LeetCode 506 相對名次
class solution:
def findRelativeRanks(self, nums):
sorted_nums = sorted(nums)
rank = ['Gold Medal', 'Silver Medal', 'Bronze Medal']+[str(i) for i in range(4, len(nums)+1)]
return map(dict(zip(sorted_nums, rank)).get, nums)
zip 一一打包， dict建立字典，map將函式對指定序列做一一對映
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