Problem:


Score : 300 points

Problem Statement

Given are an integer X and an integer sequence of length N: p_1, \ldots, p_N.

Among the integers not contained in the sequence p_1, \ldots, p_N (not necessarily positive), find the integer nearest to X, that is, find the integer whose absolute difference with X is the minimum. If there are multiple such integers, report the smallest such integer.

Constraints

1 \leq X \leq 100

0 \leq N \leq 100

1 \leq p_i \leq 100

p_1, \ldots, p_N are all distinct.

All values in input are integers.

Input

Input is given from Standard Input in the following format:

X N
p_1 ... p_N

Output

Print the answer.

Sample Input 1

6 5
4 7 10 6 5

Sample Output 1

8

Among the integers not contained in the sequence 4, 7, 10, 6, 5, the one nearest to 6 is 8.

Sample Input 2

10 5
4 7 10 6 5

Sample Output 2

9

Among the integers not contained in the sequence 4, 7, 10, 6, 5, the ones nearest to 10 are 9 and 11. We should print the smaller one, 9.

Sample Input 3

100 0

Sample Output 3

100

When N = 0, the second line in the input will be empty. Also, as seen here, X itself can be the answer.



Sample input:
6 5
4 7 10 6 5


Sample output:
8

Submission status: Runtime Error

Solution code:
x,n = map(int,input().split())
if n > 0 :
  p = list( map(int,input().split()) )

p = set(p)
if x not in p:
  ans = x
else:
  i = x - 1
  j = x + 1
  while 1:
    if i not in p and j not in p:
      ans = min(i,j)
      break

    if i not in p:
      ans = i
      break
    elif j not in p:
      ans = j
      break

    i -= 1
    j += 1

print(ans)

Submission status: Runtime Error

Solution code:
x,n = map(int,input().split())
if n:
    p = set(map(int,input().split()))
mini = float('inf')
ans = float('inf')
for i in range(1,102):
    if i not in p:
        if abs(x-i)<mini:
            mini = abs(x-i)
            ans = i
        elif abs(x-i)==mini and ans>i:
            ans=i
print(ans)

Submission status: Runtime Error

Solution code:
x,n = map(int,input().split())
a = list(map(int,input().split()))
ans = min(a)-1
for i in range(1,102):
    if i in a:
        continue
    if abs(x-i) < abs(x-ans):
        ans = i
print(ans)

Submission status: Runtime Error

Solution code:
def main(sample_file = ''):

    """ convenient functions
    # for i, a in enumerate(iterable)
    # q, mod = divmod(a, b)
    # divmod(x, y) returns the tuple (x//y, x%y)
    # Higher-order function: reduce(operator.mul, xyz_count, 1)
    # manage median(s) using two heapq https://atcoder.jp/contests/abc127/tasks/abc127_f
    """

    """convenient decorator
    # @functools.lru_cache():
    # to facilitate use of recursive function
        # ex:
        # from functools import lru_cache
        # import sys
        # sys.setrecursionlimit(10**9)
        # @lru_cache(maxsize=None)
        # def fib(n):
        #     if n < 2:
        #         return n
        #     return fib(n-1) + fib(n-2)
        # print(fib(1000))
    """
    
    # import numpy as np
    import sys
    sys.setrecursionlimit(10**7)
    from itertools import accumulate, combinations, permutations, product # https://docs.python.org/ja/3/library/itertools.html
    # accumulate() returns iterator! to get list: list(accumulate())
    from math import factorial, ceil, floor, sqrt
    def factorize(n):
        """return the factors of the Arg and count of each factor
        
        Args:
            n (long): number to be resolved into factors
        
        Returns:
            list of tuples: factorize(220) returns [(2, 2), (5, 1), (11, 1)]
        """
        fct = []  # prime factor
        b, e = 2, 0  # base, exponent
        while b * b <= n:
            while n % b == 0:
                n = n // b
                e = e + 1
            if e > 0:
                fct.append((b, e))
            b, e = b + 1, 0
        if n > 1:
            fct.append((n, 1))
        return fct
    def combinations_count(n, r):   
        """Return the number of selecting r pieces of items from n kinds of items.
        
