Lights Out

打开所有的灯关闭这个逻辑的益智游戏！

The game consists of a x by x grid of lights (x could be 3, 5, or 7); when the game starts, a set of these lights are switched on. Pressing one of the lights will toggle it and the four lights adjacent to it on and off. The aim of the game is to switch all the lights off.

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