[Baekjoon/Python3] 10845번 큐

[Baekjoon/Python3] 10845번 큐

 

www.acmicpc.net/problem/10845

10845번: 큐

 

import sys
q = []
for i in range(int(sys.stdin.readline())):
    s = sys.stdin.readline().split()
    if s[0] == 'push':
        q.append(s[1])
    elif s[0] == 'pop':
        print(q.pop(0) if q else -1)
    elif s[0] == 'size':
        print(len(q))
    elif s[0] == 'empty':
        print(0 if q else 1)
    elif s[0] == 'front':
        print(q[0] if q else -1)
    elif s[0] == 'back':
        print(q[-1] if q else -1)