Дистанционный практикум по программированию

Consider a 3D scene with OXYZ coordinate system. Axis OX points to the right, axis OY points up, and axis OZ points away from you. There is a number of rectangular windows on the scene. The plane of each window is parallel to OXY , its sides are parallel to OX and OY . All windows are situated at different depths on the scene (different coordinates z > 0).

A gunman with a rifle moves along OX axis (y = 0 and z = 0). He can shoot a bullet in a straight line. His goal is to shoot a single bullet through all the windows. Just touching a window edge is enough. Your task is to determine how to make such shot.

Исходные данные

The first line of the input file contains a single integer number n (2 <= n <= 100) - the number of windows on the scene. The following n lines describe the windows. Each line contains five integer numbers x_1i, y_1i, x_2i, y_2i, z_i (0 < x_1i, y_1i, x_2i, y_2i, z_i < 1000). Here (x_1i, y_1i, z_i) are coordinates of the bottom left corner of the window, and (x_2i, y_2i, z_i) are coordinates of the top right corner of the window (x_1i < x_2i, y_1i < y_2i). Windows are ordered by z coordinate (z_i > z_i-1 for 2 <= i <= n).

Результат

Output a single word "UNSOLVABLE" if the gunman cannot reach the goal of shooting a bullet through all the windows.

Otherwise, on the first line output a word "SOLUTION". On the next line output x coordinate of the point from which the gunman must fire a bullet. On the following n lines output x, y, z coordinates of the points where the bullet goes through the consecutive windows. All coordinates in the output file must be printed with six digits after decimal point.

Примеры

3
1 3 5 5 3
1 2 5 7 5
5 2 7 6 6

SOLUTION
-1.000000
2.000000 3.000000 3.000000
4.000000 5.000000 5.000000
5.000000 6.000000 6.000000

3
2 1 5 4 1
3 5 6 8 2
4 3 8 6 4

UNSOLVABLE