Baseball Game

class Solution {
public:
    int calPoints(vector<string>& ops) {
        int temp = 0;
        stack<int> record;
        for(int i=0;i<ops.size();i++){
            if(ops[i] == "C"){
                record.pop();
            }
            else if(ops[i] == "D"){
                record.push(2*record.top());
            }
            else if(ops[i] == "+"){
                temp = record.top();
                record.pop();
                int val = temp + record.top();
                record.push(temp);
                record.push(val);
            }
            else{
                record.push(stoi(ops[i]));
            }
        }
        int sum =0;
        while(!record.empty()){
            sum += record.top();
            record.pop();
        }
        return sum;
    }
};