add naive impl to refine it with binary search
add naive impl to refine it with binary search

AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes,AlgorithmLover/OJCodes