        Args:
            n (long): number
            r (long): number
        
        Raises:
            Exception: not defined when n or r is negative
        
        Returns:
            long: number
        """
        # TODO: How should I do when n - r is negative?
        if n < 0 or r < 0:
            raise Exception('combinations_count(n, r) not defined when n or r is negative')
        if n - r < r: r = n - r
        if r < 0: return 0
        if r == 0: return 1
        if r == 1: return n
        numerator = [n - r + k + 1 for k in range(r)]
        denominator = [k + 1 for k in range(r)]
        for p in range(2,r+1):
            pivot = denominator[p - 1]
            if pivot > 1:
                offset = (n - r) % p
                for k in range(p-1,r,p):
                    numerator[k - offset] /= pivot
                    denominator[k] /= pivot
        result = 1
        for k in range(r):
            if numerator[k] > 1:
                result *= int(numerator[k])
        return result
    def combinations_with_replacement_count(n, r):
        """Return the number of selecting r pieces of items from n kinds of items allowing individual elements to be repeated more than once.
        
        Args:
            n (long): number
            r (long): number
        
        Raises:
            Exception: not defined when n or r is negative
        
        Returns:
            long: number
        """
        if n < 0 or r < 0:
            raise Exception('combinations_with_replacement_count(n, r) not defined when n or r is negative')
        elif n == 0:
            return 1
        else:
            return combinations_count(n + r - 1, r)
    from bisect import bisect_left, bisect_right
    from collections import deque, Counter, defaultdict # https://docs.python.org/ja/3/library/collections.html#collections.deque
    from heapq import heapify, heappop, heappush, heappushpop, heapreplace,nlargest,nsmallest # https://docs.python.org/ja/3/library/heapq.html
    from copy import deepcopy, copy # https://docs.python.org/ja/3/library/copy.html
    import operator
    from operator import itemgetter #sort 
    # ex1: List.sort(key=itemgetter(1))
    # ex2: sorted(tuples, key=itemgetter(1,2))
    from functools import reduce, lru_cache
    def chmin(x, y):
        """change minimum
        if x > y, x = y and return (x, True).
        convenient when solving problems of dp[i]
        
        Args:
            x (long): current minimum value
            y (long): potential minimum value
        
        Returns:
            (x, bool): (x, True) when updated, else (x, False)
        """
        if x > y:
            x = y
            return (x, True)
        else:
            return (x, False)
    def chmax(x, y):
        """change maximum
        if x < y, x = y and return (x, True).
        convenient when solving problems of dp[i]
        
        Args:
            x (long): current maximum value
            y (long): potential maximum value
        
        Returns:
            (x, bool): (x, True) when updated, else (x, False)
        """
        if x < y:
            x = y
            return (x, True)
        else:
            return (x, False)

    from fractions import gcd # Deprecated since version 3.5: Use math.gcd() instead.
    def gcds(numbers):
        return reduce(gcd, numbers)
    def lcm(x, y):
        return (x * y) // gcd(x, y)
    def lcms(numbers):
        return reduce(lcm, numbers, 1)
    def make_divisors(n, reversed=False):
        """create list of divisors
        
        Args:
            number (int): number from which list of divisors is created
            reversed (bool, optional): ascending order if False. Defaults to False.
        
        Returns:
            list: list of divisors
        """
        divisors = set()
        for i in range(1, int(n**0.5)+1):
            if n % i == 0:
                divisors.add(i)
                divisors.add(n//i)
        return sorted(list(divisors),reverse=reversed)
    
