t = 1
#t = int(input())
def check(x):
  cur = 0
  now = 0
  for i in range(n):
    if a[i] <= x:
      break
    if now == 0:
      cur += a[i]
    now = (now+1)%x

  if cur <= s:
    return True
  return False
for _ in range(t):
  n,s = map(int, input().split())
  a = list(map(int, input().split()))
  a.sort(reverse = True)
  l = 10**18
  r = 0
  s -= 1
  while abs(l-r) > 1:
    m = (l+r)//2
    if check(m):
      l = m
    else:
      r = m
  print(l)