task: Закрась все клетки коридора: пока слева стена — ты в коридоре. Коридор каждый раз разной длины.

+---+---+---+---+---+---+---+---+---+---+---+
|                                           |
+   +   +   +   +   +   +   +   +   +   +   +
|                                           |
+   +   +---+---+---+---+---+   +   +   +   +
|     >   .   .   .   .   .                 |
+   +   +---+---+---+---+---+   +   +   +   +
|                                           |
+   +   +   +   +   +   +   +   +   +   +   +
|                                           |
+---+---+---+---+---+---+---+---+---+---+---+

+---+---+---+---+---+---+---+---+---+---+---+---+
|                                               |
+   +---+---+---+---+---+---+---+---+---+   +   +
| >   .   .   .   .   .   .   .   .   .         |
+   +---+---+---+---+---+---+---+---+---+   +   +
|                                               |
+   +   +   +   +   +   +   +   +   +   +   +   +
|                                               |
+   +   +   +   +   +   +   +   +   +   +   +   +
|                                               |
+---+---+---+---+---+---+---+---+---+---+---+---+

+---+---+---+---+---+---+---+---+---+
|                                   |
+   +   +   +   +   +   +   +   +   +
|                                   |
+   +   +   +---+---+---+   +   +   +
|         >   .   .   .             |
+   +   +   +---+---+---+   +   +   +
|                                   |
+---+---+---+---+---+---+---+---+---+

+---+---+---+---+---+---+---+---+---+---+---+---+
|                                               |
+   +   +   +   +   +   +   +   +   +   +   +   +
|                                               |
+   +   +   +   +   +   +   +   +   +   +   +   +
|                                               |
+   +   +---+---+---+---+---+---+---+   +   +   +
|     >   .   .   .   .   .   .   .             |
+   +   +---+---+---+---+---+---+---+   +   +   +
|                                               |
+   +   +   +   +   +   +   +   +   +   +   +   +
|                                               |
+---+---+---+---+---+---+---+---+---+---+---+---+
