N, S = map(int, input().split())
A = sorted(list(map(int, input().split())), reverse=True)
L, R = 1, A[0]

while L < R:
    M = (L + R) // 2
    B = [i for i in A if i > M]

    if sum(B[::M]) < S:
        R = M
    else:
        L = M + 1

print(L)