APS
9-1
https://leetcode.com/problems/sum-of-digits-of-string-after-convert/
https://leetcode.com/problems/last-stone-weight/
https://leetcode.com/problems/maximum-number-of-balloons/
https://leetcode.com/problems/find-lucky-integer-in-an-array/
https://leetcode.com/problems/distribute-candies-to-people/
9-2
https://leetcode.com/problems/string-matching-in-an-array/
https://leetcode.com/problems/crawler-log-folder/
https://leetcode.com/problems/three-consecutive-odds/
https://leetcode.com/problems/special-positions-in-a-binary-matrix/
9-3
https://leetcode.com/problems/maximum-ascending-subarray-sum/
https://leetcode.com/problems/calculate-money-in-leetcode-bank/
https://leetcode.com/problems/check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence/
https://leetcode.com/problems/mean-of-array-after-removing-some-elements/
https://leetcode.com/problems/uncommon-words-from-two-sentences/
https://leetcode.com/problems/number-complement/
https://leetcode.com/problems/count-square-sum-triples/
https://leetcode.com/problems/minimum-value-to-get-positive-step-by-step-sum/
자료구조
https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/
https://leetcode.com/problems/leaf-similar-trees/
https://leetcode.com/problems/design-hashmap/
https://leetcode.com/problems/design-hashset/