    # first create factorial_list
    # fac_list = mod_factorial_list(n)
    INF = 10 ** 18
    MOD = 10 ** 9 + 7
    AtoZ = list('abcdefghijklmnopqrsruvwxyz') # 26
    modpow = lambda a, n, p = MOD: pow(a, n, p) # Recursive function in python is slow!
    def modinv(a, p = MOD):
        # evaluate reciprocal using Fermat's little theorem:
        # a**(p-1) is identical to 1 (mod p) when a and p is coprime
        return modpow(a, p-2, p)
    def modinv_list(n, p = MOD):
        if n <= 1:
            return [0,1][:n+1]
        else:
            inv_t = [0,1]
            for i in range(2, n+1):
                inv_t += [inv_t[p % i] * (p - int(p / i)) % p]
            return inv_t
    def modfactorial_list(n, p = MOD):
        if n == 0:
            return [1]
        else:
            l = [0] * (n+1)
            tmp = 1
            for i in range(1, n+1):
                tmp = tmp * i % p
                l[i] = tmp
            return l
    def modcomb(n, k, fac_list = [], p = MOD):
        # fac_list = modfactorial_list(100)
        # print(modcomb(100, 5, modfactorial_list(100)))
        from math import factorial
        if n < 0 or k < 0 or n < k: return 0
        if n == 0 or k == 0: return 1
        if len(fac_list) <= n:
            a = factorial(n) % p
            b = factorial(k) % p
            c = factorial(n-k) % p
        else:
            a = fac_list[n]
            b = fac_list[k]
            c = fac_list[n-k]
        return (a * modpow(b, p-2, p) * modpow(c, p-2, p)) % p
    def modadd(a, b, p = MOD):
        return (a + b) % MOD
    def modsub(a, b, p = MOD):
        return (a - b) % p
    def modmul(a, b, p = MOD):
        return ((a % p) * (b % p)) % p
    def moddiv(a, b, p = MOD):
        return modmul(a, modpow(b, p-2, p))

    class UnionFindTree:
        """union find tree class
        TODO: fix this description...
        how to use (example):
        >>  uf = UnionFindTree(N) 
        >>  if uf.find_root(a) == uf.find_root(b):
        >>      do something
        >>  else:
        >>      do something
        >>      uf.unite(a, b)
        """
        def __init__(self, N):
            self.root = [-1] * (N+1)
            self.rank   = [0]  * (N+1)
            self.connected_num = [1] * (N+1)
    
        def find_root(self,x):
            root = self.root
            while root[x] != -1:
                x = root[x]
            return x
    
        def unite(self,x,y):
            root = self.root
            rank = self.rank
            connected_num = self.connected_num
            find_root = self.find_root
    
            rx = find_root(x)
            ry = find_root(y)
            if rx != ry:
                if rank[rx] < rank[ry]:
                    root[rx] = ry
                    rx,ry = ry,rx
                else:
                    if rank[rx] == rank[ry]:
                        rank[rx] += 1
                    root[ry] = rx       
                connected_num[rx] += connected_num[ry]

    class SegTree:
        """
        ref: https://qiita.com/takayg1/items/c811bd07c21923d7ec69
        init(init_val, ide_ele): 配列init_valで初期化 O(N)
        update(k, x): k番目の値をxに更新 O(logN)
        query(l, r): 区間[l, r)をsegfuncしたものを返す O(logN)
        """
        def __init__(self, init_val, segfunc, ide_ele):
            """
            init_val: 配列の初期値
            segfunc: 区間にしたい操作
            ide_ele: 単位元
            n: 要素数
            num: n以上の最小の2のべき乗
            tree: セグメント木(1-index)
            """
            n = len(init_val)
            self.segfunc = segfunc
            self.ide_ele = ide_ele
            self.num = 1 << (n - 1).bit_length()
            self.tree = [ide_ele] * 2 * self.num
            # 配列の値を葉にセット
            for i in range(n):
                self.tree[self.num + i] = init_val[i]
            # 構築していく
            for i in range(self.num - 1, 0, -1):
                self.tree[i] = self.segfunc(self.tree[2 * i], self.tree[2 * i + 1])

        def update(self, k, x):
            """
            k番目の値をxに更新
            k: index(0-index)
            x: update value
            """
            k += self.num
            self.tree[k] = x
            while k > 1:
                self.tree[k >> 1] = self.segfunc(self.tree[k], self.tree[k ^ 1])
                k >>= 1

        def query(self, l, r):
            """
            [l, r)のsegfuncしたものを得る
            l: index(0-index)
            r: index(0-index)
            """
            res = self.ide_ele
            l += self.num
            r += self.num
            while l < r:
                if l & 1:
                    res = self.segfunc(res, self.tree[l])
                    l += 1
                if r & 1:
                    res = self.segfunc(res, self.tree[r - 1])
                l >>= 1
                r >>= 1
            return res

