## Story

Your company migrated the last 20 years of it's *very important data* to a new platform, in multiple phases. However, something went wrong: some of the essential time-stamps were messed up! It looks like that some servers were set to use the `dd/mm/yyyy` date format, while others were using the `mm/dd/yyyy` format during the migration. Unfortunately, the original database got corrupted in the process and there are no backups available... Now it's up to you to assess the damage.

## Task

You will receive a list of records as strings in the form of `[start_date, end_date]` given in the ISO `yyyy-mm-dd` format, and your task is to count how many of these records are: 
* **correct**: there can be nothing wrong with the dates, the month/day cannot be mixed up, or it would not make a valid timestamp in any other way; e.g. `["2015-04-04", "2015-05-13"]`
* **recoverable**: invalid in its current form, but the original timestamp can be recovered, because there is only one valid combination possible; e.g. `["2011-10-08", "2011-08-14"]`
* **uncertain**: one or both dates are ambiguous, and they may generate multiple valid timestamps, so the original cannot be retrieved; e.g. `["2002-02-07", "2002-12-10"]`

**Note:** the original records always defined a *non-negative* duration

Return your findings in an array: `[ correct_count, recoverable_count, uncertain_count ]`

## Examples

---

## My other katas

If you enjoyed this kata then please try [my other katas](https://www.codewars.com/collections/katas-created-by-anter69)! :-)

```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 = 'from datetime import date\nfrom itertools import product\n\n\ndef check_dates(records):    \n    correct, recoverable, uncertain = 0, 0, 0\n    parse = lambda s: date( *[int(d) for d in s.split("-")] )\n    \n    for date_pair in records:\n        start_date, end_date = map(parse, date_pair)\n        orig_duration_valid = (end_date - start_date).days >= 0\n        \n        poss_start_dates = set( [start_date] + ([date(start_date.year, start_date.day, start_date.month)] if start_date.day <= 12 else []) )\n        poss_end_dates   = set( [ end_date ] + ([date(end_date.year,   end_date.day,   end_date.month)  ] if end_date.day   <= 12 else []) )\n        \n        only_one_possible = sum( (poss_end - poss_start).days >= 0 for poss_start, poss_end in product(poss_start_dates, poss_end_dates) ) == 1\n        \n        if orig_duration_valid and only_one_possible:\n            correct += 1\n        elif only_one_possible:\n            recoverable += 1\n        else:\n            uncertain += 1\n    \n    return [ correct, recoverable, uncertain ]'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'check_dates'
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: 5830