u011535421的博客

void makelca(){ rep(j, 1, 23){ rep(i, 1, n+1){ fa[i][j] = fa[fa[i][j-1]][j-1]; ///循环顺序 细节1 } } } int lca(int x, int y){ if (depth[x] < depth[y]) swap(x, y);...

http://codeforces.com/contest/983/problem/E   E. NN country time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output In the NN country, ...