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gitseoyeon
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May 13, 2026
| break; | ||
| } | ||
| String str = s.substring(i, i+2); | ||
| if(map.containsKey(str)) { |
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따로 연산하지 않고 미리 map에 값을 저장해두니까 간단하게 판별할 수 있어서 좋은거같습니다!
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