spacetravelernaive.js

const spaceTraveler = (x, y, z) => {
  if (x === 0 || y === 0 || z === 0) return 0;
  if (x === 1 && y === 1 && z === 1) return 1;
  return spaceTraveler(x - 1, y, z) + spaceTraveler(x, y - 1, z) + spaceTraveler(x, y, z - 1);
};
console.log(gridTraveler(4, 4, 4));
// you are traveling in space
// you are at (0, 0, 0)
// find how many ways you can get to (x, y, z) by only increasing to them
// x,y,z > 0, are integers
// naive solution