682. Baseball Game - LeetCode Solution

class Solution:
    def calPoints(self, ops: List[str]) -> int:
        stack = []
        for i in ops:
            if len(i) >= 2:
                stack.append(int(i))
                continue
            if i.isdigit():
                stack.append(int(i))
            elif i == "C":
                stack.pop()
            elif i == "D":
                stack.append(stack[-1] * 2)
            else:
                stack.append(stack[-1] + stack[-2])
        
        return sum(stack)