using System.Collections.Generic;

public class Sequence : Node
{
    private List<Node> nodes = new List<Node>();

    public Sequence(List<Node> nodes)
    {
        this.nodes = nodes;
    }

    public override NodeState Evaluate()
    {
        var isAnyChildRunning = false;
        foreach (var node in nodes)
        {
            switch (node.Evaluate())
            {
                case NodeState.Failure:
                    state = NodeState.Failure;
                    return state;
                case NodeState.Success:
                    continue;
                case NodeState.Running:
                    isAnyChildRunning = true;
                    continue;
            }
        }
        state = isAnyChildRunning ? NodeState.Running : NodeState.Success;
        return state;
    }
}
public class TaskNode : Node
{
    public delegate NodeState TaskDelegate();
    private TaskDelegate action;

    public TaskNode(TaskDelegate action)
    {
        this.action = action;
    }
    
    public override NodeState Evaluate()
    {
        return action();
    }
}