gistfile1.txt

def earliest_start_time(task: Int, solution: Solution): Int = {
    var current_earliest = 0

    solution.task_list.filter(p => p.task_id == task).foreach{p =>
      p.precedence_constraint.foreach{r =>
        solution.task_list.filter(y => y.task_id == r).foreach{t =>
          if (t.precedence_constraint.isEmpty == true) {
            if (t.empty_start_time == true){
              return 0
            }else{
              return t.start_time
            }
          }

          if (t.empty_start_time == true) {
       XXX    if (current_earliest < t.duration + earliest_start_time (t.task_id, solution)){
       XXX    current_earliest = t.duration + earliest_start_time (t.task_id, solution)
            }else{return current_earliest}
          }else{
            if (current_earliest < t.duration + t.start_time) {
            current_earliest = t.duration + t.start_time
            }else{return current_earliest}
          }
        }
      }
    }
    current_earliest
  }