/in/foo.cc: In function 'void link(int, int, ll)':
/in/foo.cc:31:29: error: expected primary-expression before '/' token
 void link(int u,int v,ll w){/
                             ^
/in/foo.cc: In function 'int check(ll)':
/in/foo.cc:99:23: error: expected primary-expression before '/' token
  for(i=1;i<=pcnt;i++){/
                       ^
/in/foo.cc:100:3: error: expected primary-expression before 'if'
   if(vis[aim[i].id]) pc--;
   ^~