백준: 17863번 FYI (Python3)

백준: 17863번 FYI (Python3) FYI 성공다국어 시간 제한메모리 제한제출정답맞힌 사람정답 비율 1 초 512 MB 1628 1308 1225 80.275% 문제 In the United States of America, telephone numbers within an area code consist of 7 digits: the prefix number is the first 3 digits and the line number is the last 4 digits. Traditionally, the 555 prefix number has been used to provide directory information and assistance as in the following example.....