Algorithm/10828.py at main · student079/Algorithm · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
import sys

item = int(sys.stdin.readline())


def push(x, lst):
    lst.append(x)


def pop(lst):
    if len(lst) == 0:
        return -1
    else:
        idx = len(lst)-1
        num = lst[idx]
        del lst[idx]
        return num


def size(lst):
    return len(lst)


def empty(lst):
    if len(lst) == 0:
        return 1
    else:
        return 0


def top(lst):
    if len(lst) == 0:
        return -1
    else:
        return lst[len(lst)-1]


lst = []

for _ in range(item):
    com = sys.stdin.readline().strip("\n")
    if "push" in com:
        push(int(com[5:]), lst)
    elif com == "pop":
        print(pop(lst))
    elif com == "size":
        print(size(lst))
    elif com == "empty":
        print(empty(lst))
    elif com == "top":
        print(top(lst))