King move. Chess king moves horizontally, vertically or diagonally to any adjacent cell. Given two different cells of the chessboard, determine whether a king can go from the first cell to the second in one move.
The program receives the input of four numbers from 1 to 8, each specifying the column and row number, first two – for the first cell, and then the last two – for the second cell. The program should output YES if a king can go from the first cell to the second in one move, or NO otherwise.
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Input |
Output |
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4 |
YES |
|
4 |
YES |
|
4 |
YES |