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leetcode_python
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
你现在是棒球比赛记录员。
给定一个字符串列表,每个字符串可以是以下四种类型之一:
1.整数(一轮的得分):直接表示您在本轮中获得的积分数。
2. "+"(一轮的得分):表示本轮获得的得分是前两轮有效 回合得分的总和。
3. "D"(一轮的得分):表示本轮获得的得分是前一轮有效 回合得分的两倍。
4. "C"(一个操作,这不是一个回合的分数):表示您获得的最后一个有效 回合的分数是无效的,应该被移除。
每一轮的操作都是永久性的,可能会对前一轮和后一轮产生影响。
你需要返回你在所有回合中得分的总和。
示例 1:
输入: ["5","2","C","D","+"]
输出: 30
解释:
第1轮:你可以得到5分。总和是:5。
第2轮:你可以得到2分。总和是:7。
操作1:第2轮的数据无效。总和是:5。
第3轮:你可以得到10分(第2轮的数据已被删除)。总数是:15。
第4轮:你可以得到5 + 10 = 15分。总数是:30。
示例 2:
输入: ["5","-2","4","C","D","9","+","+"]
输出: 27
解释:
第1轮:你可以得到5分。总和是:5。
第2轮:你可以得到-2分。总数是:3。
第3轮:你可以得到4分。总和是:7。
操作1:第3轮的数据无效。总数是:3。
第4轮:你可以得到-4分(第三轮的数据已被删除)。总和是:-1。
第5轮:你可以得到9分。总数是:8。
第6轮:你可以得到-4 + 9 = 5分。总数是13。
第7轮:你可以得到9 + 5 = 14分。总数是27。
注意:
输入列表的大小将介于1和1000之间。
列表中的每个整数都将介于-30000和30000之间。
"""
class Solution(object):
def calPoints(self, ops):
"""
:type ops: List[str]
:rtype: int
"""
len_ops = len(ops)
ret_list = []
for n1 in range(0, len_ops):
if ops[n1] == "+":
score = ret_list[-1] + ret_list[-2]
ret_list.append(score)
elif ops[n1] == "D":
score = 2 * ret_list[-1]
ret_list.append(score)
elif ops[n1] == "C":
ret_list.pop()
else:
ret_list.append(int(ops[n1]))
return sum(ret_list)
if __name__ == '__main__':
test = ["5","2","C","D","+"]
print Solution().calPoints(test)
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