import sys
input = sys.stdin.readline

N,S=list(map(int,input().split()))
A=list(map(int,input().split()))

A.sort(reverse=True)

OK=max(A)
NG=0

while OK>NG+1:
    mid=(OK+NG)//2

    sc=0

    for i in range(0,len(A),mid):
        if A[i]<=mid:
            continue
        sc+=A[i]

    #print(mid,sc)

    if sc<S:
        OK=mid
    else:
        NG=mid

print(OK)