/in/foo.cc:25:39: error: invalid declarator before 'q'
 priority_queue<node,vector<node>,cmp> q;
                                       ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:38:3: error: 'q' was not declared in this scope
   q.push((node){j,s[j].wi});
   ^
/in/foo.cc:43:21: error: 'q' was not declared in this scope
   printf ("%d %d\n",q.top().wi,q.top().id);
                     ^