/in/foo.cc: In function 'int main()':
/in/foo.cc:38:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while (q.size()>=a[i])
           ~~~~~~~~^~~~~~
/in/foo.cc:12:10: warning: unused variable 'j' [-Wunused-variable]
  int n,i,j,d1;
          ^
/in/foo.cc:12:12: warning: unused variable 'd1' [-Wunused-variable]
  int n,i,j,d1;
            ^~