Grokking the Coding Interview: Patterns for Coding Questions
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Pavlo Iuriichuk

Pavlo Iuriichuk

· a month ago

Much easier (basically counter is a multi-set in this case):

from collections import Counter

class Solution:
    def calculateSteps(self, s: str, t: str) -> int:
        freq_s = Counter(s)
        freq_t = Counter(t)
        return sum((freq_s - freq_t).values())