题解 | #蛇形矩阵#

n = int(input())
dp = [[]for i in range(n)]
num = 1


for i in range(n):
    for j in range(i+1):        #
        dp[i].append(num)
        num += 1

for i in range(n):
    for j in dp:
        if j:
            print(j.pop(),end=' ')
    print()