不会写啊,这个东西对我来说,难度太大了

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def f(n):
    convertString = "01"
    if n < 2:
        return convertString[n]
    else:
        return f(n//2) + convertString[n%2]
if __name__ == '__main__':
    d=int(input())
    print(f(d))

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