import sys
input = sys.stdin.readline
N = int(input())
req = list(map(int, input().split()))
M = int(input())
lo = 0
hi = max(req)
mid = (lo + hi) // 2
ans = 0
def is_possible(mid):
return sum(min(r, mid) for r in req) <= M
while lo <= hi:
# print(f'lo: {lo}, mid: {mid}, hi: {hi}, ans: {ans}')
if is_possible(mid):
lo = mid + 1
ans = mid
else:
hi = mid -1
mid = (lo + hi) // 2
print(ans)