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#include <string> #include <vector> #include <sstream> #include <iostream> using namespace std; bool isVaildQuiz(string quiz) { stringstream ss(quiz); int x, y, z; char op, equal_sign; ss >> x >> op >> y >> equal_sign >> z; if (op == '+') { if ((x + y) == z) { return true; } else { return false; } } else if (op == '-') { if ((x - y) == z) { return true; } else { return false; } } return false; } vector<string> solution(vector<string> quiz) { vector<string> answer; for (string str : quiz) { if (isVaildQuiz(str)) { answer.push_back("O"); } else { answer.push_back("X"); } } return answer; }
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