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119 lines
2.4 KiB
Markdown
119 lines
2.4 KiB
Markdown
---
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id: 6a151d32d772271dd2448c2d
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title: "Challenge 311: Spellcaster"
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challengeType: 29
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dashedName: challenge-311
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---
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# --description--
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Given a string of spell codes you are casting, calculate the total score.
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Each character in the string represents a spell:
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| Code | Spell| Category | Base Score |
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| - | - | - | - |
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| `"f"` | Fire | Destruction | 3 |
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| `"l"` | Lightning | Destruction | 3 |
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| `"i"` | Ice | Control | 2 |
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| `"w"` | Wind | Control | 2 |
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| `"h"` | Heal | Restoration | 1 |
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| `"s"` | Shield | Restoration | 1 |
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A combo multiplier is applied based on how many spells in a row have been cast from different categories:
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- The first spell always scores at base value.
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- Each consecutive spell from a different category than the previous increases the multiplier by 1.
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- Casting a spell from the same category as the previous resets the multiplier back to 1.
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- The score for each spell is its base score multiplied by the current multiplier.
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Return the total score from the sequence of spells.
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# --hints--
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`cast("fihwl")` should return `33`.
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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(cast("fihwl"), 33)`)
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}})
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```
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`cast("lwswfi")` should return `45`.
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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(cast("lwswfi"), 45)`)
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}})
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```
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`cast("wislhfl")` should return `37`.
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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(cast("wislhfl"), 37)`)
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}})
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```
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`cast("sihwlih")` should return `50`.
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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(cast("sihwlih"), 50)`)
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}})
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```
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`cast("wishlfihwslwifihl")` should return `101`.
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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(cast("wishlfihwslwifihl"), 101)`)
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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 cast(spells):
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return spells
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```
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# --solutions--
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```py
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def cast(spells):
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lookup = {
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"f": ("destruction", 3),
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"l": ("destruction", 3),
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"i": ("control", 2),
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"w": ("control", 2),
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"h": ("restoration", 1),
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"s": ("restoration", 1)
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}
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total = 0
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multiplier = 1
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prev_category = None
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for spell in spells:
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category, score = lookup[spell]
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if prev_category and category != prev_category:
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multiplier += 1
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else:
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multiplier = 1
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total += score * multiplier
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prev_category = category
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return total
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```
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