A Pen by Steve Gardner on CodePen.
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pragma solidity ^0.4.11; | |
/** | |
* Math operations with safety checks | |
*/ | |
library SafeMath { | |
function mul(uint a, uint b) internal returns (uint) { | |
uint c = a * b; | |
assert(a == 0 || c / a == b); | |
return c; |
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class Node { | |
constructor (value) { | |
this.value = value | |
this.right = null | |
this.left = null | |
} | |
} | |
class Tree { | |
constructor () { |