2012年9月8日
USCAO section 2.3 Zero Sum（dfs）
摘要： Zero SumConsider the sequence of digits from 1 through N (where N=9) in increasing order:1 2 3 ... N. Now insert either a `+' for addition or a `-' for subtraction or a ` ' [blank] to run the digits together between each pair of digits (not in front of the first digit). Calculate the res 阅读全文
posted @ 2012-09-08 20:48 剑不飞 阅读(223) 评论(0) 推荐(0)