#include <iostream>
#include <thread>
#include <mutex>

std::recursive_mutex my_mutex;

void recursive_function(int n) {
std::lock_guard<std::recursive_mutex> lock(my_mutex);
std::cout << "Thread " << n << " has acquired the lock." << std::endl;

if (n > 0) {
recursive_function(n-1);
}

std::cout << "Thread " << n << " is releasing the lock." << std::endl;
}

int main() {
std::thread t1(recursive_function, 3);
std::thread t2(recursive_function, 2);

t1.join();
t2.join();

return 0;
}