题解 | #蛇形矩阵#

n=int(input())
lst=[]
tps=[]
for i in range(1,n+1):
    res=tps[1:]
    if i==1:
        for p in range(1,n-i+2):
            res.append(p*(p+1)//2)
    else:
        for p in range(n-i+1):
            res[p]=tps[p+1]-1
    lst.append(res)
    tps=res
for i in lst:
    t=map(str,i)
    print(' '.join(t))