/* Check cf5-opt.vim defs.
VIM: let g:lcppflags="-std=c++11 -O2 -pthread"
VIM: let g:wcppflags="/O2 /EHsc /DWIN32"
*/
#include <iostream>

/*
Lattice paths
Problem 15

Starting in the top left corner of a 2x2 grid, and only being able to move to the right and down, there are exactly 6 routes to the bottom right corner.
__   _    _       
  |   |_   |   |   |_    |__ 
  |     |  |_  |__   |_     |

How many such routes are there through a 20x20 grid?

Solution:
*/

int main ( void )
{

	return 0;
}