/in/foo.cc: In function 'int main()':
/in/foo.cc:63:13: error: 'q' was not declared in this scope
   for(int j=q[i];j;j=nxtq[j])
             ^
/in/foo.cc:65:4: error: 'l' was not declared in this scope
    l=lower_bound(dis+1,dis+v+1,L[j])-dis;
    ^
/in/foo.cc:66:4: error: 'r' was not declared in this scope
    r=lower_bound(dis+1,dis+v+1,R[j])-dis;
    ^