const N = 1 / 3;
const CUBE_ROOTS = [];
for (let i = 0; i <= 255; i++) {
CUBE_ROOTS[i] = Math.pow(i, N);
}
let sum = 0;
const r = (Math.random() * 256) | 0;
sum += Math.pow(r, N);
const r = (Math.random() * 256) | 0;
sum += CUBE_ROOTS[r];
console.log(sum);