406_根据身高重建队列_数组_中等

 

 

 

我的思路是先看前面的比自己高的人个数进行排序，人个数相等下肯定个子小的在前面，依次类推。

 public int[][] reconstructQueue(int[][] people) {
        int index = 0;  //表示已经排好的人数
        int[][] queue = new int[people.length][2];
        int flag[] = new int[people.length];
        while (true) {
            if (index == 0) {
                int min = Integer.MAX_VALUE;
                int place = 0;
                for (int i = 0; i < queue.length; i++) {
                    if (people[i][1] == 0 && people[i][0] < min) {
                        queue[0][0] = people[i][0];
                        queue[0][1] = people[i][1];
                        place = i;
                        min = people[i][0];
                    }
                }
                flag[place] = 1;
                index++;
            } else {
                int place = 0;
                int min = Integer.MAX_VALUE; //获取满足条件的身高最小值
                for (int i = 0; i < people.length; i++) {
                    if (flag[i] == 0 && min > people[i][0]) {
                        int num = 0;//比我高的
                        for (int j = 0; j < index; j++) {
                            if (queue[j][0] >= people[i][0]) {
                                num++;
                                if (num > people[i][1]) break;
                            }
                        }
                        if (num == people[i][1]) {
                            queue[index][0] = people[i][0];
                            queue[index][1] = people[i][1];
                            place = i;
                            min = people[i][0];
                        }

                    }
                }
                flag[place] = 1;
                index++;
            }
            if (index >= people.length) break;
        }
        //        for (int i = 0; i < queue.length; i++) {
//
//            System.out.print(queue[i][0]);
//            System.out.print(" ");
//            System.out.println(queue[i][1]);
//
//        }
        return queue;
    }

 

官网的思路大致相同先是对身高进行排序，认为身高越高的在前面的可能性更大，身高相同则比自己高的个数多的再后，之后进行判断排序，比自己高的数量相等下个子低会插到前面，注意二维数组的排序方法。

 

 

    public int[][] reconstructQueue1(int[][] people){
        Arrays.sort(people, new Comparator<int[]>() {
            @Override
            public int compare(int[] o1, int[] o2) {
                if(o1[0] != o2[0]){
                    return o2[0] - o1[0];
                }else{
                    return o1[1] - o2[1];
                }
            }
        });

        ArrayList<int []> list = new ArrayList<>();
        for (int i = 0; i < people.length; i++) {
            if(list.size()==people[i][1]){
                list.add(people[i]);
            }else{
                list.add(people[i][1],people[i]);
            }
        }
        int [][] Array = new int[people.length][2];
        for (int i = 0; i < people.length; i++) {
            Array[i] = list.get(i);
        }
        return Array;
    }