    # ************ Graph ************
    # Graph: https://en.wikipedia.org/wiki/Directed_graph
    # 最短経路問題: https://ja.wikipedia.org/wiki/%E6%9C%80%E7%9F%AD%E7%B5%8C%E8%B7%AF%E5%95%8F%E9%A1%8C
    
    # Bellman-Ford: O(|V||E|). Use this if there exists an edge with negative length in the graph
    # After N steps, the shortest path has converded if there doesn't exist an cycle of edges with negative
    # Watch out: d[N] == d[2*N] doesn't necessarily mean the graph doesn't have negative cycle
    # ref: https://www.youtube.com/watch?v=1Z6ofKN03_Y

    def BellmanFord(N, M, ABC, vertex_start, vertex_end, value_if_inf = -1, find_shortest = False):
        """to calculate furthest or shortest length between vertex_start and vertex_end using BellmanFord algorithm
        
        Args:
            N (int): number of vertices
            M (int): number of edges
            ABC (list): [(ai, bi, ci) for _ in range(N)] where i-th edge is directed from vertex ai to vertex bi and the length is ci 
            vertex_start (int): start vertex. usually use 0.
            vertex_end (int): end vertex. usually use N-1.
            value_if_inf (int or string as you like, optional): value you want when the furthest (or shortest) distance is infinite (or -infinite). Defaults to -1.
            find_shortest (bool, optional): choose False to find furthest path. Defaults to False.
        
        Returns:
            int or string: normally int (but can be str if you set value_if_inf to str)
            
        Example:
                N, M, P = R()
                ABC = [R() for _ in range(M)]
                ABC = [(a-1, b-1, c-P) for a, b, c in ABC]
                print(BellmanFord(N, M, ABC, 0, N-1, value_if_inf = 'inf'))

        """

        def make_reachable_list(N, M, ABC, vertex_start, vertex_end):
            reachable_to_direct = defaultdict(list)
            reachable_from_direct = defaultdict(list)
            reachable_from_start = [False] * N
            reachable_to_end = [False] * N
            reachable_from_start[vertex_start] = True
            reachable_to_end[vertex_end] = True
            reachable_from_both_sides = [False] * N
            dfs_from_start = []
            dfs_to_end = []
            for a, b, c in ABC:
                reachable_to_direct[a].append(b)
                reachable_from_direct[b].append(a)
                if a == vertex_start:
                    dfs_from_start.append(b)
                    reachable_from_start[b] = True
                if b == vertex_end:
                    dfs_to_end.append(a)
                    reachable_to_end[a] = True
            while dfs_from_start:
                v = dfs_from_start.pop()
                for i in reachable_to_direct[v]:
                    if not reachable_from_start[i]:
                        reachable_from_start[i] = True
                        dfs_from_start.append(i)
            while dfs_to_end:
                v = dfs_to_end.pop()
                for i in reachable_from_direct[v]:
                    if not reachable_to_end[i]:
                        reachable_to_end[i] = True
                        dfs_to_end.append(i)
            for i in range(N):
                reachable_from_both_sides[i] = reachable_from_start[i] and reachable_to_end[i]
            return reachable_from_both_sides
        
        reachable_from_both_sides = make_reachable_list(N, M, ABC, vertex_start, vertex_end)
        
        if find_shortest:
            dist = [INF for i in range(N)]
        else:
            dist = [-INF for i in range(N)]
        
        dist[vertex_start] = 0
        for i in range(N):
            updated = False
            for a, b, c in ABC:
                if not reachable_from_both_sides[a]:
                    continue
                elif find_shortest:
                    update_condition = dist[a] + c < dist[b]
                else:
                    update_condition = dist[a] + c > dist[b]
                if dist[a] != INF and update_condition:
                    dist[b] = dist[a] + c
                    updated = True
                    if i == N-1:
                        return value_if_inf
            if not updated:
                break
        return dist[vertex_end]

