题解 | 参议院投票

#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 求出最终获胜帮派的名称
# @param s string字符串 
# @return string字符串
#
class Solution:
    def predictVictory(self , s: str) -> str:
        # write code here
        red_stack = []
        dark_stack = []

        for i,char in enumerate(s):
            if char == "R":
                red_stack.append(i)
            else:
                dark_stack.append(i)
        while red_stack and dark_stack:
            red_index = red_stack.pop(0)
            dark_index = dark_stack.pop(0)

            if red_index < dark_index:
                red_stack.append(red_index + len(s))
            else:
                dark_stack.append(dark_index + len(s))
        return "Red" if red_stack else "Dark"