Problem S: 数字直角三角(每行递增,行号开头)

Problem S: 数字直角三角(每行递增,行号开头)

[Creator : ]
Time Limit : 1.000 sec  Memory Limit : 128 MiB

Description

Sample Input Copy

5

Sample Output Copy

1
2 3
4 5 6
7 8 9 10
11 12 13 14 15