You are a skier (marked below by the `X`). You have made it to the Olympics! Well done.

```
\_\_\_X\_
\*\*\*\*\*\
\*\*\*\*\*\*\
\*\*\*\*\*\*\*\
\*\*\*\*\*\*\*\*\
\*\*\*\*\*\*\*\*\*\\.\_\_\_\_/
```

Your job in this kata is to calculate the maximum speed you will achieve during your downhill run. The speed is dictated by the height of the mountain. Each element of the array is a layer of the mountain as indicated by the diagram above (and further below). So for this example the mountain has a height of 5 (5 rows of stars). `Speed` is `mountain height * 1.5`.

The jump length is calculated by `(mountain height * speed * 9) / 10`. Jump length should be rounded to 2 decimal places.

You must return the length of the resulting jump as a string in the following format:

* when less than 10 m: `"X metres: He's crap!"`
* between 10 and 25 m: `"X metres: He's ok!"`
* between 25 and 50 m: `"X metres: He's flying!"`
* when more than 50 m: `"X metres: Gold!!"`

So in the example case above, the right answer would be `"33.75 metres: He's flying!"`

Sadly, it takes a lot of time to make arrays look like mountains, so the tests wont all look so nice. To give an example, the above mountain would look as follows in most cases:

```
[*****, ******, *******, ********, *********]
```
Not as much fun, eh?

*p.s. if you think "metre" is incorrect, please [read this](https://en.wikipedia.org/wiki/Metre#Spelling)*

```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 ski_jump(mountain):\n    height = len(mountain)\n    speed = height * 1.5\n    jump_length = height * speed * 9 / 10\n    return (\n        f"{jump_length:.2f} metres: He\'s crap!" if jump_length < 10  else\n        f"{jump_length:.2f} metres: He\'s ok!" if jump_length < 25 else\n        f"{jump_length:.2f} metres: He\'s flying!" if jump_length < 50 else\n        f"{jump_length:.2f} metres: Gold!!"\n    )'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'ski_jump'
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: 5552