Write a function ```convert_temp(temp, from_scale, to_scale)``` converting temperature from one scale to another. 
Return converted temp value. 

Round converted temp value to an integer(!).

Reading: http://en.wikipedia.org/wiki/Conversion_of_units_of_temperature

```
possible scale inputs:
    "C"  for Celsius
    "F"  for Fahrenheit
    "K"  for Kelvin
    "R"  for Rankine
    "De" for Delisle
    "N"  for Newton
    "Re" for Réaumur
    "Ro" for Rømer
```

```temp``` is a number, ```from_scale``` and ```to_scale``` are strings. 

```python
convert_temp(   100, "C",  "F") # => 212
convert_temp(    40, "Re", "C") # => 50
convert_temp(    60, "De", "F") # => 140
convert_temp(373.15, "K",  "N") # => 33
convert_temp(   666, "K",  "K") # => 666
```

```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 = "\nint2 = lambda x: int(round(x, 0))\n\ndef other2c(temp, from_scale):\n    func_dict = {\n        'C': lambda x: x,\n        'K': lambda x: int2(x - 273.15),\n        'F': lambda x: int2((x - 32) * 5 / 9),\n        'R': lambda x: int2((x - 491.67) * 5 / 9),\n        'De': lambda x: int2(100 - x * 2 / 3),\n        'N': lambda x: int2(x * 100 / 33),\n        'Re': lambda x: int2(x * 5 / 4),\n        'Ro': lambda x: int2((x - 7.5) * 40 / 21)\n    }\n    return func_dict[from_scale](temp)\n\n\ndef c2other(temp, to_scale):\n    func_dict = {\n        'C': lambda x: x,\n        'K': lambda x: int2(x + 273.15),\n        'F': lambda x: int2(x * 9 / 5 + 32),\n        'R': lambda x: int2((x + 273.15) * 9 / 5),\n        'De': lambda x: int2((100 - x) * 3 / 2),\n        'N': lambda x: int2(x * 33 / 100),\n        'Re': lambda x: int2(x * 4 / 5),\n        'Ro': lambda x: int2(x * 21 / 40 + 7.5)\n    }\n    return func_dict[to_scale](temp)\n\n\ndef convert_temp(temp, from_scale, to_scale):\n    if from_scale == to_scale:\n        return temp\n    nowc = other2c(temp, from_scale)\n    c2res = c2other(nowc, to_scale)\n    return c2res"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'convert_temp'
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: 7258