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91 lines
1.8 KiB
Markdown
91 lines
1.8 KiB
Markdown
---
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id: 6a22d77ddf034bc4e35b1d57
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title: "Challenge 350: Letter Distance"
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challengeType: 29
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dashedName: challenge-350
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---
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# --description--
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Given two strings of equal length, return the sum of the shortest distances between each pair of characters.
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- The input will only contain lowercase letters
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- The alphabet is treated as a circle, so the distance between `a` and `z` is 1.
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# --hints--
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`letter_distance("abc", "bcd")` should return `3`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(letter_distance("abc", "bcd"), 3)`)
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}})
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```
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`letter_distance("abc", "xyz")` should return `9`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(letter_distance("abc", "xyz"), 9)`)
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}})
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```
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`letter_distance("encrypt", "decrypt")` should return `10`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(letter_distance("encrypt", "decrypt"), 10)`)
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}})
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```
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`letter_distance("algorithm", "codeblock")` should return `43`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(letter_distance("algorithm", "codeblock"), 43)`)
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}})
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```
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`letter_distance("lobster", "penguin")` should return `47`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(letter_distance("lobster", "penguin"), 47)`)
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}})
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```
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`letter_distance("alligator", "crocodile")` should return `55`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(letter_distance("alligator", "crocodile"), 55)`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def letter_distance(str1, str2):
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return str1
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```
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# --solutions--
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```py
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def letter_distance(str1, str2):
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total = 0
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for a, b in zip(str1, str2):
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diff = abs(ord(a) - ord(b))
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total += min(diff, 26 - diff)
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return total
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```
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