    # Warshall Floyd O(V**3)
    def warshall_floyd(number_vertex, XYD, shift_one_for_vertex=False):
        # ref: https://juppy.hatenablog.com/entry/2018/11/01/%E8%9F%BB%E6%9C%AC_python_%E5%85%A8%E7%82%B9%E5%AF%BE%E6%9C%80%E7%9F%AD%E7%B5%8C%E8%B7%AF%E6%B3%95%EF%BC%88%E3%83%AF%E3%83%BC%E3%82%B7%E3%83%A3%E3%83%AB%E3%83%95%E3%83%AD%E3%82%A4%E3%83%89%E6%B3%95
        # number_vertex: len(vertex)
        # XYD: list of distance from x to y
        # shift_one_for_vertex: XYDの値が1~Nの時(0~N-1でない時)に調整するフラグ。
        # d[i][j]: iからjへの最短距離
        d = [[float("inf")]*number_vertex for i in range(number_vertex)]
        for x, y, dist in XYD:
            if shift_one_for_vertex:
                x = x - 1
                y = y - 1
            d[x][y] = dist
            d[y][x] = dist
        for i in range(number_vertex):
            d[i][i] = 0 # distance of same vertex is 0
        for k in range(number_vertex):
            for i in range(number_vertex):
                for j in range(number_vertex):
                    d[i][j] = min(d[i][j],d[i][k] + d[k][j])
        return d


    """ initialize variables and set inputs
    # initialize variables
        # to initialize list, use [0] * n
        # to initialize two dimentional array:
            # ex) [[0] * N for _ in range(N)]
            # ex2) dp = [[0] * (N+1) for _ in range(W*2)]
    # set inputs
        # put inputs between specific values (almost as quickly)
        # ex) S = [-INF] + [int(r()) for _ in range(A)] + [INF]
        # open(0).read() is sometimes useful:
        # ex) n, m, *x = map(int, open(0).read().split())
        #     min(x[::2]) - max(x[1::2])
        # ex2) *x, = map(int, open(0).read().split())
        #     don't forget to add comma after *x if only one variable is used
    # preprocessing
        # transpose = [x for x in zip(*data)]
        # ex) [[1, 2, 3], [4, 5, 6], [7, 8, 9]] => [(1, 4, 7), (2, 5, 8), (3, 6, 9)]
        # flat = [flatten for inner in data for flatten in inner]
        # ex) [[1, 2, 3], [4, 5, 6], [7, 8, 9]] => [1, 2, 3, 4, 5, 6, 7, 8, 9]
    # calculate and output
        # output pattern
        # ex1) print(*l) => when l = [2, 5, 6], printed 2 5 6
    """

    # functions to read input
    r = lambda: sys.stdin.readline().strip()
    r_int = lambda: int(r())
    r_float = lambda: float(r())
    R = lambda: list(map(int, r().split()))
    R_str = lambda: r().split()
    R_map = lambda: map(int, r().split())
    R_float = lambda: list(map(float, r().split()))
    R_tuple = lambda: tuple(map(int, r().split()))

    """ how to treat input
    # single int: int(r())
    # single string: r()
    # single float: float(r())
    # line int: R()
    # line string: r().split()
    # line (str, int, int): [j if i == 0 else int(j) for i, j in enumerate(r().split())]
    # lines int: [R() for _ in range(n)]
    """

    # for test
    if sample_file:
        sys.stdin = open(sample_file)
        
    # ----------------------------------
    # main
    #%%
    X, N = R()
    if N == 0:
        print(X)
        return
    P = R()
    l = [0] * 101
    for p in P:
        l[p] = 1
    
    tmp = INF
    tmp2 = -1
    for i in range(102):
        if l[i] == 1:
            continue
        if abs(X-i) < tmp:
            tmp = abs(X-i)
            tmp2 = i
    print(tmp2)
    
