text: #ifdef CS333_P3P4
  #include "types.h"
  #include "user.h"
  
  int
  main(int argc, char *argv[])
  {
    if(argc < 3 || argc > 3)
    {
      printf(1, "Invalid arguments\n setpriority [pid] [priority]\n");
    }
    else
    {
      int pid = atoi(argv[1]);
      int priority = atoi(argv[2]);
      int rc = setpriority(pid,priority);
      if(rc){
        printf(1,"setpriority failed\n");
      }
    }
      exit();
  }
  
  #endif
  