LeetCode 每日一题：682. 棒球比赛

682. 棒球比赛

模拟栈，so easy 对叭

class Solution {
public:
    int tt = 0;
    int s[1010] = {0};
    int calPoints(vector<string>& ops) {
        for (auto& c : ops) {
            if (c == "+") {
                s[tt + 1] = s[tt] + s[tt - 1];
                tt ++ ;
            }
            else if (c == "D") {
                s[tt + 1] = s[tt] * 2;
                tt ++ ;
            }
            else if (c == "C") {
                tt -- ;
            }
            else s[ ++ tt] = stoi(c);
        }
        int res = 0;
        for (int i = 1; i <= tt; i ++ ) {
            res += s[i];
        }
        return res;
    }
};