Answer to Question #225335 in Python for say

Question

Trapezium Order

You are given an integer N Print N rows starting from 1 in

the trapezium 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-separated stegers as per the trapezium order.

Sample Input 1

4

Sample Output 1

1 2 3 4 17 18 19 20

5 6 7 14 15 16

8 9 12 13

10 11

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]))
	start += i
	sto