ran especially skilled computation mathematic it say unimaginable calculation work instantperfect Memento Strict SenseRan yakumo cute girl love create cute math problemslet fx minimal square number strictly great x gx maximal square number equal x for example f1f2g4g84A positive integer x cute xgxfxx for example 1511 cute integer 3815 Ran give array length n she wants find small nonnegative integer k a_i k cute number element