We have the integer `9457`. 

We distribute its digits in two buckets having the following possible distributions (we put the generated numbers as strings and we add the corresponding formed integers for each partition):
```
- one bucket with one digit and the other with three digits 
[['9'], ['4','5','7']] --> ['9','457'] --> 9 + 457 = 466
[['9','5','7'], ['4']] --> ['957','4'] --> 957 + 4 = 961
[['9','4','7'], ['5']] --> ['947','5'] --> 947 + 5 = 952
[['9','4','5'], ['7']] --> ['945','7'] --> 945 + 7 = 952

- two buckets with 2 digits each:
[['9','4'], ['5','7']] --> ['94','57'] --> 94 + 57 = 151
[['9','5'], ['4','7']] --> ['95','47'] --> 95 + 47 = 142
[['9','7'], ['4','5']] --> ['97','45'] --> 97 + 45 = 142
```

Now we distribute the digits of that integer in three buckets, and we do the same presentation as above:
```
one bucket of two digits and two buckets with one digit each:
[['9'], ['4'], ['5','7']] --> ['9','4','57'] --> 9 + 4 + 57 = 70
[['9','4'], ['5'], ['7']] --> ['94','5','7'] --> 94 + 5 + 7 = 106
[['9'], ['4', '5'], ['7']] --> ['9','45','7'] --> 9 + 45 + 7 = 61
[['9'], ['5'], ['4','7']] --> ['9','5','47'] --> 9 + 5 + 47 = 61
[['9','5'], ['4'], ['7']] --> ['95','4','7'] --> 95 + 4 + 7 = 106
[['9','7'], ['4'], ['5']] --> ['97','4','5'] --> 97 + 4 + 5 = 106
```
Finally we distribute the digits in the maximum possible amount of buckets for this integer, four buckets, with an unique distribution:
```
One digit in each bucket.
[['9'], ['4'], ['5'], ['7']] --> ['9','4','5','7'] --> 9 + 4 + 5 + 7 = 25
```
In the distribution we can observe the following aspects:

- the order of the buckets does not matter

- the order of the digits in each bucket matters; the available digits have the same order than in the original number.

- the amount of buckets varies from two up to the amount of digits

The function, `f =` `bucket_digit_distributions_total_sum`, gives for each integer, the result of the big sum of the total addition of generated numbers for each distribution of digits.
```python
bucket_digit_distributions_total_sum(9457) === 4301 # 466 + 961 + 952 + 952 + 151 + 142 + 142 + 70 + 106 + 61 + 61 + 106 + 106 + 25 = 4301
```
It is interesting to see the value of this function for a number that has one or more zeroes as digits, for example:
```python
bucket_digit_distributions_total_sum(10001) === 5466
```
Given an integer `n`, with its corresponding value of the above function, `f(n)`, and another integer `z`, find the closest and higher integer to n, `nf`, such `f(nf) > f(n) + z`.

Example:
```python
find(10001,100) === 10003
find(30000, 1000) === 30046
``` 
Features of the random tests:
```
100 <= n <= 1500000
50 <= z <= 6000
```

```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 = "# Partition generator taken from \n# https://stackoverflow.com/questions/19368375/set-partitions-in-python\ndef partition(collection):\n    if len(collection) == 1:\n        yield [ collection ]\n        return\n\n    first = collection[0]\n    for smaller in partition(collection[1:]):\n        # insert `first` in each of the subpartition's subsets\n        for n, subset in enumerate(smaller):\n            yield smaller[:n] + [[ first ] + subset]  + smaller[n+1:]\n        # put `first` in its own subset \n        yield [ [ first ] ] + smaller\n        \ndef part_sum(part_list):\n    tot_sum = 0\n    for elem in part_list:\n        tot_sum += sum(int(''.join(x)) for x in elem)\n    return tot_sum\n\ndef find(n,z):\n    min_sum = part_sum([x for x in partition(list(str(n)))][1:]) + z\n    i = 1\n    nf_sum = part_sum([x for x in partition(list(str(n+i)))][1:])\n    while nf_sum <= min_sum:\n        i += 1\n        nf_sum = part_sum([x for x in partition(list(str(n+i)))][1:])\n    return n+i"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'find'
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: 12670