/in/foo.cc:14:16: error: expected unqualified-id before '+' token
 int dist[maxN];+
                ^
/in/foo.cc: In function 'void spfa()':
/in/foo.cc:39:3: error: 'inq' was not declared in this scope
   inq[cur]=false;
   ^~~
/in/foo.cc:40:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<toNode[cur].size();i++)
               ~^~~~~~~~~~~~~~~~~~~