## Problem

There are `n` apples that need to be divided into four piles. We need two mysterious number `x` and `y`. Let The number of first pile equals to `x+y`, the number of second pile equals to `x-y`, the number of third pile equals to `x*y`, the number of fourth pile equals to `x/y`. We need to calculate how many apples are there in each pile.

Of course, there won't be so many unknowns. We know the total number of apples(`n`) and the second mysterious number(`y`). 

For example: there are 48 apples need to divided into four piles. y=3. that is, 1st pile should be x+3, 2nd pile should be x-3, 3rd pile should be x*3, 4th pile should be x/3.
Do you know how much `x` is? `x` should be 9, because:
```
(9 + 3) + (9 - 3) + (9 * 3) + (9 / 3) = 12 + 6 + 27 + 3 = 48
```
So, 48 apples should be divided into `12, 6, 27, 3`.

## Task

Complete function `fourPiles()`/`four_piles()` that accepts two arguments `n` and `y`, return an array contains the number of for piles. Each element in the result array should be a positive integer. If can not divide, please return `[]`.

## Examples

```
fourPiles 48 3 -- [12,6,27,3]  
//The elements are arranged in sequence according to:
//   x+y,x-y,x*y,x/y

fourPiles 100 4 -- [20,12,64,4]  
-- Verify correctness:
-- x=16,y=4
(16+4) + (16-4) + (16*4) + (16/4) -- 100

-- Edge case:
fourPiles 25 4  -- []  -- [8,0,16,1] is not a correct answer

fourPiles 24 4  -- []  -- can not divide
```

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

def _disabled_input(*args, **kwargs):
    raise RuntimeError("input() is disabled in callable mode")
builtins.input = _disabled_input

ns = {"__name__": "__judge__"}  # prevent if __name__ == "__main__" blocks
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = 'def four_piles(n,y):       \n    x = y * n / (y**2 + 2*y + 1)\n    return [x + y, x - y, x * y, x / y] if int(x) == x and x - y > 0 else []'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'four_piles'
if _fn_name:
    if "Solution" in ns:
        try:
            _obj = ns["Solution"]()
            if hasattr(_obj, _fn_name):
                _target = getattr(_obj, _fn_name)
        except Exception:
            _target = None
    if _target is None and _fn_name in ns and callable(ns[_fn_name]):
        _target = ns[_fn_name]
# Fallback: if there's exactly one user-defined function, use it
if _target is None:
    _cands = [v for k, v in ns.items() if callable(v) and getattr(v, "__module__", "") in ("__judge__", "__main__")]
    _user_funcs = [c for c in _cands if getattr(c, "__name__", "").startswith("_") is False]
    if len(_user_funcs) == 1:
        _target = _user_funcs[0]
if _target is None:
    raise RuntimeError(f"Could not resolve callable '{_fn_name}'")

_raw = sys.stdin.read().strip()
if _raw:
    _parsed = json.loads(_raw)
    if isinstance(_parsed, dict):
        _kwargs = _parsed.get("kwargs", {})
        _args = _parsed.get("args", [])
    else:
        _args, _kwargs = _parsed, {}
else:
    _args, _kwargs = [], {}
if not isinstance(_args, (list, tuple)):
    _args = [_args]
_res = _target(*_args, **_kwargs)
try:
    sys.stdout.write(repr(_res) + "\n")
except Exception:
    pass

```

Measured memory_bytes: 5606