    #%%
    # end of main
    # ----------------------------------

    """memo: how to use defaultdict of list
    # initialize
    Dic = defaultdict(list)
    # append / extend
    Dic[x].append(y)
    # three methods for loop: keys(), values(), items()
    for k, v in Dic.items():
    """
    
    """memo: how to solve binary problems
    # to make binary digits text
    >>> a = 5
    >>> bin_str_a = format(a, '#06b')
    >>> print(bin_str_a)
    0b0101 # first 2 strings (='0b') indicates it is binary
    """
    
    """memo: how to solve the problem
    creating simple test/answer
    greed
    simple dp
    graph
    """

if __name__ == '__main__':
    main()

Submission status: Runtime Error

Solution code:
from sys import stdin
X,Y = [int(x) for x in stdin.readline().rstrip().split()]
P = [int(x) for x in stdin.readline().rstrip().split()]
tmp = 10**9+7
P = set(list(range(0,101))) - set(P)
P.sort(reverse=True)


ans = 0
for i in P:
    if abs(i-X) <= tmp:
        ans = i
        tmp = abs(i-X)
        
print(ans)

Submission status: Runtime Error

Solution code:
X, N = map(int, input().split())
p = list(map(int, input().split()))

p.sort()
def main():
    l = [True for _ in range(100)]
    for x in p:
        l[x-1] = False
    diff = 0
    while True:
        if l[X-1 -diff]:
            print(X -diff)
            return
        elif l[X-1 +diff]:
            print(X +diff)
            return
        diff += 1

main()

Submission status: Runtime Error

Solution code:
X,N = map(int,input().split())
if N>0:
    p = list(map(int,input().split()))
ans = []
for i in range(100):
    ans.append(X-i)
    ans.append(X+i)
import sys
for j in ans:
    if j not in p:
        print(j)
        sys.exit()

Submission status: Runtime Error

Solution code:
x, n = map(int, input().split())
p = list(map(int, input().split()))

if n == 0:
    print(x)
else:
    num = set(range(1, 101)) ^ set(p)
    num = sorted([[abs(i - x), i] for i in num])
    
    if len(num) >= 2 and num[0][0] == num[1][0]:
        print(min(num[0][1], num[1][1]))
    else:
        print(num[0][1])

Submission status: Runtime Error

Solution code:
import bisect

x, n = map(int, input().split())
if n == 0:
    print(x)
    exit()
p = list(map(int, input().split()))
tmp = []

for i in range(1, 101):
    if i not in p:
        tmp.append((abs(i - x), i))

print(min(tmp)[1])

Submission status: Runtime Error

Solution code:
x,n=map(int,input().split())
if n==0:
    print(x)
else:
    P=list(map(int,input().split()))
    N=[i for i in range(1,101)]

    for p in P:
        N.pop(N.index(p))

    L=[]
    for i in range(n):
        l=abs(N[i]-x)
        L.append(l)
    m=L.index(min(L))
    print(N[m])

Submission status: Runtime Error

Solution code:
x, n = list(map(int, input().split()))

if n != 0:
  p = list(map(int, input().split()))
  lists = []
  for i in range(1, 101):
    if i in p:
      continue
    lists.append(i)

  ans = lists[0]
  dist = abs(lists[0]-x)
  for i in range(len(lists)):
    if dist > abs(lists[i]-x):
      ans = lists[i]
      dist = abs(lists[i]-x)
  print(ans)
  
else:
  print(x)

Submission status: Runtime Error

Solution code:
x, n = map(int, input().split())
p = list(map(int, input().split()))
p = sorted(p)


if x not in p:
    ans = x
else:
    for i in range(1, 100-x+1):
        if x + i not in p:
            ans = x + i
            break
        elif x - i not in p:
            ans = x - i
            break
        else:
            pass

print(ans)

