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🅰 설계
1. 도시 간 관계
도시 간 관계는 양방향이 아니라 단방향 관계이다
2. 전체 도시 탐방
주어진 최소 거리만큼 떨어진 도시가 있는지 확인
3. 결과 도출
isThere
: 주어진 최소거리만큼 떨어진 도시가 있다면 true가 되는 변수isThere이 true가 아니면 주어진 최소거리만큼 떨어진 도시가 없다는 것으로 -1을 출력한다. 그 반대이면 주어진 최소거리만큼 떨어진 도시를 StringBuilder에 추가한다.
✅ 후기