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pragma solidity ^0.4.13;
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
0xA878b71BF6b8aBa7C57d5411D1d7D37d6d3526c0
0x36eFD4D412Be468d5213f8165495402d0640b50B
0x36eFD4D412Be468d5213f8165495402d0640b50B