Submission status: Runtime Error

Solution code:

import sys
stdin = sys.stdin

def ns(): return stdin.readline().rstrip()
def ni(): return int(ns())
def na(): return list(map(int, stdin.readline().split()))

x, n =na()
p = na()
notp = list()
for i in range(1, 101):
    if i in p:
        continue
    notp.append(i)
ans = notp[0]

for i in notp:
    if abs(ans - x) > abs(i - x):
        ans = i
print(ans)

Submission status: Runtime Error

Solution code:
import numpy as np

X, N = map(int, input().split())
P = np.array(list(map(int, input().split())))

P = P - X

for i in range(0, X):
    if i not in P or -i not in P:
        if -i not in P:
            ans = X - i
        else:
            ans = X + i
        break

print(ans)

Submission status: Runtime Error

Solution code:
#

import sys
input=sys.stdin.readline

def main():
    X,N=map(int,input().split())
    p=list(map(int,input().split()))
    ans=[]
    for i in range(max(X,100-X)):
        if not X+i in p:
            ans+=[X+i]
        if not X-i in p:
            ans+=[X-i]
        if len(ans)>0:
            break
    print(min(ans))
    
if __name__=="__main__":
    main()

Submission status: Runtime Error

Solution code:

X, N = map(int, input().split())
if N != 0:
    P = list(map(int, input().split()))
    # a,b=map(int, input().split())  #複数数値入力　「A B」みたいなスペース空いた入力のとき
    # c=list(map(int, input().split()))  #リスト入力 「a1 a2 a3 ...」みたいな配列のような入力のとき
    # s=[list(map(int,list(input()))) for i in range(h)]  # 二次元配列入力　二次元マップみたいな入力のとき
    
    #K = int(input())
    #S = input()
    
    ##一次元配列の初期化
    #a=[0]*5
    #[i for i in range(100) if i%2==1] #奇数のみ
    ##二次元配列の初期化
    #[[float("inf") for i in range(N)] for i in range(N)]
    
    for diff in range(0,102):
        if X-diff not in P:
            print(X-diff)
            break
        elif X+diff not in P:
            print(X+diff)
            break
else:
    print(N)
#import numpy as np
#import math

X, N = map(int, input().split())
if N != 0:
    P = list(map(int, input().split()))
    # a,b=map(int, input().split())  #複数数値入力　「A B」みたいなスペース空いた入力のとき
    # c=list(map(int, input().split()))  #リスト入力 「a1 a2 a3 ...」みたいな配列のような入力のとき
    # s=[list(map(int,list(input()))) for i in range(h)]  # 二次元配列入力　二次元マップみたいな入力のとき
    
    #K = int(input())
    #S = input()
    
    ##一次元配列の初期化
    #a=[0]*5
    #[i for i in range(100) if i%2==1] #奇数のみ
    ##二次元配列の初期化
    #[[float("inf") for i in range(N)] for i in range(N)]
    
    for diff in range(0,102):
        if X-diff not in P:
            print(X-diff)
            break
        elif X+diff not in P:
            print(X+diff)
            break
else:
    print(X)

Submission status: Runtime Error

Solution code:
x,n= map(int, input().split())
if n == 0:
  print(x)
  exit(0)
p = [int(x) for x in input().split()]
pp = []
for i in range(1,101):
  if not i in p:
    pp.append(i)
a = []
for i in pp:
  a.append(abs(x-i))
b = min(a)
c = []
for i,j in enumerate(a):
  if b == j:
    c.append(pp[i])
print(min(c))

Submission status: Runtime Error

Solution code:
X, N = map(int, input().split())
P = list(map(int, input().split()))
if(N == 0):
    print(X)
    exit(0)

if(N == 100):
    print(min(X - 0, 101 - X))
L = []
for i in range(1, 101):
    if(i in P): continue
    else: L.append(i)
m = 1000
for l in L:
    m = min(m, abs(X - l))
ans = []
for l in L:
    if(abs(X - l) == m):
        ans.append(l)
ans.sort()
print(ans[0])

