题解 | #蛇形矩阵#

n=int(input())
res=[[0]*n for _ in range(n)]
res[0][0]=1
for i in range(1,n):
    res[i][0]=res[i-1][0]+i
for i in range(n):
    for j in range(1,n-i):
        res[i][j]=res[i][j-1]+j+i+1

for i in range(n):
    print(' '.join(str(i) for i in res[i][:n-i] ))