# coding=UTF-8
# 题目:打印出杨辉三角形(要求打印出10行如下图)。
if __name__ == '__main__':
 a = []
 for i in range(10):
 a.append([])
 for j in range(10):
 a[i].append(0)
 for i in range(10):
 a[i][0] = 1
 a[i][i] = 1
 for i in range(2, 10):
 for j in range(1, i):
 a[i][j] = a[i - 1][j - 1] + a[i - 1][j]
 from sys import stdout

 for i in range(10):
 for j in range(i + 1):
 stdout.write(str(a[i][j]))
 stdout.write(' ')
 print