Two tortoises named ***A*** and ***B*** must run a race. ***A*** starts with an average speed of ```720 feet per hour```.
Young ***B*** knows she runs faster than ***A***, and furthermore has not finished her cabbage.

When she starts, at last, she can see that ***A*** has a `70 feet lead` but ***B***'s speed is `850 feet per hour`.
How long will it take ***B*** to catch ***A***?

More generally:
given two speeds `v1` (***A***'s speed, integer > 0) and `v2` (***B***'s speed, integer > 0) and a lead `g` (integer > 0)
how long will it take ***B*** to catch ***A***? 

The result will be an array ```[hour, min, sec]``` which is the time needed in hours, minutes and seconds (round down to the nearest second)
or a string in some languages.

If `v1 >= v2` then return `nil`, `nothing`, `null`, `None` or `{-1, -1, -1}` for C++, C, Go, Nim, `[]` for Kotlin or "-1 -1 -1".

## Examples:
(form of the result depends on the language)
```
race(720, 850, 70) => [0, 32, 18] or "0 32 18"
race(80, 91, 37)   => [3, 21, 49] or "3 21 49"
```

** Note: 

- See other examples in "Your test cases".

- In Fortran - as in any other language - the returned string is not permitted to contain any redundant trailing whitespace: you can use dynamically allocated character strings.

** Hints for people who don't know how to convert to hours, minutes, seconds:

- Tortoises don't care about fractions of seconds

- Think of calculation by hand using only integers (in your code use or simulate integer division)

- or Google: "convert decimal time to hours minutes seconds"

```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 race(v1, v2, g):\n    if v1>=v2:\n        return None\n    t = g / (v2 - v1) * 60 * 60\n    return [int(t // 3600), \n            int((t // 60) % 60), \n            int(t % 60)]'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'race'
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: 5634