answer.code: In function ‘char Input::next_char()’:
answer.code:12:50: error: ‘stdin’ was not declared in this scope
   12 |                 len = (int)fread(buf, 1, BUF_SZ, stdin);
      |                                                  ^~~~~
answer.code:1:1: note: ‘stdin’ is defined in header ‘<cstdio>’; did you forget to ‘#include <cstdio>’?
  +++ |+#include <cstdio>
    1 | 
answer.code:12:28: error: ‘fread’ was not declared in this scope; did you mean ‘friend’?
   12 |                 len = (int)fread(buf, 1, BUF_SZ, stdin);
      |                            ^~~~~
      |                            friend
answer.code:13:36: error: ‘EOF’ was not declared in this scope
   13 |                 if (!len) { return EOF; }
      |                                    ^~~
answer.code:13:36: note: ‘EOF’ is defined in header ‘<cstdio>’; did you forget to ‘#include <cstdio>’?
answer.code: In function ‘int Input::read_int()’:
answer.code:22:17: error: ‘isdigit’ was not declared in this scope
   22 |         while (!isdigit(ch = next_char())) {
      |                 ^~~~~~~
answer.code:26:16: error: ‘isdigit’ was not declared in this scope
   26 |         while (isdigit(ch = next_char())) { x = x * 10 + (ch - '0'); }
      |                ^~~~~~~
answer.code: At global scope:
answer.code:31:8: error: ‘pair’ was not declared in this scope
   31 | vector<pair<int,int>>adj[N],events[N];
      |        ^~~~
answer.code:1:1: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
  +++ |+#include <utility>
    1 | 
answer.code:31:8: error: ‘pair’ was not declared in this scope
   31 | vector<pair<int,int>>adj[N],events[N];
      |        ^~~~
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:8: error: ‘pair’ was not declared in this scope
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:8: error: ‘pair’ was not declared in this scope
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:8: error: ‘pair’ was not declared in this scope
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:8: error: ‘pair’ was not declared in this scope
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:8: error: ‘pair’ was not declared in this scope
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:8: error: ‘pair’ was not declared in this scope
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:8: error: ‘pair’ was not declared in this scope
answer.code:31:8: note: ‘std::pair’ is defined in header ‘<utility>’; did you forget to ‘#include <utility>’?
answer.code:31:1: error: ‘vector’ does not name a type
   31 | vector<pair<int,int>>adj[N],events[N];
      | ^~~~~~
answer.code: In function ‘void dfs(int, int)’:
answer.code:36:65: error: ‘max’ was not declared in this scope; did you mean ‘mx’?
   36 |         for(int i=1;i<19;i++)p[u][i]=p[p[u][i-1]][i-1],mx[u][i]=max(mx[u][i-1],mx[p[u][i-1]][i-1]);
      |                                                                 ^~~
      |                                                                 mx
answer.code:37:23: error: ‘adj’ was not declared in this scope
   37 |         for(auto[v,e]:adj[u]){
      |                       ^~~
answer.code: In function ‘void update(int, int, int)’:
answer.code:44:26: error: ‘swap’ was not declared in this scope
   44 |         if(dep[v]<dep[u])swap(u,v);
      |                          ^~~~
answer.code:45:19: error: ‘__lg’ was not declared in this scope
   45 |         for(int i=__lg(dep[v]);i>=0;i--){
      |                   ^~~~
answer.code:47:30: error: ‘max’ was not declared in this scope; did you mean ‘mx’?
   47 |                         l[e]=max(l[e],mx[v][i]);
      |                              ^~~
      |                              mx
answer.code:48:34: error: ‘min’ was not declared in this scope; did you mean ‘mn’?
   48 |                         mn[v][i]=min(mn[v][i],r[e]);
      |                                  ^~~
      |                                  mn
answer.code:53:19: error: ‘__lg’ was not declared in this scope
   53 |         for(int i=__lg(dep[v]);i>=0;i--){
      |                   ^~~~
answer.code:55:39: error: ‘max’ was not declared in this scope; did you mean ‘mx’?
   55 |                         l[e]=max(l[e],max(mx[v][i],mx[u][i]));
      |                                       ^~~
      |                                       mx
answer.code:55:30: error: ‘max’ was not declared in this scope; did you mean ‘mx’?
   55 |                         l[e]=max(l[e],max(mx[v][i],...