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[river20s] WEEK 02 #757
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[river20s] WEEK 02 #757
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import java.util.Arrays; | ||
/* | ||
풀이: | ||
- 문자열 s와 t를 배열로 저장하고, 오름차순으로 문자를 정렬한다. | ||
- 정렬된 두 배열이 동일하면 애너그램으로 판단한다. | ||
시간 복잡도: | ||
- O(n log n) | ||
- 배열 정렬은 O(n log n)의 시간 복잡도를 갖는다. | ||
공간 복잡도: | ||
- O(n) | ||
- 문자열을 배열로 변환하고 정렬할 때 O(n)의 공간 복잡도를 갖는다. | ||
*/ | ||
class Solution { | ||
public boolean isAnagram(String s, String t) { | ||
// 두 문자열의 길이가 다르면 false | ||
if (s.length() != t.length()) { | ||
return false; | ||
} | ||
//문자열의 문자를 배열로 저장한다 | ||
char[] sArray = s.toCharArray(); | ||
char[] tArray = t.toCharArray(); | ||
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// 각 배열의 문자를 오름차순으로 정렬한다 | ||
Arrays.sort(sArray); | ||
Arrays.sort(tArray); | ||
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// 정렬한 두 배열을 비교한다. | ||
return Arrays.equals(sArray, tArray); | ||
} | ||
} | ||
|
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사실 없어도 되는 if문이지만, 추가를 통해 효율을 조금이라도 더 올릴 수 있을것 같아요!