Method compare

NetworkDelayTime.java:5–7

(int p1[], int p2[])

        // pair -> (node, time)
        PriorityQueue<int[]> pq = new PriorityQueue<>(new Comparator<int[]>(){
            public int compare(int p1[], int p2[]){
                return p1[1] - p2[1];
            }
        });
        int time[] = new int[n];
        Arrays.fill(time,Integer.MAX_VALUE);