[LeetCode] 506. Relative Ranks

轉自LeetCode

Given scores of N athletes, find their relative ranks and the people with the top three highest scores, who will be awarded medals: "Gold Medal", "Silver Medal" and "Bronze Medal".

Example 1:

Input: [5, 4, 3, 2, 1]
Output: ["Gold Medal", "Silver Medal", "Bronze Medal", "4", "5"]
Explanation: The first three athletes got the top three highest scores, so they got "Gold Medal", "Silver Medal" and "Bronze Medal". 
For the left two athletes, you just need to output their relative ranks according to their scores.

Note:

1. N is a positive integer and won't exceed 10,000.
2. All the scores of athletes are guaranteed to be unique.

<Solution>

想法如下

• 因為題目有說，分數不會重複，所以先用 hash map 將分數和位置的對照關係存起來

• 按照分數排序

• 根據排序後的結果，以及第一個步驟存的位置對照關係，填入相對應的答案

code 如下

C++

Java