[코테연습] Combination Sum III

leetcode.com/problems/combination-sum-iii/submissions/

Combination Sum III - LeetCode

Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and each combination should be a unique set of numbers.

Note:

• All numbers will be positive integers.
• The solution set must not contain duplicate combinations.

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조합으로 풀었다... 사실 시간초과나거나 그럴줄 알고 순열조합은 안쓰려고했는데 1~9라는 숫자라서 혹시나 해서 했더니 통과되서 당황..