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114 lines
3.1 KiB
Markdown
114 lines
3.1 KiB
Markdown
---
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id: 69162d64f96574d9bb629efb
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title: "Challenge 110: Word Guesser"
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challengeType: 29
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dashedName: challenge-110
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---
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# --description--
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Given two strings of the same length, a secret word and a guess, compare the guess to the secret word using the following rules:
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- The secret word and guess will only consist of uppercase letters (`"A"` to `"Z"`);
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- For each letter in the guess, replace it with a number according to how it matches the secret word:
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- `"2"` if the letter is in the secret word and in the correct position.
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- `"1"` if the letter is in the secret word but in the wrong position.
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- `"0"` if the letter is not in the secret word.
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- Each letter in the secret word can be used at most once.
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- Exact matches (`"2"`) are assigned first, then partial matches (`"1"`) are assigned from left to right for remaining letters.
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- If a letter occurs multiple times in the guess, it can only match as many times as it appears in the secret word.
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For example, given a secret word of `"APPLE"` and a guess of `"POPPA"`, return `"10201"`:
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The first `"P"` is not in the correct location (`"1"`), the `"O"` isn't in the secret word (`"0"`), the second `"P"` is in the correct location (`"2"`), the third `"P"` is a zero (`"0"`) because the two `"P"`'s in the secret word have been used, and the `"A"` is not in the correct location (`"1"`).
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# --hints--
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`compare("APPLE", "POPPA")` should return `"10201"`.
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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(compare("APPLE", "POPPA"), "10201")`)
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}})
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```
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`compare("REACT", "TRACE")` should return `"11221"`.
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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(compare("REACT", "TRACE"), "11221")`)
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}})
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```
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`compare("DEBUGS", "PYTHON")` should return `"000000"`.
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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(compare("DEBUGS", "PYTHON"), "000000")`)
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}})
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```
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`compare("JAVASCRIPT", "TYPESCRIPT")` should return `"0000222222"`.
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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(compare("JAVASCRIPT", "TYPESCRIPT"), "0000222222")`)
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}})
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```
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`compare("ORANGE", "ROUNDS")` should return `"110200"`.
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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(compare("ORANGE", "ROUNDS"), "110200")`)
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}})
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```
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`compare("WIRELESS", "ETHERNET")` should return `"10021000"`.
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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(compare("WIRELESS", "ETHERNET"), "10021000")`)
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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 compare(word, guess):
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return word
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```
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# --solutions--
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```py
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def compare(word, guess):
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n = len(word)
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result = ["0"] * n
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used_secret = [False] * n
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for i in range(n):
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if guess[i] == word[i]:
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result[i] = "2"
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used_secret[i] = True
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for i in range(n):
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if result[i] == "0":
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for j in range(n):
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if not used_secret[j] and guess[i] == word[j]:
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result[i] = "1"
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used_secret[j] = True
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break
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return "".join(result)
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```
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