BOJ
백준 파이썬 10828 스택
Coding_SJ
2020. 3. 26. 01:31
내 풀이
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import sys
class Stack:
def __init__(self):
self.len = 0
self.list = []
def push(self,x):
self.list.append(x)
self.len += 1
def pop(self):
if self.len == 0:
return -1
pop_result = self.list[self.len - 1]
del self.list[self.len - 1]
self.len -= 1
return pop_result
def size(self):
return self.len
def empty(self):
return 1 if self.len == 0 else 0
def top(self):
if self.len == 0:
return -1
else:
return self.list[self.len - 1]
n = int(sys.stdin.readline())
stack = Stack()
while n > 0:
n -= 1
a = sys.stdin.readline().split()
if a[0] == 'push':
stack.push(a[1])
elif a[0] == 'top':
print(stack.top())
elif a[0] == 'size':
print(stack.size())
elif a[0] == 'empty':
print(stack.empty())
elif a[0] == 'pop':
print(stack.pop())
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cs |