2024每日刷题（179）

Leetcode—1114. 按序打印

C++实现代码

class Foo {
public:Foo() {firstMutex.lock();secondMutex.lock();}void first(function<void()> printFirst) {// printFirst() outputs "first". Do not change or remove this line.printFirst();firstMutex.unlock();}void second(function<void()> printSecond) {// printSecond() outputs "second". Do not change or remove this line.firstMutex.lock();printSecond();secondMutex.unlock();}void third(function<void()> printThird) {// printThird() outputs "third". Do not change or remove this line.secondMutex.lock();printThird();}
private:mutex firstMutex;mutex secondMutex;
};

运行结果

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