n=int(input("Enter the no of row : "))
for r in range(1,n+1):
p=r
fl=0
for s in range(1,n-r+1):
print(" ",end='')
for c in range(1,(2*r)):
print(p,end='')
if p==1:
fl=1
if fl==1:
p=p+1
else:
p=p-1
print()