answer.code:116:14: error: ‘int link [600114]’ redeclared as different kind of entity
  116 | int link[maxn];
      |              ^
In file included from /usr/include/x86_64-linux-gnu/bits/sigstksz.h:24,
                 from /usr/include/signal.h:328,
                 from /usr/include/c++/14/csignal:42,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:116,
                 from answer.code:1:
/usr/include/unistd.h:819:12: note: previous declaration ‘int link(const char*, const char*)’
  819 | extern int link (const char *__from, const char *__to)
      |            ^~~~
answer.code: In function ‘int main()’:
answer.code:136:21: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  136 |             link[tot]=lst;
      |                     ^
answer.code:136:22: error: assignment of read-only location ‘*(link + ((sizetype)tot))’
  136 |             link[tot]=lst;
      |             ~~~~~~~~~^~~~
answer.code:147:29: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  147 |             int w=del(link[x],x);
      |                             ^
answer.code:147:29: error: invalid conversion from ‘int (*)(const char*, const char*) noexcept’ to ‘int’ [-fpermissive]
  147 |             int w=del(link[x],x);
      |                       ~~~~~~^
      |                             |
      |                             int (*)(const char*, const char*) noexcept
answer.code:90:13: note:   initializing argument 1 of ‘int del(int, int)’
   90 | int del(int u,int v){
      |         ~~~~^
answer.code:150:19: warning: pointer to a function used in arithmetic [-Wpointer-arith]
  150 |             link[x]=y;
      |                   ^
answer.code:150:20: error: assignment of read-only location ‘*(link + ((sizetype)x))’
  150 |             link[x]=y;
      |             ~~~~~~~^~