We have a sandglass consisting of two bulbs, bulb A and bulb B. These bulbs contain some amount of sand.
When we put the sandglass, either bulb A or B lies on top of the other and becomes the upper bulb. The other bulb becomes the lower bulb.
The sand drops from the upper bulb to the lower bulb at a rate of 1 gram per second.
When the upper bulb no longer contains any sand, nothing happens.
Initially at time 0, bulb A is the upper bulb and contains a grams of sand; bulb B contains X-a grams of sand (for a total of X grams).
We will turn over the sandglass at time r_1,r_2,..,r_K. Assume that this is an instantaneous action and takes no time. Here, time t refer to the time t seconds after time 0.
You are given Q queries.
Each query is in the form of (t_i,a_i).
For each query, assume that a=a_i and find the amount of sand that would be contained in bulb A at time t_i.

-----Constraints-----
 - 1≤X≤10^9
 - 1≤K≤10^5
 - 1≤r_1<r_2< .. <r_K≤10^9
 - 1≤Q≤10^5
 - 0≤t_1<t_2< .. <t_Q≤10^9
 - 0≤a_i≤X (1≤i≤Q)
 - All input values are integers.

-----Input-----
The input is given from Standard Input in the following format:
X
K
r_1 r_2 .. r_K
Q
t_1 a_1
t_2 a_2
:
t_Q a_Q

-----Output-----
For each query, print the answer in its own line.

-----Sample Input-----
180
3
60 120 180
3
30 90
61 1
180 180

-----Sample Output-----
60
1
120

In the first query, 30 out of the initial 90 grams of sand will drop from bulb A, resulting in 60 grams.
In the second query, the initial 1 gram of sand will drop from bulb A, and nothing will happen for the next 59 seconds. Then, we will turn over the sandglass, and 1 second after this, bulb A contains 1 gram of sand at the time in question.

```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

ns = {"__name__": "__main__"}
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = '# F\n# input\nfrom bisect import bisect\nX = int(input())\nK = int(input())\nr_list = [0] + list(map(int, input().split()))\n\nQ = int(input())\nquery_list = [list(map(int, input().split())) for _ in range(Q)]\n\n\nMmRL_list = []\n\n# M:max, m:min, R:min_a(M), L:max_a(m)\nM = X\nm = 0\nR = X\nL = 0\n\nMmRL_list.append([M, m, R, L])\n\nfor i in range(K):\n    M_ = M\n    m_ = m\n    R_ = R\n    L_ = L\n    lag = r_list[i+1] - r_list[i]\n    # update\n    if i % 2 == 0:\n        if M_ - lag < 0:\n            M = 0\n            R = 0\n        else:\n            M = M_ - lag\n            R = R_\n        if m_ - lag < 0:\n            m = 0\n            L = L_ + lag - m_\n        else:\n            m = m_ - lag\n            L = L_\n    else:\n        if M_ + lag > X:\n            M = X\n            R = R_ - (M_ + lag - X)\n        else:\n            M = M_ + lag\n            R = R_\n        if m_ + lag > X:\n            m = X\n            L = X\n        else:\n            m = m_ + lag\n            L = L_\n    MmRL_list.append([M, m, R, L])\n        \n\n# print(MmRL_list)\nfor q in range(Q):\n    t, a = query_list[q]\n    j = bisect(r_list, t) - 1\n    # find status then\n    M, m, R, L = MmRL_list[j]\n    if a <= L:\n        a_ = m\n    elif a >= R:\n        a_ = M\n    else:\n        a_ = m + (a - L)\n    t_ = t - r_list[j]\n    if j % 2 == 0:\n        res = max(a_ - t_, 0)\n    else:\n        res = min(a_ + t_, X)\n    print(res)\n'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 13713