题解 | #[NOIP2008]笨小猴#
添加逗号
http://www.nowcoder.com/practice/f51c317e745649c0900996fd3f683aed
n = ' '.join(input()).split() num = len(n) // 3 if len(n) % 3 == 0 else len(n)//3 + 1 if len(n) > 3: for i in range(1, num): n.insert(-4 * i + 1, ',') print(''.join(n))
