You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
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count = 0
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for i in range(10000): # Start from 100
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num_str = str(i).zfill(4) # fill with zeros
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if len(set(num_str)) == 3:
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count += 1
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print(f"Total numbers with three different digits: {count}")
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