2024每日刷题（186）

Leetcode—1279. 红绿灯路口

C++实现代码

class TrafficLight {
public:TrafficLight() {}void carArrived(int carId,                   // ID of the carint roadId,                  // ID of the road the car travels on. Can be 1 (road A) or 2 (road B)int direction,               // Direction of the carfunction<void()> turnGreen,  // Use turnGreen() to turn light to green on current roadfunction<void()> crossCar    // Use crossCar() to make car cross the intersection) {lock_guard<std::mutex> loc(mtx);if(roadId != curRoadId) {curRoadId = roadId;turnGreen();}crossCar();}
private:mutex mtx;int curRoadId = 1;
};

运行结果

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