문제
UCPC 초등학교의 즐거운 체육 시간이 찾아왔다. 오늘은 운동장 5ドル$바퀴 달리기 수행평가가 있는 날이다.
달리기를 평소에 별로 좋아하지 않던 우경이는 출발 전부터 걱정이 태산이었다. 그런 우경이를 보고 체육 선생님은 따스한 미소로 말했다. "괜찮아, 너무 부담 갖지 마. 천천히 뛰어도 괜찮으니까, 5ドル$바퀴를 1800ドル$초 이하의 시간에 완주하면 돼."
선생님의 다정한 응원 덕분에 용기를 얻은 우경이는 천천히 힘을 내어 달리기 시작했다. 조금 힘들었지만, 포기하지 않고 한 바퀴씩 꾸준히 달려 어느덧 4ドル$바퀴를 완주했다.
이제 마지막 1ドル$바퀴. 땀을 닦으며 잠시 숨을 고른 우경이는 문득 걱정이 들었다. "내가 너무 천천히 뛰었나...? 마지막 한 바퀴만 잘 뛰면 수행평가를 통과할 수 있을까?" 지친 상태라 마지막 바퀴는 분명 300ドル$초 이상 걸릴 것 같았지만, 우경이는 최선을 다해 딱 300ドル$초에 맞춰 달리기로 마음먹었다.
지금까지 우경이가 뛴 4ドル$바퀴의 시간이 초 단위로 각각 주어질 때, 마지막 한 바퀴를 정확히 300ドル$초에 뛴다면 수행평가를 무사히 통과할 수 있을지 계산해보자.
출력
우경이가 마지막 바퀴를 뛰어서 수행평가를 무사히 통과할 수 있으면 Yes, 불가능하면 No를 출력한다.
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