Given an array A of positive integers, A[i] represents the value of the i-th sightseeing spot, and two sightseeing spots i and j have distance j - i between them.
The score of a pair (i < j) of sightseeing spots is (A[i] + A[j] + i - j) : the sum of the values of the sightseeing spots, minus the distance between them.
Return the maximum score of a pair of sightseeing spots.
 
Example 1:
Input: [8,1,5,2,6]
Output: 11
Explanation: i = 0, j = 2, A[i] + A[j] + i - j = 8 + 5 + 0 - 2 = 11

 
Note:

2 <= A.length <= 50000
1 <= A[i] <= 1000

```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 = "#\n# @lc app=leetcode id=1014 lang=python3\n#\n# [1014] Best Sightseeing Pair\n#\n# https://leetcode.com/problems/best-sightseeing-pair/description/\n#\n# algorithms\n# Medium (50.18%)\n# Likes:    266\n# Dislikes: 15\n# Total Accepted:    10.6K\n# Total Submissions: 21K\n# Testcase Example:  '[8,1,5,2,6]'\n#\n# Given an array A of positive integers, A[i] represents the value of the i-th\n# sightseeing spot, and two\xa0sightseeing spots i and j\xa0have distance j - i\n# between them.\n# \n# The score\xa0of a pair (i < j) of sightseeing spots is (A[i] + A[j] + i\xa0- j) :\n# the sum of the values of the sightseeing spots, minus the distance between\n# them.\n# \n# Return the maximum score of a pair of sightseeing spots.\n# \n# \n# \n# Example 1:\n# \n# \n# Input: [8,1,5,2,6]\n# Output: 11\n# Explanation: i = 0, j = 2, A[i] + A[j] + i - j = 8 + 5 + 0 - 2 = 11\n# \n# \n# \n# \n# Note:\n# \n# \n# 2 <= A.length <= 50000\n# 1 <= A[i] <= 1000\n# \n#\nclass Solution:\n    def maxScoreSightseeingPair(self, A: List[int]) -> int:\n        # Count the current best score in all previous sightseeing spot.\n        # Note that, as we go further, the score of previous spot decrement.\n        cur = res = 0\n        for a in A:\n            res = max(res, cur + a)\n            cur = max(cur, a) - 1\n        return res\n        \n\n"
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

_target = None
_fn_name = 'maxScoreSightseeingPair'
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: 5360