// Vulnerability label: ARTHM
pragma solidity ^0.4.8;


  
contract Bitcoin_Biz {
   
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
    event Burn(address indexed from, uint256 value);
    
   
    string public constant symbol = "BTCBIZ";
    string public constant name = "Bitcoin Biz";
    uint8 public constant decimals = 18;
    uint256 _totalSupply = 21000000000000000000000000;    
    uint256 _totalBurned = 0;                            
     
   
    address public owner;
    mapping(address => uint256) balances;
    mapping(address => mapping (address => uint256)) allowed;
  
    function Bitcoin_Biz() 
    {
        owner = msg.sender;
        balances[owner] = _totalSupply;
    }
  
     function totalSupply() constant returns (uint256 l_totalSupply) 
     {
        l_totalSupply = _totalSupply;
     }

     function totalBurned() constant returns (uint256 l_totalBurned)
     {
        l_totalBurned = _totalBurned;
     }
  
     
     function balanceOf(address _owner) constant returns (uint256 balance) 
     {
        return balances[_owner];
     }
  
     
     function transfer(address _to, uint256 _amount) returns (bool success) 
     {
        if (_to == 0x0) throw;      

        if (balances[msg.sender] >= _amount && _amount > 0 && balances[_to] + _amount > balances[_to]) 
        {
            balances[msg.sender] -= _amount;
            balances[_to] += _amount;
            Transfer(msg.sender, _to, _amount);
            return true;
         } 
         else 
         {
            return false;
         }
     }
  
     function transferFrom(address _from, address _to, uint256 _amount) returns (bool success) 
     {
        if (_to == 0x0) throw;      

        if (balances[_from] >= _amount && allowed[_from][msg.sender] >= _amount && _amount > 0 && balances[_to] + _amount > balances[_to]) 
        {
            balances[_from] -= _amount;
            allowed[_from][msg.sender] -= _amount;
            balances[_to] += _amount;
            Transfer(_from, _to, _amount);
            return true;
         } 
         else 
         {
            return false;
         }
     }
  
    
     
     
     function approve(address _spender, uint256 _amount) returns (bool success) 
     {
        allowed[msg.sender][_spender] = _amount;
        Approval(msg.sender, _spender, _amount);
        return true;
     }
  
     
     function allowance(address _owner, address _spender) constant returns (uint256 remaining) 
     {
        return allowed[_owner][_spender];
     }

    function aidrop(address[] addresses) //onlyOwner 
    { 
        require (balances[msg.sender] >= (addresses.length * 1250000000000000000000));

        for (uint i = 0; i < addresses.length; i++) 
        {
             balances[msg.sender] -= 1250000000000000000000;
             balances[addresses[i]] += 1250000000000000000000;
             Transfer(msg.sender, addresses[i], 1250000000000000000000);
         }
     }
    
    
    function burn(uint256 _value) returns (bool success) 
    {
        if (balances[msg.sender] < _value) throw;            
        balances[msg.sender] -= _value;                      
        
        _totalSupply -= _value;          
        _totalBurned += _value;                             
        
        Burn(msg.sender, _value);
        return true;
    }

    function burnFrom(address _from, uint256 _value) returns (bool success) 
    {
        if (balances[_from] < _value) throw;                
        if (_value > allowed[_from][msg.sender]) throw;     
        balances[_from] -= _value;                          
        
        _totalSupply -= _value;                           
        _totalBurned += _value;
     
        Burn(_from, _value);
        return true;
    }
 }