[프로그래머스] 다리를 지나는 트럭

import java.util.LinkedList;
import java.util.Queue;

class Solution {
    public int solution(int bridge_length, int weight, int[] truck_weights) {
        int time = 0;
        int sum = 0;
        Queue<Integer> bridge = new LinkedList<Integer>();
        Queue<Integer> wait = new LinkedList<Integer>();

        for (int w : truck_weights) {
            wait.offer(w);
        }

        for (int i = 0; i < bridge_length; i++) {
            bridge.offer(0);
        }

        while (true) {
            time++;

            sum -= bridge.poll();

            if (!wait.isEmpty() && sum + wait.peek() <= weight) {
                bridge.offer(wait.peek());
                sum += wait.peek();
                wait.poll();
            }
            else {
                bridge.offer(0);
            }

            if (sum == 0) break;
        }
        return time;
    }
}