Lyft Level 5 Challenge 2018 - Final Round (Open Div. 2) A. The King's Race
http://codeforces.com/contest/1075/problem/A
On a chessboard with a width of nn and a height of nn, rows are numbered from bottom to top from 11 to nn, columns are numbered from left to right from 11 to nn. Therefore, for each cell of the chessboard, you can assign the coordinates
The white king has been sitting in a cell with (1,1)(1,1) coordinates for a thousand years, while the black king has been sitting in a cell with (n,n)(n,n) coordinates. They would have sat like that further, but suddenly a beautiful coin fell on the cell with coordinates