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 contract SafeMath    - function safeMul(uint256 a, uint256 b ...    - function safeDiv(uint256 a, uint256 b ...    - function safeSub(uint256 a, uint256 b ...    - function safeAdd(uint256 a, uint256 b ...    - function assert(bool assertion)  contract Tsoc is SafeMath *    - function transfer(address _to, uint25 ...    - function approve(address _spender, ui ...    - function transferFrom(address _from, ...    - function burn(uint256 _value)    - function withdrawEther(uint256 amount ...    - function()

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/**
 *Submitted for verification at Etherscan.io on 2018-09-06
*/

pragma solidity ^0.4.8;

/**
 * Math operations with safety checks
 */
contract SafeMath {
  function safeMul(uint256 a, uint256 b) internal returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function safeDiv(uint256 a, uint256 b) internal returns (uint256) {
    assert(b > 0);
    uint256 c = a / b;
    assert(a == b * c + a % b);
    return c;
  }

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

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

  function assert(bool assertion) internal {
    // if (!assertion) {
    //   throw;
    // }
    require(assertion);
  }
}
contract Tsoc is SafeMath{
    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;
	address public owner;

    /* 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 */
    constructor() public {
        totalSupply = 5*10**27 ;
        balanceOf[msg.sender] = totalSupply;              // Give the creator all initial tokens
        name = "Angle ore circle";                               // Set the name for display purposes
        symbol = "Tsoc" ;                             // Set the symbol for display purposes
        decimals = 18 ;                            // Amount of decimals for display purposes
		owner = msg.sender;
    }

    /* Send coins */
    function transfer(address _to, uint256 _value) public {
        require(_to != 0x0);                               // Prevent transfer to 0x0 address. Use burn() instead
		require(_value > 0) ; 
        require(balanceOf[msg.sender] >= _value);           // Check if the sender has enough
        require(balanceOf[_to] + _value >= balanceOf[_to]) ; // Check for overflows
        balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);                     // Subtract from the sender
        balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);                            // Add the same to the recipient
        emit Transfer(msg.sender, _to, _value);                   // Notify anyone listening that this transfer took place
    }

    /* Allow another contract to spend some tokens in your behalf */
    function approve(address _spender, uint256 _value) public returns (bool success) {
		require (_value > 0) ; 
        allowance[msg.sender][_spender] = _value;
        return true;
    }
       

    /* A contract attempts to get the coins */
    function transferFrom(address _from, address _to, uint256 _value)public returns (bool success) {
        require(_to!=0x0);                                // Prevent transfer to 0x0 address. Use burn() instead
		require(_value>0); 
        require(balanceOf[_from] >= _value);                 // Check if the sender has enough
        require(balanceOf[_to] + _value >= balanceOf[_to]);  // Check for overflows
        require(_value <= allowance[_from][msg.sender]) ;     // Check allowance
        balanceOf[_from] = SafeMath.safeSub(balanceOf[_from], _value);                           // Subtract from the sender
        balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);                             // Add the same to the recipient
        allowance[_from][msg.sender] = SafeMath.safeSub(allowance[_from][msg.sender], _value);
        emit Transfer(_from, _to, _value);
        return true;
    }

    function burn(uint256 _value) public returns (bool success) {
        require(balanceOf[msg.sender] >= _value);            // Check if the sender has enough
		require (_value > 0) ; 
        balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);                      // Subtract from the sender
        totalSupply = SafeMath.safeSub(totalSupply,_value);                                // Updates totalSupply
        emit Burn(msg.sender, _value);
        return true;
    }
	// transfer balance to owner
	function withdrawEther(uint256 amount) public {
		require(msg.sender == owner);
		owner.transfer(amount);
	}
	
	// can accept ether
    function() public payable
    {
    }
}

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