1,14929,./../solution/prefix_sum/14929 1,2167,./../solution/prefix_sum/2167 ,20116, ,11659, ,11441, ,17390, ,16139, 1,20438,./../solution/prefix_sum/20438 ,17123, 1,11660,./../solution/prefix_sum/11660 ,16507, ,19951, ,10427, 1,2015,./../solution/prefix_sum/2015 ,10713, ,20002, ,20159, ,18866, 1,10986,./../solution/prefix_sum/10986 ,5549, ,2571, 1,1749,./../solution/prefix_sum/1749 1,20440,./../solution/prefix_sum/20440 ,3673, ,5875, ,14476, ,19566, ,16971,./../solution/prefix_sum/16971 ,2900, 1,20543,./../solution/prefix_sum/20543 1,21318,./../solution/prefix_sum/21318 1,21757,./../solution/prefix_sum/21757