Coding Games and Programming Challenges to Code Better
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Created by @CriusMaximus,validated by @Sflubaduba,@LeifTerry and @Naglfae.
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Maybe you should have written somewhere that the chain reaction does not wrap around, ie that the grid is not a torus.
The usual convention is that a grid is non-toroidal. On CodinGame, there are many puzzle statements that use a non-toroidal grid, but most of them don’t explicitly state that the grid (or a rule based on the grid) doesn’t wrap around.
impressive success rate… 
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