https://www.acmicpc.net/problem/16435
import sys
input = sys.stdin.readline
fruit, snakebird = map(int, input().rstrip().split())
fruit_list = list(map(int, input().rstrip().split()))
fruit_list.sort()
for fruit in fruit_list:
if snakebird >= fruit:
snakebird += 1
print(snakebird)