摘要:
Description 给定长度为n的序列:a1,a2,…,an,记为a[1:n]。类似地,a[l:r](1≤l≤r≤N)是指序列:al,al+1,…,ar-1,ar。若1≤l≤s≤t≤r≤n,则称a[s:t]是a[l:r]的子序列。现在有q个询问,每个询问给定两个数l和r,1≤l≤r≤n,求a[l 阅读全文
摘要:
Description Byteasar has designed a supercomputer of novel architecture. It may comprise of many (identical) processing units. Each processing unit ca 阅读全文