box,toru=map(int,input().split())
ls=[int(i) for i in input().split()]
ls.sort()

flg=0
while True:
     for i in range(len(ls)):
          if ls[i]!=0:
               ls[i]-=1
               toru-=1
          if toru==0:
               flg=1
               break
     if flg==1:
          break
     
print(ls.count(0))