# 506. Relative Ranks (很有趣的 Arrays.Sort)

`Input: [5, 4, 3, 2, 1]Output: ["Gold Medal", "Silver Medal", "Bronze Medal", "4", "5"]`

`public String[] findRelativeRanks(int[] nums) {        Integer[] index = new Integer[nums.length];                for (int i = 0; i < nums.length; i++) {            index[i] = i;        }                Arrays.sort(index, (a, b) -> (nums[b] - nums[a]));                String[] result = new String[nums.length];`
`for (int i = 0; i < nums.length; i++) {            if (i == 0) {                result[index[i]] = "Gold Medal";            }            else if (i == 1) {                result[index[i]] = "Silver Medal";            }            else if (i == 2) {                result[index[i]] = "Bronze Medal";            }            else {                result[index[i]] = (i + 1) + "";            }        }`
`return result;    }`

Arrays.sort(index, (a, b) -> (nums[b] — nums[a]));這個很有趣的方法!!

``int[][] pair = new int[nums.length][2];                for (int i = 0; i < nums.length; i++) {            pair[i][0] = nums[i];            pair[i][1] = i;        }                Arrays.sort(pair, (a, b) -> (b[0] - a[0]));總之他就是想要用下面這種感覺``
``Example:nums[i]    : [10, 3, 8, 9, 4]pair[i][0] : [10, 3, 8, 9, 4]pair[i][1] : [ 0, 1, 2, 3, 4]After sort:pair[i][0] : [10, 9, 8, 4, 3]pair[i][1] : [ 0, 3, 2, 4, 1]``
One clap, two clap, three clap, forty?

By clapping more or less, you can signal to us which stories really stand out.