planks = 10;
plank_width = [3, 11, 11, 4, 2, 7, 7, 6, 8, 8];
pillars = 10;
pillar_height = [1, 3, 4, 3, 4, 3, 3, 1, 2, 1];
pillar_width = [1, 1, 2, 1, 2, 1, 1, 2, 2, 2];
available_width= 20;
available_height= 10;