оставить эту - 2
1-1 = 0 1-2 = 0 1-3 = 0 1-4 = 1 2-1 = 0 2-2 = 0 2-3 = 0 2-4 = 0 3-1 = 0 3-2= 1 3-3 = 0 4-1 = 0 4-2 = 1 4-3 = 1 4-4 = 3
