摘要:
http://acm.hust.edu.cn/vjudge/contest/view.action?cid=27938#problem/E题目大意:Given,n, count the number of solutions to the equationx+2y+2z=n, wherex,y,z,... 阅读全文
摘要:
DescriptionLet S = s1 s2...s2n be a well-formed string of parentheses. S can be encoded in two different ways:q By an integer sequence P = p1 p2...pn ... 阅读全文