[윤태권] Week5 문제 풀이 #444
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[윤태권] Week5 문제 풀이 #444
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taekwon-dev
commented
Sep 10, 2024
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| StringBuilder sb = new StringBuilder(); | ||
| for (int i = 0; i < 26; i++) { | ||
| sb.append("^").append(count[i]); |
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Note:
StringBuilder 에 appending 할 때 "^" 와 같이 구분자를 넣어야 하는 이유
- [2, 0, 1] -> "201"
- [20, 1] -> "201"
위와 같은 케이스가 발생함. 따라서 구분자를 넣어서 이와 같은 충돌 케이스를 방지함.
bky373
reviewed
Sep 12, 2024
Comment on lines
+1
to
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| /** | ||
| * 시간 복잡도: O(n) | ||
| * - 문제 조건 1 <= prices.length <= 10^5 를 보고, 우선 O(n^2)는 피해야겠다는 생각을 우선하게 됨. | ||
| * - 결국 이 문제는 각 인덱스가 날짜 개념으로 적용되기 때문에, 순차적으로 흘러감. (최대 이익을 계산할 때 결국 각 일자 별로 내가 얼마의 이득을 봤는지를 계산하고, 이 중 최댓값을 고르면 되는 구조) | ||
| * - 따라서 한 번의 순회로 문제를 풀 수 있음 | ||
| * 공간 복잡도: O(1) | ||
| */ |
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접근 방식을 잘 작성해주셔서 이해가 잘 되었습니다 👍
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