georgir

// Input may exceed JS 53-bit int limits
// So we need a small UInt64 implementation
// Yeah I know it can be improved with some bitwise ops, whatever.
const UInt32Max = 2**32;
export class UInt64{
    constructor(hi, lo, rem) {
        if (lo !== undefined) {
            // Proper overflow/unsignedness of both 32bit components.
            if (+lo >= UInt32Max) {
                hi += Math.floor(lo / UInt32Max);