On the coordinate plane there is a square with sides parallel to the coordinate axes. The length of the square side is equal to a . The lower left corner of the square coincides with the point ( 0, 0 ) (the point of the origin). The upper right corner of the square has positive coordinates. You are given a point with coordinates ( x , y ). Your task is to determine whether this point is located strictly inside the square, on its side, or strictly outside the square. The first line contains three integers a , x and y ( 1 ≤ a ≤ 1000 , - 1000 ≤ x , y ≤ 1000 ) — the length of the square side and the coordinates of the point which should be checked. Print one integer: 0, if the point is located strictly inside the square; 1, if the point is located on the side of the square; 2, if the point is located strictly outside the square.