#include <thread>
#include <mutex>
#include <vector>
#include <unistd.h>
#include <stdio.h>
#include <utility>
using namespace std;

void chel(int me, int total, mutex *sticks, mutex *sup) {
  int left = (me + total - 1) % total;
  int right =  me % total;
  if (left > right) swap(left,right);
  printf("[%d]: try lock %d\n", me, left);
  sticks[left].lock();
  printf("[%d]: try lock %d\n", me, right);
  usleep(1000);
  sticks[right].lock();
  printf("[%d]: eating\n", me);
  usleep(1000000);
  sticks[right].unlock();
  sticks[left].unlock();
  printf("[%d]: sleeping...\n", me);
}

int main(int argc, char **argv) {
  const int THREADS = argc > 1 ? stoi(argv[1]) : 5;
  vector<mutex> mutexes(THREADS);
  vector<thread> threads(THREADS);
  mutex super;
  for (int i = 0; i < THREADS; i++) {
    threads[i] = thread(chel, i, THREADS, &mutexes[0], &super);
  } 
  for (int i = 0; i < THREADS; i++) {
    threads[i].join();
  }
  printf("Thats all!!!!!!!\n");
}