In this kata, you should calculate type of triangle with three given sides ``a``, ``b`` and ``c`` (given in any order).

If all angles are less than ``90°``, this triangle is ``acute`` and function should return ``1``.

If one angle is strictly ``90°``, this triangle is ``right`` and function should return ``2``.

If one angle more than ``90°``, this triangle is ``obtuse`` and function should return ``3``.

If three sides cannot form triangle, or one angle is ``180°`` (which turns triangle into segment) - function should return ``0``.

Input parameters are ``sides`` of given triangle. All input values are non-negative floating point or integer numbers (or both).




Acute


Right


Obtuse




### Examples:
```python
triangle_type(2, 4, 6) # return 0 (Not triangle)
triangle_type(8, 5, 7) # return 1 (Acute, angles are approx. 82°, 38° and 60°)
triangle_type(3, 4, 5) # return 2 (Right, angles are approx. 37°, 53° and exactly 90°)
triangle_type(7, 12, 8) # return 3 (Obtuse, angles are approx. 34°, 106° and 40°)
```

If you stuck, this can help you: http://en.wikipedia.org/wiki/Law_of_cosines. But you can solve this kata even without angle calculation.

There is very small chance of random test to fail due to round-off error, in such case resubmit your solution.

```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 triangle_type(a, b, c):\n  x, y, z = sorted([a, b, c])\n  diff = z*z - y*y - x*x\n  if z >= x+y: return 0\n  elif not diff: return 2\n  return 1 if diff < 0 else 3'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'triangle_type'
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: 5510