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  1. n,m = [int(i) for i in input().split()]
  2. z= int(1) 
  3. a = [["0"]*m for i in range(n)]
  4. for i in range(n):
  5.     if i%2 == 0:
  6.         for j in range(0,m,2):
  7.             a[i][j] = z
  8.             z+=1
  9.     elif i%2 == 1:
  10.         for j in range(1,m,2):
  11.             a[i][j] = z
  12.             z+=1
  13. for row in a:
  14.     print(*row)
Success #stdin #stdout 0.02s 9308KB
comments (?)
stdin 
10 10
stdout 
1 0 2 0 3 0 4 0 5 0
0 6 0 7 0 8 0 9 0 10
11 0 12 0 13 0 14 0 15 0
0 16 0 17 0 18 0 19 0 20
21 0 22 0 23 0 24 0 25 0
0 26 0 27 0 28 0 29 0 30
31 0 32 0 33 0 34 0 35 0
0 36 0 37 0 38 0 39 0 40
41 0 42 0 43 0 44 0 45 0
0 46 0 47 0 48 0 49 0 50
https://ideone.com/wGdNHx
List Comprehensions
language:
Python 3 (python  3.12)
created:
5 years ago
visibility:
secret

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