memcpy(testArr, arr, n * sizeof(int));
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Think about how you'd search a large room for a lost key. You wouldn't examine every square inch sequentially. You'd split the room into sections (by the couch, near the door, under the table) and rule out entire sections at a glance. "I didn't go near the kitchen, so skip that."
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Anxiety is growing over a potential war between Iran and the US in the Middle East, with embassies evacuating staff and airlines cancelling flights as tensions mount.