[BOJ 19583] 백준 19583 싸이버개강총회

문제

https://www.acmicpc.net/problem/19583

19583번: 싸이버개강총회

풀이

 

 

python3

import sys

if __name__ == '__main__':
    S, E, Q = map(str, input().split())

    S = int("".join(S.split(':')))
    E = int("".join(E.split(':')))
    Q = int("".join(Q.split(':')))

    attendance = dict()
    while True:
        line = sys.stdin.readline()
        if len(line) < 5:
            break
        chat_time, name = map(str, line.split())

        chat_time = int("".join(chat_time.split(':')))

        if chat_time <= S:
            attendance[name] = 1
        elif E <= chat_time <= Q:
            if name in attendance:
                attendance[name] += 1


    result = 0
    for key, value in attendance.items():
        if value >= 2:
            result += 1

    print(result)

 

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