Google Interview Question for SDE1s


Country: United States




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1. set current first on as the start car of the cluster.
2.find following car whose speed is smaller than start car, so all cars before this one are belong to previous cluster.
3.Repeat step #1 and #2 till the end.

I don't quite understand what follow-up is talking.

- lxfuhuo January 05, 2018 | Flag Reply
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static ArrayList<ArrayList<Integer>> makeClusters(int[] arr) {
        ArrayList<ArrayList<Integer>> answer = new ArrayList<>();
        if (arr == null || arr.length == 0) return answer;
        int length = arr.length;
        int ptr = 1, start = arr[0];
        ArrayList<Integer> temp = new ArrayList<>();
        temp.add(start);
        while (ptr < length) {
            int speed = arr[ptr];
            if (speed >= start) {
                temp.add(speed);            
            } else {
                answer.add(temp);
                temp = new ArrayList<Integer>();
                temp.add(speed);
                start = speed;
            }
            ptr++;
        }
        answer.add(temp);
        return answer;
    }

- 11.9.95.shubham January 10, 2018 | Flag Reply


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