682 Baseball Game
682. Baseball Game
题目: https://leetcode.com/problems/Baseball-Game/
难度:
Easy
思路
points用来存放每一次的分数，最后求和。
class Solution(object):
def calPoints(self, ops):
"""
:type ops: List[str]
:rtype: int
"""
points = []
for i in ops:
if i == 'C':
points.pop()
elif i == 'D':
points.append(2 * points[-1])
elif i == '+':
points.append(points[-1] + points[-2])
else:
points.append(int(i))
return sum(points)
