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Binary search ... is a search algorithm that finds the position of a target value within a sorted array. It compares the target value to the middle element of the array; if they are unequal, the half in which the target cannot lie is eliminated and the search continues on the remaining half until it is successful.

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This video starts with searching a name in a long contact list. It gives good intuition because that is how we look things up in a printed phone book or dictionary. We simulate binary search ourselves, without knowing its called binary search.

Another funky paragraph 5⁷ x_n mono

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[METRO] Siruseri Metro

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Corey's Party (AIO 2014)

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#include <iostream>
using namespace std;
int main() {
	/* ... your code here ... */
	return 0;
}

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\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)

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