摘要：A sequence of N positive integers (10 include include using namespace std; const int maxn=1e5+5; int sum[maxn]; int main() { int t; cin t; while(t ) { 阅读全文

摘要：``` include include include include using namespace std; const int eps=1E 8; typedef vector vec; typedef vector mat; //求解Ax=b，A是方阵 //当方程组无解或者有无穷多解时，返回 阅读全文

摘要：Given a set of sticks of various lengths, is it possible to join them end to end to form a square? Input The first line of input contains N, the numbe 阅读全文

摘要：Farmer John and Betsy are playing a game with N (1 B C从高到底的三个方块，那么dis[A C]=dis[B C]+dis[A B]。需要注意的是路径压缩的时候，递归求节点到根节点的距离，具体请看代码。 include include using 阅读全文