import time
import sys
fin=open("in_14_5.txt",'r')
list1=fin.readline().split(",")
t1=time.clock()
n=int(list1[0])
c1=int(list1[1])
a=[]
String=""
for i in range(2,len(list1)):      
    a.append(int(list1[i]))

a.sort()
c=0
for j in range(len(a)):
    c1=c1-a[j]
    c=c+1
    if(c1%((n-1)-j)==0):
        c=c+3
        number=c1/((n-1)-j)
        String=String+str(number)
        break
Memory=sys.getsizeof(String)+sys.getsizeof(a)+sys.getsizeof(n)+sys.getsizeof(c1)+sys.getsizeof(number)+sys.getsizeof(i)+sys.getsizeof(j)+sys.getsizeof(list1)
fout=open("out_35_14_5.txt",'w')
fout.write(String)
fout.write("\nArithmetic Operations= "+str(c)+"\n Time Taken ="+str(time.clock()-t1)+"\n memory Used="+str(Memory))