Given an array nums and an integer target.
Return the maximum number of non-empty non-overlapping subarrays such that the sum of values in each subarray is equal to target.
 
Example 1:
Input: nums = [1,1,1,1,1], target = 2
Output: 2
Explanation: There are 2 non-overlapping subarrays [1,1,1,1,1] with sum equals to target(2).

Example 2:
Input: nums = [-1,3,5,1,4,2,-9], target = 6
Output: 2
Explanation: There are 3 subarrays with sum equal to 6.
([5,1], [4,2], [3,5,1,4,2,-9]) but only the first 2 are non-overlapping.
Example 3:
Input: nums = [-2,6,6,3,5,4,1,2,8], target = 10
Output: 3

Example 4:
Input: nums = [0,0,0], target = 0
Output: 3

 
Constraints:

1 <= nums.length <= 10^5
-10^4 <= nums[i] <= 10^4
0 <= target <= 10^6

```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 = "### good explanation in https://www.youtube.com/watch?v=EW521e8c8lk\n\n### video starts 10:40\n\nclass Solution:\n    def maxNonOverlapping(self, nums: List[int], target: int) -> int:\n\n        prefixsum = {}\n        prefixsum[0] = True\n        prev = 0\n        res = 0\n        for num in nums:\n            curr = prev + num\n            \n            if curr - target in prefixsum:\n                res += 1\n                prefixsum = {}\n                prefixsum[0] = True\n                prev = 0\n            \n            else:\n                prefixsum[curr] = True\n                prev = curr\n            \n        print(res)\n        return res\n        \n        \n        \n        \n\n\n\n'''\nIt seems that I have exact the same idea as the following post\nhttps://leetcode.com/problems/maximum-number-of-non-overlapping-subarrays-with-sum-equals-target/discuss/780882/Java-14-lines-Greedy-PrefixSum-with-line-by-line-explanation-easy-to-understand\n\nwhy does the following code now working???? \n\n\n### The following code does not pass submission ..... \nclass Solution:\n    def maxNonOverlapping(self, nums: List[int], target: int) -> int:\n        \n        prefixsum = {}\n        prefixsum[0] = -1\n        res = 0\n        last = -1\n        prev = 0\n        for idx, num in enumerate(nums):\n            curr = prev + num\n            prefixsum[curr] = idx\n            \n            if curr - target in prefixsum:\n                if prefixsum[curr - target] >= last:\n                    res += 1\n                    last = prefixsum[curr]\n            prev = curr \n        print(prefixsum)\n        print(res)\n        return res\n\n\n'''\n\n\n\n\n"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'maxNonOverlapping'
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: 5734