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2015/day04/problem

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+                                           Advent of Code
+
+   br0xen 40*
+
+     • [About]
+     • [Stats]
+     • [Leaderboard]
+     • [Settings]
+     • [Log out]
+
+--- Day 4: The Ideal Stocking Stuffer ---
+
+   Santa needs help mining some AdventCoins (very similar to bitcoins) to use as gifts for all the
+   economically forward-thinking little girls and boys.
+
+   To do this, he needs to find MD5 hashes which, in hexadecimal, start with at least five zeroes.
+   The input to the MD5 hash is some secret key (your puzzle input, given below) followed by a
+   number in decimal. To mine AdventCoins, you must find Santa the lowest positive number (no
+   leading zeroes: 1, 2, 3, ...) that produces such a hash.
+
+   For example:
+
+     • If your secret key is abcdef, the answer is 609043, because the MD5 hash of abcdef609043
+       starts with five zeroes (000001dbbfa...), and it is the lowest such number to do so.
+     • If your secret key is pqrstuv, the lowest number it combines with to make an MD5 hash
+       starting with five zeroes is 1048970; that is, the MD5 hash of pqrstuv1048970 looks like
+       000006136ef....
+
+   Your puzzle answer was 282749.
+
+--- Part Two ---
+
+   Now find one that starts with six zeroes.
+
+   Your puzzle answer was 9962624.
+
+   Both parts of this puzzle are complete! They provide two gold stars: **
+
+   At this point, you should return to your advent calendar and try another puzzle.
+
+   Your puzzle input was yzbqklnj.
+
+   You can also [Shareon Twitter Google+ Reddit] this puzzle.
+
+References
+
+   Visible links
+   . http://adventofcode.com/
+   . http://adventofcode.com/about
+   . http://adventofcode.com/stats
+   . http://adventofcode.com/leaderboard
+   . http://adventofcode.com/settings
+   . http://adventofcode.com/auth/logout
+   . https://en.wikipedia.org/wiki/Bitcoin#Mining
+   . https://en.wikipedia.org/wiki/Bitcoin
+   . https://en.wikipedia.org/wiki/MD5
+   . https://en.wikipedia.org/wiki/Hexadecimal
+   . http://adventofcode.com/
+   . https://twitter.com/intent/tweet?text=I%27ve+completed+%22The+Ideal+Stocking+Stuffer%22+%2D+Day+4+%2D+Advent+of+Code&url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F4&related=ericwastl&hashtags=AdventOfCode
+   . https://plus.google.com/share?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F4
+   . http://www.reddit.com/submit?url=http%3A%2F%2Fadventofcode%2Ecom%2Fday%2F4&title=I%27ve+completed+%22The+Ideal+Stocking+Stuffer%22+%2D+Day+4+%2D+Advent+of+Code