static int truckTour(int[][] petrolpumps) {
        ArrayDeque<Integer> amount = new ArrayDeque<>(petrolpumps.length);//amount off given petrol
        ArrayDeque<Integer> dist = new ArrayDeque<>(petrolpumps.length);//distance between two pump
        /**
         * indexes off element order change in the same order(Same phase) in all times
         * ...so we can get the index off the start pump in any time
         */
        ArrayDeque<Integer> indexs = new ArrayDeque<>(petrolpumps.length);//index off pump
        fill(petrolpumps, amount, dist, indexs);
        int minIndex = dist.size();
        for (int i = 0; i < amount.size(); i++) {
            //remain petrol after consumption due to distance ..the remain may be consumpted in next distance
            int remainpetrol = 0;
            amount.add(amount.poll());
            dist.add(dist.poll());
            indexs.add(indexs.poll());
            Object a[] = amount.toArray();
            Object b[] = dist.toArray();
            boolean state = true;
            for (int j = 0; j < a.length && state; j++) {
                remainpetrol += (Integer) a[j] - (Integer) b[j];
                if (remainpetrol >= 0)
                    state = true;
                else
                    state = false;
            }
            if (state && indexs.peek() <= minIndex)
                minIndex = indexs.peek();

        }
        return minIndex;
    }

    private static void fill(int[][] p, ArrayDeque<Integer> amount, ArrayDeque<Integer> dist,
                             ArrayDeque<Integer> indexs) {
        for (int i = 0; i < p.length; i++) {
            indexs.add(i);
            amount.add(p[i][0]);
            dist.add(p[i][1]);
        }
    }