2. Algorithms for Searching Sequences: A space ship from another galaxy lands on earth containing a strange computing device on board with the following behavior: whenever the input to the device is a sequence.of n real numbers S, and an integer k, the black box answers “YES” or “NO” indicating whether the sequence S contains a subsequence of numbers whose sum is exactly k. We know nothing else about the workings of the computing device. Design an algorithm that
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