answer.code: In function ‘void send_message(std::vector<bool>, std::vector<bool>)’:
answer.code:60:25: error: ‘sendd’ was not declared in this scope
   60 |                         sendd[i][j]=0;
      |                         ^~~~~
answer.code: In function ‘std::vector<int> dfs(int)’:
answer.code:78:12: error: ‘val’ was not declared in this scope
   78 |         if(val[u]>=2)
      |            ^~~
answer.code:81:12: error: ‘val’ was not declared in this scope
   81 |         if(val[u]++)
      |            ^~~
answer.code:83:29: error: ‘nxt’ was not declared in this scope
   83 |         vector<int> tmp=dfs(nxt[u]);
      |                             ^~~
answer.code: In function ‘std::vector<bool> receive_message(std::vector<std::vector<bool> >)’:
answer.code:131:28: error: ‘tmp’ was not declared in this scope; did you mean ‘tm’?
  131 |                         if(tmp.size()==16){
      |                            ^~~
      |                            tm