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 Lights Out! (2) (Posted on 2022-10-31)
Imagine there is a 7x7 grid of lights, and only the middle in the grid is on.

The lights are wired such that when you flip the switch for one light (from on to off or off to on) the others next to it (not diagonally) flip as well.

Using this weird wiring of lights, what is the fewest number of switch changes it takes to turn all the lights off, and which lights should you switch?

Note: Assume all the switches work in the manner explained, and there is one switch for each of the lights.

 See The Solution Submitted by K Sengupta Rating: 5.0000 (1 votes)

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 Subject Author Date re: 网课代考 K Sengupta 2024-05-21 09:05:27 网课代考 meeloun education 2024-05-21 01:29:20 No Subject K Sengupta 2023-05-15 12:22:55 No Subject K Sengupta 2023-05-15 12:22:53 re: No Subject Usytdm 2023-05-15 04:28:52 re: comment Bastui 2023-05-15 04:25:07 re: further extension... Loasm 2023-05-15 04:20:20 re: continuing the fun Kisydua 2023-05-15 04:12:46 continuing the fun - edited Steven Lord 2022-11-18 19:33:47 continuing the fun Steven Lord 2022-11-18 06:02:45 further extension... Steven Lord 2022-11-16 02:58:12 re(2): Cleaned-up code for the extension and an observation Charlie 2022-11-14 14:18:01 re: Cleaned-up code for the extension and an observation Brian Smith 2022-11-14 12:06:27 Cleaned-up code for the extension and an observation Charlie 2022-11-13 11:32:26 Faster Method -- here's 17 and 19 Charlie 2022-11-11 22:01:34 comment Steven Lord 2022-11-11 15:29:47 re(4): extension of the problem -- 13 and 15 Charlie 2022-11-11 14:02:56 re(3): extension of the problem Charlie 2022-11-11 12:41:43 re(2): extension of the problem Steven Lord 2022-11-11 10:45:13 re: extension of the problem Brian Smith 2022-11-11 10:37:12 extension of the problem Steven Lord 2022-11-11 04:34:13 No Subject K Sengupta 2022-11-05 04:51:36 No Subject boxnovel 2022-11-05 03:40:55 computer solution Charlie 2022-10-31 10:31:43

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