pragma solidity ^0.4.24;




library SafeMath {

  
  function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
    
    
    
    if (a == 0) {
      return 0;
    }

    c = a * b;
    assert(c / a == b);
    return c;
  }

  
  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    
    
    
    return a / b;
  }

  
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  
  function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
    c = a + b;
    assert(c >= a);
    return c;
  }
}




contract Ownable {
  address public owner;

  event OwnershipTransferred(
    address indexed previousOwner,
    address indexed newOwner
  );


  
  constructor() public {
    owner = msg.sender;
  }

  
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  
  function transferOwnership(address _newOwner) public onlyOwner {
    _transferOwnership(_newOwner);
  }

  
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}




contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}




contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  uint256 totalSupply_;

  
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit Transfer(msg.sender, _to, _value);
    return true;
  }

  
  function balanceOf(address _owner) public view returns (uint256) {
    return balances[_owner];
  }

}




contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender)
    public view returns (uint256);

  function transferFrom(address from, address to, uint256 value)
    public returns (bool);

  function approve(address spender, uint256 value) public returns (bool);
  event Approval(
    address indexed owner,
    address indexed spender,
    uint256 value
  );
}




contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  
  function transferFrom(
    address _from,
    address _to,
    uint256 _value
  )
    public
    returns (bool)
  {
    require(_to != address(0));
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    emit Transfer(_from, _to, _value);
    return true;
  }

  
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    emit Approval(msg.sender, _spender, _value);
    return true;
  }

  
  function allowance(
    address _owner,
    address _spender
   )
    public
    view
    returns (uint256)
  {
    return allowed[_owner][_spender];
  }

  
  function increaseApproval(
    address _spender,
    uint256 _addedValue
  )
    public
    returns (bool)
  {
    allowed[msg.sender][_spender] = (
      allowed[msg.sender][_spender].add(_addedValue));
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  
  function decreaseApproval(
    address _spender,
    uint256 _subtractedValue
  )
    public
    returns (bool)
  {
    uint256 oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue >= oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}




contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  
  modifier whenPaused() {
    require(paused);
    _;
  }

  
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    emit Pause();
  }

  
  function unpause() onlyOwner whenPaused public {
    paused = false;
    emit Unpause();
  }
}




contract PausableToken is StandardToken, Pausable {

  function transfer(
    address _to,
    uint256 _value
  )
    public
    whenNotPaused
    returns (bool)
  {
    return super.transfer(_to, _value);
  }

  function transferFrom(
    address _from,
    address _to,
    uint256 _value
  )
    public
    whenNotPaused
    returns (bool)
  {
    return super.transferFrom(_from, _to, _value);
  }

  function approve(
    address _spender,
    uint256 _value
  )
    public
    whenNotPaused
    returns (bool)
  {
    return super.approve(_spender, _value);
  }

  function increaseApproval(
    address _spender,
    uint _addedValue
  )
    public
    whenNotPaused
    returns (bool success)
  {
    return super.increaseApproval(_spender, _addedValue);
  }

  function decreaseApproval(
    address _spender,
    uint _subtractedValue
  )
    public
    whenNotPaused
    returns (bool success)
  {
    return super.decreaseApproval(_spender, _subtractedValue);
  }
}





contract YouXiBi is PausableToken
{
  using SafeMath for uint256;
  
  
  string public name="YouXiBi";
  string public symbol="YXB";
  string public standard="ERC20";
  
  uint8 public constant decimals = 18; 
  
  uint256 public constant INITIAL_SUPPLY = 10 *(10**8)*(10 ** uint256(decimals));
  
  event NewLock(address indexed target,uint256 indexed locktime,uint256 lockamount);
  event UnLock(address indexed target,uint256 indexed unlocktime,uint256 unlockamount);
    
  mapping(address => TimeLock[]) public allocations;
  
  struct TimeLock
  {
      uint256 releaseTime;
      uint256 balance;
  }

  
  constructor() public 
  {
    totalSupply_ = INITIAL_SUPPLY;
    balances[msg.sender] = INITIAL_SUPPLY;
    emit Transfer(address(0), msg.sender, INITIAL_SUPPLY);
  }

  function transfer(address _to, uint256 _value) public returns (bool) 
  {
      require(canSubAllocation(msg.sender, _value));
    
      subAllocation(msg.sender);
    
      return super.transfer(_to, _value); 
  }

  function transferFrom(address _from, address _to,uint256 _value) public returns (bool)
  {
      require(canSubAllocation(_from, _value));

      subAllocation(_from);

      return super.transferFrom(_from,_to, _value); 
  }

  function canSubAllocation(address sender, uint256 sub_value) constant private returns (bool)
  {
      if (sub_value==0)
      {
          return false;
      }
      
      if (balances[sender] < sub_value)
      {
          return false;
      }

      if (allocations[sender].length == 0)
      {
          return true;
      }
      
      uint256 alllock_sum = 0;
      for (uint j=0; j<allocations[sender].length; j++)
      {
          if (allocations[sender][j].releaseTime >= block.timestamp)
          {
              alllock_sum = alllock_sum.add(allocations[sender][j].balance);
          }
      }
      
      uint256 can_unlock = balances[sender].sub(alllock_sum);
      
      return can_unlock >= sub_value;
  }

  function subAllocation(address sender) private
  {
      uint256 total_lockamount = 0;
      uint256 total_unlockamount = 0;
      for (uint j=0; j<allocations[sender].length; j++)
      {
          if (allocations[sender][j].releaseTime < block.timestamp)
          {
              total_unlockamount = total_unlockamount.add(allocations[sender][j].balance);
              allocations[sender][j].balance = 0;
          }
          else
          {
              total_lockamount = total_lockamount.add(allocations[sender][j].balance);
          }
      }

      if (total_unlockamount > 0)
      {
        emit UnLock(sender, block.timestamp, total_unlockamount);
      }
      
      if(total_lockamount == 0 && allocations[sender].length > 0)
      {
          delete allocations[sender];
      }
  }

  function setAllocation(address _address, uint256 total_value, uint[] times, uint256[] balanceRequires) public onlyOwner returns (bool)
  {
      require(times.length == balanceRequires.length);
      require(balances[msg.sender]>=total_value);   
      uint256 sum = 0;
      for (uint x=0; x<balanceRequires.length; x++)
      {
          require(balanceRequires[x]>0);
          sum = sum.add(balanceRequires[x]);
      }
      
      require(total_value >= sum);

      for (uint i=0; i<times.length; i++)
      {
          bool find = false;
          
          for (uint j=0; j<allocations[_address].length; j++)
          {
              if (allocations[_address][j].releaseTime == times[i])
              {
                  allocations[_address][j].balance = allocations[_address][j].balance.add(balanceRequires[i]);
                  find = true;
                  break;
              }
          }
          
          if (!find)
          {
              allocations[_address].push(TimeLock(times[i], balanceRequires[i]));
          }
      }

      emit NewLock(_address, block.timestamp, sum);
      
      return super.transfer(_address, total_value); 
  }
}