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- n,m=map(int,input().split())
- a=[0]*m
- for i in range(m):
- a[i]=[0]*n
- k=0
- for i in range(n):
- for j in range(m):
- k=k+1
- a[j][i]=k
- for i in range(n):
- for j in range(m//2):
- if i % 2 == 1:
- a[j][i],a[-j-1][i] = a[-j-1][i], a[j][i]
- for i in range(n):
- print(*a[i])
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