23 lines
509 B
Solidity
23 lines
509 B
Solidity
pragma solidity ^0.5.11;
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library Math {
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function min(uint256 a, uint256 b) internal pure returns (uint256) {
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return a < b ? a : b;
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}
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// based on https://github.com/ethereum/dapp-bin/pull/50/files#diff-2f78bfcc90b711a5c3bb69fd5b04f11aR28
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function sqrt(uint256 x) internal pure returns (uint256) {
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if (x == 0) return 0;
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else if (x <= 3) return 1;
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uint256 z = (x + 1) / 2;
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uint256 y = x;
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while (z < y) {
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y = z;
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z = (x / z + z) / 2;
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}
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return y;
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}
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}
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