_all_odd_and_even_bits(unsigned int x) {
    unsigned int even_bits = x & 0xAAAAAAAA;
    unsigned int odd_bits = x & 0x55555555;
    even_bits >>= 1;
    odd_bits <<= 1;
    return ( even_bits | odd_bits );
  }