力扣682.棒球比赛

力扣682.棒球比赛

• 数组模拟栈记录分数

•   class Solution {public:int calPoints(vector<string>& ops) {int res=0;vector<int> points;for(auto &op:ops){int n = points.size();char c = op[0];if(c == '+'){res += points[n-1] + points[n-2];points.push_back(points[n-1]+points[n-2]);}else if(c == 'D'){res += points[n-1]*2;points.push_back(points[n-1]*2);}else if(c == 'C'){res -= points[n-1];points.pop_back();}else{res += stoi(op);points.push_back(stoi(op));}}return res;}};