mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
24 lines
549 B
Solidity
24 lines
549 B
Solidity
contract collatz {
|
|
function run(uint x) public returns(uint y) {
|
|
while ((y = x) > 1) {
|
|
if (x % 2 == 0) x = evenStep(x);
|
|
else x = oddStep(x);
|
|
}
|
|
}
|
|
function evenStep(uint x) public returns(uint y) {
|
|
return x / 2;
|
|
}
|
|
function oddStep(uint x) public returns(uint y) {
|
|
return 3 * x + 1;
|
|
}
|
|
}
|
|
// ====
|
|
// compileViaYul: also
|
|
// compileToEwasm: also
|
|
// ----
|
|
// run(uint256): 0 -> 0
|
|
// run(uint256): 1 -> 1
|
|
// run(uint256): 2 -> 1
|
|
// run(uint256): 8 -> 1
|
|
// run(uint256): 127 -> 1
|