This is should be the shortest version of your code
def sum_exists(ns, t): return bool({t - n for n in ns} & set(ns))
I've just realised that my algorithm is wrong, it would fail for something like 10 and [5]. Guess I need to put a bit more thought in my comments.
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This is should be the shortest version of your code
I've just realised that my algorithm is wrong, it would fail for something like 10 and [5]. Guess I need to put a bit more thought in my comments.