7
1 
0.0 0.0
0.5 1.0 2.0 4.0 5.0 10.0 15.0 20.0
0.0552 0.06 0.0682 0.0801 0.0843 0.0931 0.0912 0.0857

======================Description=====================
The first row is n.
The second row flag of boundary condition, 1 for s' and 2 for s".
The third row are the boundary condition, s'(x_0), s'(x_n) or s"(x_0), s"(x_n).
The fourth row are the mesh.
The fifth row are the values at mesh points.