Answer to Question #267006 in Python for siva

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 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())
leftTerm = 1
rightTerm = N * N + 1
  
for i in range(N, -1, -1):
    for _ in range(N, i-1, -1):
        print(" ", end ="")
    for j in range(1, i + 1): 
        print(str(leftTerm)+" ", end ="")
        leftTerm += 1
 
    for j in range(1, i + 1): 
        print(rightTerm, end ="")
        if j < i:
            print(" ", end ="")
        rightTerm += 1
        
    rightTerm =rightTerm- (i - 1) * 2 - 1 
    print()