import sys

def searchDigit(digits: list, target: int):
    for i in digits:
        if i == target:
            return target
    return False

def searchMax(digits: list, target: int) -> bool:
    f_flag: bool = True
    for _ in digits:
        if _ < target:
            f_flag: bool = True
        else:
            f_flag: bool = False
            break

    if f_flag == True:
        return True
    return False

def searchMin(digits: list, target: int) -> bool:
    t_flag: bool = True
    for x in digits:
        if x > target:
            t_flag: bool = True
        else:
            t_flag: bool = False
            break

    return t_flag

def main():

    n = int(input())
    digits = list(map(int, input().split()))
    target = int(input())

    if searchDigit(digits, target):
        print(searchDigit(digits, target))
        return 0


    if searchMax(digits, target):
        print(max(digits))
        return 0

    elif searchMin(digits, target):
        print(min(digits))
        return 0



    for num1 in range(1, 999):
        for k in digits:
            if k + num1 == target:
                print(k)
                return 0

    for num2 in range(1, 999):
        for k in digits:
            if k - num2 == target:
                print(k)
                return 0


    for l in digits:
        if l + 1 == target:
            print(l)
            return 0

    for k in digits:
        if k - 1 == target:
            print(k)
            return 0

if __name__ == '__main__':
    main()