contract token { /* Public variables of the token */ string public name; string public symbol; uint8 public decimals; uint256 public totalSupply;

/* This creates an array with all balances */
  mapping (address => uint256) public balanceOf;
  mapping (address => mapping (address => uint256)) public allowance;

  /* This generates a public event on the blockchain that will notify clients */
  event Transfer(address indexed from, address indexed to, uint256 value);

  /* This notifies clients about the amount burnt */
  event Burn(address indexed from, uint256 value);

  /* Initializes contract with initial supply tokens to the creator of the contract */
  function token(
      uint256 initialSupply,
      string tokenName,
      uint8 decimalUnits,
      string tokenSymbol
      ) {
      balanceOf[msg.sender] = initialSupply;              // Give the creator all initial tokens
      totalSupply = initialSupply;                        // Update total supply
      name = tokenName;                                   // Set the name for display purposes
      symbol = tokenSymbol;                               // Set the symbol for display purposes
      decimals = decimalUnits;                            // Amount of decimals for display purposes
  }

  /* Internal transfer, only can be called by this contract */
  function _transfer(address _from, address _to, uint _value) internal {
      require (_to != 0x0);                               // Prevent transfer to 0x0 address. Use burn() instead
      require (balanceOf[_from] > _value);                // Check if the sender has enough
      require (balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
      balanceOf[_from] -= _value;                         // Subtract from the sender
      balanceOf[_to] += _value;                            // Add the same to the recipient
      Transfer(_from, _to, _value);
  }

  /// @notice Send `_value` tokens to `_to` from your account
  /// @param _to The address of the recipient
  /// @param _value the amount to send
  function transfer(address _to, uint256 _value) {
      _transfer(msg.sender, _to, _value);
  }

  /// @notice Send `_value` tokens to `_to` in behalf of `_from`
  /// @param _from The address of the sender
  /// @param _to The address of the recipient
  /// @param _value the amount to send
  function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
      require (_value < allowance[_from][msg.sender]);     // Check allowance
      allowance[_from][msg.sender] -= _value;
      _transfer(_from, _to, _value);
      return true;
  }

  /// @notice Allows `_spender` to spend no more than `_value` tokens in your behalf
  /// @param _spender The address authorized to spend
  /// @param _value the max amount they can spend
  function approve(address _spender, uint256 _value)
      returns (bool success) {
      allowance[msg.sender][_spender] = _value;
      return true;
  }

  /// @notice Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it
  /// @param _spender The address authorized to spend
  /// @param _value the max amount they can spend
  /// @param _extraData some extra information to send to the approved contract
  function approveAndCall(address _spender, uint256 _value, bytes _extraData)
      returns (bool success) {
      tokenRecipient spender = tokenRecipient(_spender);
      if (approve(_spender, _value)) {
          spender.receiveApproval(msg.sender, _value, this, _extraData);
          return true;
      }
  }        

  /// @notice Remove `_value` tokens from the system irreversibly
  /// @param _value the amount of money to burn
  function burn(uint256 _value) returns (bool success) {
      require (balanceOf[msg.sender] > _value);            // Check if the sender has enough
      balanceOf[msg.sender] -= _value;                      // Subtract from the sender
      totalSupply -= _value;                                // Updates totalSupply
      Burn(msg.sender, _value);
      return true;
  }

  function burnFrom(address _from, uint256 _value) returns (bool success) {
      require(balanceOf[_from] >= _value);                // Check if the targeted balance is enough
      require(_value <= allowance[_from][msg.sender]);    // Check allowance
      balanceOf[_from] -= _value;                         // Subtract from the targeted balance
      allowance[_from][msg.sender] -= _value;             // Subtract from the sender's allowance
      totalSupply -= _value;                              // Update totalSupply
      Burn(_from, _value);
      return true;
  }

}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
      require (_value < allowance[_from][msg.sender]);     // Check allowance
      allowance[_from][msg.sender] -= _value;
      _transfer(_from, _to, _value);
      return true;
  }
/// @notice Send `_value` tokens to `_to` in behalf of `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value the amount to send