1450120047708409867

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algopuzzles
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2021-10-18T15:22:15.000Z
On an nxn grid a few nodes are set on fire at t=0. The fire spreads like this: if at least two neighboring nodes of node x are lit, then node x will also catch fire in the next time step. What's the minimum number of nodes that have to be lit to burn the entire grid? #exportoberScreenshot