682. Baseball Game
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简单题
class Solution {public: int calPoints(vector<string>& ops) { vector<int> result(1000,0); int index = 0; for(int i = 0;i<ops.size();i++) { if(ops[i]=="+"){ result[index] = result[index-1] + result[index-2]; index++; } else if(ops[i]=="D"){ result[index] = result[index-1]*2; index++; } else if(ops[i]=="C") { index--; result[index] = 0; } else { result[index] = atoi(ops[i].c_str()); index++; } } int sum = 0; for(int i = 0;i<index;i++) sum+=result[i]; return sum; }};
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