Given an array of positive integers, replace every element with the least greater element to its right.
 If there is no greater element to its right, replace it with -1. For instance, given the array 
 
 `[8, 58, 71, 18, 31, 32, 63, 92, 43, 3, 91, 93, 25, 80, 28]`,
 
 the desired output is 
 
 `[18, 63, 80, 25, 32, 43, 80, 93, 80, 25, 93, -1, 28, -1, -1]`.

Your task is to create a function "arrayManip()" that takes in an array as its argument, manipulates the array as described above, then return the resulting array.

Note: Return a new array, rather than modifying the passed array.

```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 = 'class BinaryTree:\n    def __init__(self, value, left=None, right=None, parent=None):\n        self.value = value\n        self.left = left\n        self.right = right\n        self.parent = parent\n        \n    def __str__(self):\n        if self.left or self.right:\n            s = "(" + str(self.value)\n            sl = self.left or \'#\'\n            sr = self.right or \'#\'\n            for l in str(sl).split("\\n"):\n                s += "\\n  " + l\n            for l in str(sr).split("\\n"):\n                s += "\\n  " + l\n            return s + ")"\n        else:\n            return f"{self.value}"\n\n    def add(self, val):\n        if val < self.value:\n            if self.left:\n                return self.left.add(val)\n            else:\n                self.left = BinaryTree(val, parent=self)\n                return self.left\n        elif val > self.value:\n            if self.right:\n                return self.right.add(val)\n            else:\n                self.right = BinaryTree(val, parent=self)\n                return self.right\n        elif val == self.value:\n            return self\n    \n    def leftmost(self):\n        x = self\n        while x.left:\n            x = x.left\n        return x\n\n    def nxt(self):\n        if self.right:\n            return self.right.leftmost().value\n        else:\n            x = self.parent\n            while x and x.value < self.value:\n                x = x.parent\n            if x:\n                return x.value\n            \n        return -1\n\ndef array_manip(array):\n    if not array:\n        return []\n    \n    result = []\n    b = BinaryTree(array[-1])\n    \n    for item in reversed(array):\n        result.append(b.add(item).nxt())\n        \n    return result[::-1]\n    \n'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'array_manip'
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: 10842