freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-python/6a22d77ddf034bc4e35b1d54.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a22d77ddf034bc4e35b1d54	Challenge 347: Game Theory	29	challenge-347

--description--

Given two equal length strings representing two players' strategies for a game, return the scores as an array [player1, player2].

• The given strings will only contain one of two letters: "C" (cooperate) or "D" (defect).
• Each character represents one round, scored as follows:
  • If both players cooperate, each scores 3.
  • If both players defect, each scores 1.
  • If one player defects and the other cooperates, the defector scores 5 and the cooperator scores 0.

--hints--

play_game("CCCC", "CCCC") should return [12, 12].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(play_game("CCCC", "CCCC"), [12, 12])`)
}})

play_game("DDDD", "DDDD") should return [4, 4].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(play_game("DDDD", "DDDD"), [4, 4])`)
}})

play_game("CCDD", "CDDD") should return [5, 10].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(play_game("CCDD", "CDDD"), [5, 10])`)
}})

play_game("CCCDCDCCCDDC", "CCDDCDCDDCCD") should return [24, 34].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(play_game("CCCDCDCCCDDC", "CCDDCDCDDCCD"), [24, 34])`)
}})

play_game("DDCCDDDDCDDCDDDCDD", "CCDCCCDCCCDCCCCDCC") should return [66, 21].

({test: () => { runPython(`
from unittest import TestCase
TestCase().assertEqual(play_game("DDCCDDDDCDDCDDDCDD", "CCDCCCDCCCDCCCCDCC"), [66, 21])`)
}})

--seed--

--seed-contents--

def play_game(p1, p2):

    return p1

--solutions--

def play_game(p1, p2):
    scores = [0, 0]
    for i in range(len(p1)):
        if p1[i] == 'C' and p2[i] == 'C':
            scores[0] += 3
            scores[1] += 3
        elif p1[i] == 'D' and p2[i] == 'D':
            scores[0] += 1
            scores[1] += 1
        elif p1[i] == 'D' and p2[i] == 'C':
            scores[0] += 5
        else:
            scores[1] += 5
    return scores