time limit per test2 seconds memory limit per test256 megabytes inputstandard input outputstandard output The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or water. The map is surrou…
Least Common Ancestors 节点范围是1~1e18,至多1000次询问. 只要不断让深的节点退一层(>>1)就能到达LCA. 用点来存边权,用map储存节点和父亲连边的权值. #include<cstdio> #include<map> #define ll long long using namespace std; map<ll,ll>m; ll u,v,w; void add(){ while(u!=v){ if(u<v){ m…