Submission status: Runtime Error

Solution code:
X,N = list(map(int,input().split()))
if N == 0:
    print(X)
else:
    P = list(map(int,input().split()))
    A = []
    B = []
    for i in range(101):
        if i not in P and i <= X:
            A.append(i)
        elif i not in P and i > X:
            B.append(i)
    A = sorted(A,reverse=True)
    B = sorted(B)
    a = X - A[0]
    b = B[0] - X
    if a <= b:
        print(A[0])
    else:
        print(B[0])

Submission status: Runtime Error

Solution code:
x,n=map(int,input().split())
p = list(map(int,input().split()))
p.sort()
b = []
for i in range(1,101):
    if not (i in p):
        b.append((i,abs(i-x)))

b.sort(key=lambda x:x[1])
print(b[0][0])

Submission status: Runtime Error

Solution code:
x, n = map(int, input().split())
p = [int(_) for _ in input().split()]

arr = [0] * 101
for i in p:
    arr[i] = 1

ans, cnt = 0, 0
for i in range(x, -1, -1):
    if arr[i] == 0:
        ans = i
        break
    else:
        cnt += 1

if cnt == x:
    cnt = 10000

#print(arr)
#print(cnt)

cnt2 = 0
for i in range(x, 102):
    if arr[i] == 0:
        if cnt2 < cnt:
            ans = i
        break
    else:
        cnt2 += 1

print(ans)

Submission status: Runtime Error

Solution code:
x,n = map(int,input().split())
p = list(map(int,input().split()))
p1 = [i for i in range(1,101)]
for i in p:
    if i in p1:
        p1.remove(i)
ans = 1000
al = []

for i in p1:
    ans = min(abs(i-x),ans)
    if ans >= abs(i-x):
        al.append(i)

if len(al) == 0:
    if x < 50:
        print(0)
    else:
        print(101)
elif abs(al[-1]-x) == abs(al[-2]-x):
    print(al[-2])
else:
    print(al[-1])

Submission status: Runtime Error

Solution code:
from sys import stdin, setrecursionlimit


def main():
    input = stdin.buffer.readline
    x, n = map(int, input().split())
    p = list(map(int, input().split()))
    arr = []
    for i in range(1, 101):
        if not i in p:
            arr.append(i)
    ans = arr[0]
    for ai in arr:
        if abs(ai - x) < abs(ans - x):
            ans = ai
    print(ans)


if __name__ == "__main__":
    setrecursionlimit(10000)
    main()

Submission status: Runtime Error

Solution code:
x,n = map(int,input().split())
p = list(map(int,input.split()))
i = 0
ans = 0
while True:
  if(x-1 in p):
    if(x+1 in p):
      None
    else:
      ans = x+1
      break
  else:
    ans = x-1
    break
  i += 1
print(ans)

Submission status: Runtime Error

Solution code:
x,n=list(map(int, input().split()))
l=list(map(int, input().split()))
l.sort()
HA=101
ans=101
for i in range(n+1):
  if i not in l:
  	if abs(i-x)<HA:
        HA=abs(i-x)
    	ans=i
print(ans)

Submission status: Runtime Error

Solution code:
x, n = map(int, input().split())
if n == 0:
    print(x)
    exit()
p = list(map(int, input().split()))
q = []
for i in range(1, 101):
    if i in p:continue
    q.append(i)

import bisect
ind = bisect.bisect_left(q, x)
#print(ind)

temp1 = abs(q[ind - 1] - x)
temp2 = abs(q[ind] - x)
if temp1 <= temp2:print(q[ind - 1])
else:print(q[ind])

Submission status: Runtime Error

Solution code:
X, N = map(int, input().split())
if(N == 0):
    print(X)
    exit(0)

P = list(map(int, input().split()))
if(N == 100):
    print(min(X - 0, 101 - X))
L = []
for i in range(1, 101):
    if(i in P): continue
    else: L.append(i)
m = 1000
for l in L:
    m = min(m, abs(X - l))
ans = []
for l in L:
    if(abs(X - l) == m):
        ans.append(l)
ans.sort()
print(ans[0])