题解 | #蛇形矩阵#

from re import M
n=int(input())
l=[]
m=1
for i in range(1,n+1):
    l.append([])
    for x in range(1,i+1):
        a=i-x
        l[int(a)].append(m)
        m+=1
for i in range(n):
    for x in range(n-i-1):
        print(l[i][x],end=" ")
    print(l[i][-1])