/in/foo.cc: In function 'int main()':
/in/foo.cc:141:38: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null]
  141 |                 *link[maxN] = { NULL };
      |                                      ^
/in/foo.cc:141:27: warning: array subscript 100010 is above array bounds of 'edgenode* [100010]' [-Warray-bounds]
  141 |                 *link[maxN] = { NULL };
      |                  ~~~~~~~~~^
/in/foo.cc:40:29: note: while referencing 'link'
   40 | }edge[maxM], * pe = edge, * link[maxN], * pre[maxN], * cur[maxN];
      |                             ^~~~