#!/usr/bin/env python
# -*- coding: utf-8 -*-

N,M = map(int,input().split())
C = sorted(list(map(int,input().split())))

min_i = 0
i = 0
while M > 0:
    M -= 1
    C[i] -= 1
    if C[i] == 0:
        min_i += 1

    i += 1
    if i >= N:
        i = min_i
    if C.count(0) == N:
        break

print(sum([1 if C[i] <= 0 else 0 for i in range(N)]))