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Advent of Code 2020: "Password Philosophy" - Day 2

Day 2, another challenge: fix a broken password database. In order to do that, the passwords which violate the policy must be identified.

Task 1: I get a string, consisting of 2 numbers, a letter, and a password string. Check how many passwords have count(letter) which is between number 1 and number 2.

Task 2: The numbers are positions in the password string (beginning by 1, not 0). Exactly one of the two letters in the string must match the letter.

 

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