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BOJ 16472 about fastcampus HOT 3 CLOSED

rhs0266 avatar rhs0266 commented on July 17, 2024
BOJ 16472

from fastcampus.

Comments (3)

java-saeng avatar java-saeng commented on July 17, 2024 1
while(e+1<ch.length && cnt < N){
                possible[ch[++e] - 'a']++;
                if(possible[ch[e] - 'a'] == 1){
                    cnt++;
                }
                //N이 cnt와 같은 순간에 끝냄
            }

찾았습니다.. 감사합니다..

선생님 그렇다면 제가 위에 올린 코드는 알파벳의 개수를 저장할 때,
알파벳의 개수가 0일 때만 더해서 틀린 것이지요?

from fastcampus.

rhs0266 avatar rhs0266 commented on July 17, 2024

반례는 잘 안 떠오르는데, 틀린 부분은 찾았습니다.

            while(e+1<ch.length && cnt < N){
                if(possible[ch[++e] - 'a'] == 0){
                    cnt++;
                    possible[ch[e] - 'a']++;
                }
                //N이 cnt와 같은 순간에 끝냄

            }

이 부분을 중요하게 보시면 좋을 것 같습니다.

from fastcampus.

rhs0266 avatar rhs0266 commented on July 17, 2024

네 맞습니다!

from fastcampus.

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