Answer to Question #233861 in Python for srikanth

Question

Trapezium Order

you are given an integer N . print N rows starting from 1 in the trapexium order as shown in the output of the below examples .

Input

the input contains an integer N

OUTPUT

the output should have N lines

each of the N lines should have space -seperated integers as per the trapezium order

Sample input:
4

Sample output:
 1 2 3 4 17 18 19 20
  5 6 7 14 15 16
   8 9 12 13
    10 11

please provide the correct output and also correct spaces also given.

Answer 1

n = int(input())
mx = n*(n+1)
lst = [i+1 for i in range(mx)]
start = 0
stop = len(lst)
for i in range(n,0,-1):
	print(*(lst[start:start+i] + lst[stop-i:stop]))
	print(' '*(n-i+1),end='')
	start += i
	stop -= i