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  1. n = int(input())
  2. c = 1
  3.  
  4. for i in range(1, n + 1):
  5.     for j in range(i):
  6.         print(c, end=" ")
  7.         c += 1
  8.     print()
  9.  
  10. c -= n 
  11.  
  12. for i in range(n, 0, -1):
  13.     for j in range(i):
  14.         print(c, end=" ")
  15.         c += 1
  16.     print()
  17.     c=c-i-i+1
  18.  
Success #stdin #stdout 0.13s 13996KB
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stdout
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1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15 
11 12 13 14 15 
7 8 9 10 
4 5 6 
2 3 
1
https://ideone.com/P9Qt6Z
language:
Python 3 (python  3.12)
created:
1 day ago
visibility:
public

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