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93 lines
2.1 KiB
Markdown
93 lines
2.1 KiB
Markdown
---
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id: 6a22d77ddf034bc4e35b1d54
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title: "Challenge 347: Game Theory"
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challengeType: 29
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dashedName: challenge-347
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---
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# --description--
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Given two equal length strings representing two players' strategies for a game, return the scores as an array `[player1, player2]`.
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- The given strings will only contain one of two letters: `"C"` (cooperate) or `"D"` (defect).
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- Each character represents one round, scored as follows:
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- If both players cooperate, each scores 3.
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- If both players defect, each scores 1.
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- If one player defects and the other cooperates, the defector scores 5 and the cooperator scores 0.
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# --hints--
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`play_game("CCCC", "CCCC")` should return `[12, 12]`.
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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(play_game("CCCC", "CCCC"), [12, 12])`)
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}})
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```
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`play_game("DDDD", "DDDD")` should return `[4, 4]`.
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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(play_game("DDDD", "DDDD"), [4, 4])`)
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}})
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```
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`play_game("CCDD", "CDDD")` should return `[5, 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(play_game("CCDD", "CDDD"), [5, 10])`)
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}})
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```
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`play_game("CCCDCDCCCDDC", "CCDDCDCDDCCD")` should return `[24, 34]`.
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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(play_game("CCCDCDCCCDDC", "CCDDCDCDDCCD"), [24, 34])`)
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}})
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```
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`play_game("DDCCDDDDCDDCDDDCDD", "CCDCCCDCCCDCCCCDCC")` should return `[66, 21]`.
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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(play_game("DDCCDDDDCDDCDDDCDD", "CCDCCCDCCCDCCCCDCC"), [66, 21])`)
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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 play_game(p1, p2):
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return p1
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```
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# --solutions--
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```py
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def play_game(p1, p2):
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scores = [0, 0]
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for i in range(len(p1)):
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if p1[i] == 'C' and p2[i] == 'C':
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scores[0] += 3
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scores[1] += 3
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elif p1[i] == 'D' and p2[i] == 'D':
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scores[0] += 1
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scores[1] += 1
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elif p1[i] == 'D' and p2[i] == 'C':
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scores[0] += 5
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else:
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scores[1] += 5
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return scores
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```
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