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 = 'class Solution:\n    def maxNonOverlapping(self, nums: List[int], target: int) -> int:\n        # n = len(nums)\n        # hashmap = {0:0}\n        # ans = 0\n        # sums = 0\n        # for i in range(n):\n        #     sums += nums[i]\n        #     if sums-target in hashmap:\n        #         ans = max(ans, hashmap[sums-target] + 1)\n        #     hashmap[sums] = ans\n        # return ans\n        \n        \n        n = len(nums)\n        preSum = [0 for i in range(n+1)]\n        hashmap = {0:0}\n        lastend = 0\n        ans = 0\n        for i in range(1, n+1):\n            preSum[i] = preSum[i-1] + nums[i-1]\n            begin = hashmap.get(preSum[i]-target, -1)\n            if begin >= 0 and begin >= lastend:\n                lastend = i\n                ans += 1\n            hashmap[preSum[i]] = i\n        return ans\n        \n        # n = len(nums)\n        # dp = [0 for i in range(n+1)]\n        # for i in range(n):\n        #     tmpsum = 0\n        #     for j in range(i, -1, -1):\n        #         tmpsum += nums[j]\n        #         if tmpsum == target:\n        #             dp[i+1] = max(dp[i+1], dp[j] + 1)\n        #         else:\n        #             dp[i+1] = max(dp[i+1], dp[j])\n        # print(dp)\n        # return dp[n]\n        \n        \n        # n = len(nums)\n        # dp = [0 for i in range(n)]\n        # if target == nums[0]:\n        #     dp[0] = 1\n        # for i in range(1, n):\n        #     tmpsum = 0\n        #     for j in range(i, -1, -1):\n        #         tmpsum += nums[j]\n        #         if tmpsum == target:\n        #             if j > 0:\n        #                 dp[i] = max(dp[i], dp[j-1] + 1)\n        #             else:\n        #                 dp[i] = max(dp[i], 1)\n        #             break\n        # print(dp)\n        # return dp[n-1]\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: 5708