A simple Python solution


  • 0
    L
    class Solution(object):
        def frequencySort(self, s):
            d, res = {}, ""
            for c in s:
                d[c] = d.get(c,0) + 1
            dl = sorted(d, key=d.get, reverse=True)
            for v in dl:
                res += (v * d[v]) 
            return res
    

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