l=[]
t=-3
p=0
c=int(input("Enter range of elements = "))
for i in range(0,c):
n=int(input("Enter the digit = "))
l.append(n)
l.sort()
print()
for i in range(0,c):
t+=2
s=(t+1)//2
for k in range(c-1,i,-1):
print(' ',end="")
for j in range(0,t+2):
if s==0:
p=1
print(l[s],end="")
if s>0 and p!=1:
s-=1
else:
s+=1
p=0
print()