## 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 = "def check_dates(records):\n    correct = 0; recoverable = 0; uncertain = 0\n    for rec in records:\n        rec = DateRange(*rec)\n        if rec.correct: correct += 1\n        elif rec.recoverable: recoverable += 1\n        elif rec.uncertain: uncertain += 1\n    return [correct,recoverable,uncertain]\n\nclass Date:\n    def __init__(self,date):\n        self.date = [int(n) for n in date.split('-')]\n        if 12<self.date[1]: self.date[2], self.date[1] = self.date[1:]; self.corrected = True\n        else: self.corrected = False\n        self.ambiguous = self.date[1]<13 and self.date[2]<13 and self.date[1]!=self.date[2]\n    def swap(self):\n        date = self.date[:]; date[2], date[1] = date[1:]\n        return Date('-'.join([str(d) for d in date]))\n    def __le__(self,other):\n        if self.date[0]!=other.date[0]: return self.date[0]<other.date[0]\n        if self.date[1]!=other.date[1]: return self.date[1]<other.date[1]\n        return self.date[2]<=other.date[2]\n\nclass DateRange:\n    def __init__(self,start,end):\n        self.start = Date(start); self.end = Date(end)\n        self.correct = None; self.recoverable = None; self.uncertain = None\n        self.ambiguous = self.start.ambiguous or self.end.ambiguous\n        if not self.ambiguous and self.start<=self.end:\n            if self.start.corrected or self.end.corrected: self.recoverable = True\n            else: self.correct = True\n        else:\n            self.start = [self.start]; self.end = [self.end]\n            if self.start[0].ambiguous: self.start.append(self.start[0].swap())\n            if self.end[0].ambiguous: self.end.append(self.end[0].swap())\n            self.ranges = [(self.start[0],self.end[0])]\n            if self.end[0].ambiguous: self.ranges.append((self.start[0],self.end[1]))\n            if self.start[0].ambiguous:\n                self.ranges.append((self.start[1],self.end[0]))\n                if self.end[0].ambiguous: self.ranges.append((self.start[1],self.end[1]))\n            self.ranges = [r for r in self.ranges if r[0]<=r[1]]\n            if len(self.ranges)==1:\n                if self.start[0]==self.ranges[0][0] and self.end[0]==self.ranges[0][1]: self.correct = True\n                else: self.recoverable = True\n            else: self.uncertain = True\n"
_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: 5468