isSorted(testArr, n) ? "✓" : "✗");
US space agency Nasa will fast-track plans to build a nuclear reactor on the Moon by 2030, according to US media.
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The algorithm also visits children in order of distance to the query point. This means it checks the most promising quadrants first, which tends to find a good candidate early and enables aggressive pruning of the remaining quadrants. Without this ordering, the algorithm would still produce the correct result, but it would prune fewer nodes.
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