answer.code:1:1: error: ‘vector’ does not name a type
    1 | vector<int> adj[N];
      | ^~~~~~
answer.code:4:5: error: ‘vector’ does not name a type
    4 |     vector<int> dep,pt,hd,idx,sz,par,vis;
      |     ^~~~~~
answer.code: In constructor ‘HLD::HLD(int)’:
answer.code:8:9: error: ‘pt’ was not declared in this scope; did you mean ‘_t’?
    8 |         pt.assign(n,-1),hd.assign(n,-1),par.assign(n,-1);
      |         ^~
      |         _t
answer.code:8:25: error: ‘hd’ was not declared in this scope
    8 |         pt.assign(n,-1),hd.assign(n,-1),par.assign(n,-1);
      |                         ^~
answer.code:8:41: error: ‘par’ was not declared in this scope
    8 |         pt.assign(n,-1),hd.assign(n,-1),par.assign(n,-1);
      |                                         ^~~
answer.code:9:9: error: ‘idx’ was not declared in this scope
    9 |         idx.assign(n,0),sz.assign(n,0),dep.assign(n,0),vis.assign(n,0);
      |         ^~~
answer.code:9:25: error: ‘sz’ was not declared in this scope
    9 |         idx.assign(n,0),sz.assign(n,0),dep.assign(n,0),vis.assign(n,0);
      |                         ^~
answer.code:9:40: error: ‘dep’ was not declared in this scope
    9 |         idx.assign(n,0),sz.assign(n,0),dep.assign(n,0),vis.assign(n,0);
      |                                        ^~~
answer.code:9:56: error: ‘vis’ was not declared in this scope
    9 |         idx.assign(n,0),sz.assign(n,0),dep.assign(n,0),vis.assign(n,0);
      |                                                        ^~~
answer.code: In member function ‘void HLD::dfs1(int, int)’:
answer.code:17:9: error: ‘par’ was not declared in this scope; did you mean ‘pa’?
   17 |         par[v]=pa;
      |         ^~~
      |         pa
answer.code:18:9: error: ‘dep’ was not declared in this scope
   18 |         dep[v]=~pa?dep[pa]+1:0;
      |         ^~~
answer.code:19:9: error: ‘sz’ was not declared in this scope
   19 |         sz[v]=vis[v]=1;
      |         ^~
answer.code:19:15: error: ‘vis’ was not declared in this scope
   19 |         sz[v]=vis[v]=1;
      |               ^~~
answer.code:20:19: error: ‘adj’ was not declared in this scope
   20 |         for(int u:adj[v]) if(u!=pa) {
      |                   ^~~
answer.code:22:16: error: ‘pt’ was not declared in this scope; did you mean ‘_t’?
   22 |             if(pt[v]==-1||sz[pt[v]]<sz[u])
      |                ^~
      |                _t
answer.code: In member function ‘void HLD::dfs2(int, int, int)’:
answer.code:30:9: error: ‘idx’ was not declared in this scope
   30 |         idx[v]=_t++,hd[v]=h;
      |         ^~~
answer.code:30:21: error: ‘hd’ was not declared in this scope; did you mean ‘h’?
   30 |         idx[v]=_t++,hd[v]=h;
      |                     ^~
      |                     h
answer.code:31:14: error: ‘pt’ was not declared in this scope; did you mean ‘_t’?
   31 |         dfs2(pt[v],v,h);
      |              ^~
      |              _t
answer.code:32:19: error: ‘adj’ was not declared in this scope
   32 |         for(int u:adj[v]) if(u!=pa&&u!=pt[v]) {
      |                   ^~~
answer.code: In member function ‘void HLD::modify(int, int)’:
answer.code:37:15: error: ‘hd’ was not declared in this scope
   37 |         while(hd[u]!=hd[v]) {
      |               ^~
answer.code:38:16: error: ‘dep’ was not declared in this scope
   38 |             if(dep[hd[u]]<dep[hd[v]])
      |                ^~~
answer.code:39:17: error: ‘swap’ was not declared in this scope
   39 |                 swap(u,v);
      |                 ^~~~
answer.code:41:15: error: ‘par’ was not declared in this scope
   41 |             u=par[hd[u]];
      |               ^~~
answer.code:43:12: error: ‘dep’ was not declared in this scope
   43 |         if(dep[u]<dep[v])
      |            ^~~
answer.code:44:13: error: ‘swap’ was not declared in this scope
   44 |             swap(u,v);
      |             ^~~~
answer.code: In member function ‘int HLD::query(int, int)’:
answer.code:49:15: error: ‘hd’ was not declared in this scope
   49 |         while(hd[u]!=hd[v]) {
      |               ^~
answer.code:50:16: error: ‘dep’ was not declared in this scope
   50 |             if(dep[hd[u]]<dep[hd[v]])
      |                ^~~
answer.code:51:17: error: ‘swap’ was not declared in this scope
   51 |                 swap(u,v);
      |                 ^~~~
answer.code:53:15: error: ‘par’ was not declared in this scope
   53 |             u=par[hd[u]];
      |               ^~~
answer.code:55:12: error: ‘dep’ was not declared in this scope
   55 |         if(dep[u]<dep[v])
      |            ^~~
answer.code:56:13: error: ‘swap’ was not declared in this scope
   56 |             swap(u,v);
      |             ^~~~