def main():
    N = int(input())
    ary= list(map(int,input().split()))
    if N>=2:
        for i in range(N-1):
           a = ary.pop(ary.index(min(ary)))
           b = ary.pop(ary.index(max(ary)))
           ary.append(b+a//2)
    print(ary[0])
main()