import math

print('N K = ', end='')
n, k = (int(x) for x in input().split())

card = [i + 1 for i in range(n)]

for _ in range(k):
    print('i = ', end='')
    i = int(input()) - 1
    temp = card[i]
    card.remove(i)
    card.insert(0, temp)

print(card[0])