92 lines
2.3 KiB
Markdown
92 lines
2.3 KiB
Markdown
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# No Time For Directions!
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**Hermes** is the Greek god of, amongst others, travel, trade, and athletes.
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Hermes has placed his hope in you.
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You're dropped to a random location near Mount Cyllene in Arcadia, widely considered the birthplace
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of Hermes. After years of training, **You** are now set out on a quest. You must steal a key from
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**Hecate**, hidden near Mount Cyllene.
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Unfortunately, "near", is as close as you know where you are. The instructions on the parchment
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Hermes gave begin from here, however, he never had the time to tell you how to follow them, or where
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they lead to.
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The document has different markings that appear to tell you which direction to travel in. They
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indicate a direction, (`N`, `S`, `E` or `W`), and the number of steps you must take to find the
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hiding location.
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The problem is, that there's over a 100 different directions, and there's no time following these
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directions one by one. It will take far too long! You take a moment and work out the final
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destination, so you can get more quickly. Given that you can only walk in the cardinal directions,
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what is the shortest path to the destination?
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### Example
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- Given the following input
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```
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N5
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E2
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S9
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W3
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```
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Instructs you to to travel `5` steps North, `2` steps East, `9` steps South,
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and `3` steps West. Simplifying it, means `4` steps South, and `1` step West,
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or `5` steps away.
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- Given the following input
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```
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N6
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E5
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N5
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W3
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N4
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S9
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E4
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S1
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W6
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E3
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```
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Leaves you `5` steps North, and `3` steps East, or `8` steps away.
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Each line will have **at least 2** characters of input, the first being the direction, and
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the second being the number of steps. The number of steps on each line will
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always be between 1 and 9, inclusive, steps.
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**How many steps away** is the key?
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{{ if eq .Part 2 }}
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**Congratulations! You got Part 1 correct. Your answer was `{{ .Answer1 }}`.**
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## Part 2
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After some more inspection of the instructions, you decipher the final clue. The final location of
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the steps lead you to a different location. However, the first location you visit **twice** is the
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location where the key is hidden.
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### Example
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Given the following input:
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```
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S7
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W9
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E4
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N4
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S3
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E5
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S1
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```
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The first location visit twice is `7` blocks away South.
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With these new instructions, to find the key, **how many steps away is the first location you visit
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twice?**
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{{ end }}
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