题解 | #蛇形矩阵#

while True:
    try:
        N=int(input())
        li=[i+1 for i in range((N+1)*N//2)]
        for i in range(N):
            x=-1
            y=1
            ll=[]
            for j in range(0,N-i):
                x+=y
                y+=1
                print(li[x],end=' ')
                ll.append(li[x])
            print()
            li=sorted(list(set(li)-set(ll)))

    except:
        break