19 lines
425 B
Solidity
19 lines
425 B
Solidity
pragma solidity 0.5.12;
|
|
|
|
library Math {
|
|
function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
|
|
return x <= y ? x : y;
|
|
}
|
|
|
|
function sqrt(uint256 x) internal pure returns (uint256 y) {
|
|
if (x == 0) return 0;
|
|
else if (x <= 3) return 1;
|
|
uint256 z = (x + 1) / 2;
|
|
y = x;
|
|
while (z < y) {
|
|
y = z;
|
|
z = (x / z + z) / 2;
|
|
}
|
|
}
|
|
}
|