摘要：
Description "题目链接" Solution 可以根据条件构造出一个矩阵， 1 3 9 27 81... 2 6 18.... 4 12 36... 这个矩阵满足$G[i][1]=G[i 1][1] 2(1 include include define N 100010 using nam 阅读全文
摘要：
Description "题目链接" Solution 这题跟数列的中位数有关， 具体证明见刘汝佳的蓝皮书里 Code c++ include include include define N 1000010 define ll long long using namespace std; int 阅读全文