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Handle edge case in LZ compression code and fix docs

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This commit is contained in:
Staszek Welsh
2022-04-28 19:50:17 +01:00
parent 9c805dabb8
commit 55d9810727
3 changed files with 38 additions and 30 deletions
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33
src/data/codingcontracttypes.ts
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@@ -1532,7 +1532,8 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
length += 2;
}
}
return ans.length === length;
return ans.length <= length;
},
},
{
@@ -1555,12 +1556,12 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
"You are given the following LZ-encoded string:\n",
`&nbsp; &nbsp; ${compressed}\n`,
"Decode it and output the original string.\n\n",
"Example: decoding '5aaabc340533bca' chunk-by-chunk\n",
"&nbsp; &nbsp; 5aaabc &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -> &nbsp;aaabc\n",
"&nbsp; &nbsp; 5aaabc34 &nbsp; &nbsp; &nbsp; &nbsp; -> &nbsp;aaabcaab\n",
"&nbsp; &nbsp; 5aaabc340 &nbsp; &nbsp; &nbsp; &nbsp;-> &nbsp;aaabcaab\n",
"&nbsp; &nbsp; 5aaabc34053 &nbsp; &nbsp; &nbsp;-> &nbsp;aaabcaabaabaa\n",
"&nbsp; &nbsp; 5aaabc340533bca &nbsp;-> &nbsp;aaabcaabaabaabca",
"Example: decoding '5aaabb450723abb' chunk-by-chunk\n",
"&nbsp; &nbsp; 5aaabb &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -> &nbsp;aaabb\n",
"&nbsp; &nbsp; 5aaabb45 &nbsp; &nbsp; &nbsp; &nbsp; -> &nbsp;aaabbaaab\n",
"&nbsp; &nbsp; 5aaabb450 &nbsp; &nbsp; &nbsp; &nbsp;-> &nbsp;aaabbaaab\n",
"&nbsp; &nbsp; 5aaabb45072 &nbsp; &nbsp; &nbsp;-> &nbsp;aaabbaaababababa\n",
"&nbsp; &nbsp; 5aaabb450723abb &nbsp;-> &nbsp;aaabbaaababababaabb",
].join(" ");
},
gen: (): string => {
@@ -1591,21 +1592,21 @@ export const codingContractTypesMetadata: ICodingContractTypeMetadata[] = [
`&nbsp; &nbsp; ${plaintext}\n`,
"Encode it using Lempel-Ziv encoding with the minimum possible output length.\n\n",
"Examples (some have other possible encodings of minimal length):\n",
"&nbsp; &nbsp; abracadabra &nbsp; &nbsp;-> &nbsp;7abracad47\n",
"&nbsp; &nbsp; mississippi &nbsp; &nbsp;-> &nbsp;4miss433ppi\n",
"&nbsp; &nbsp; aAAaAAaAaAA &nbsp; &nbsp;-> &nbsp;3aAA53035\n",
"&nbsp; &nbsp; 2718281828 &nbsp; &nbsp; -> &nbsp;627182844\n",
"&nbsp; &nbsp; abcdefghijk &nbsp; &nbsp;-> &nbsp;9abcdefghi02jk\n",
"&nbsp; &nbsp; aaaaaaaaaaa &nbsp; &nbsp;-> &nbsp;1a911a\n",
"&nbsp; &nbsp; aaaaaaaaaaaa &nbsp; -> &nbsp;1a912aa\n",
"&nbsp; &nbsp; aaaaaaaaaaaaa &nbsp;-> &nbsp;1a91031",
"&nbsp; &nbsp; abracadabra &nbsp; &nbsp; -> &nbsp;7abracad47\n",
"&nbsp; &nbsp; mississippi &nbsp; &nbsp; -> &nbsp;4miss433ppi\n",
"&nbsp; &nbsp; aAAaAAaAaAA &nbsp; &nbsp; -> &nbsp;3aAA53035\n",
"&nbsp; &nbsp; 2718281828 &nbsp; &nbsp; &nbsp;-> &nbsp;627182844\n",
"&nbsp; &nbsp; abcdefghijk &nbsp; &nbsp; -> &nbsp;9abcdefghi02jk\n",
"&nbsp; &nbsp; aaaaaaaaaaaa &nbsp; &nbsp;-> &nbsp;3aaa91\n",
"&nbsp; &nbsp; aaaaaaaaaaaaa &nbsp; -> &nbsp;1a91031\n",
"&nbsp; &nbsp; aaaaaaaaaaaaaa &nbsp;-> &nbsp;1a91041",
].join(" ");
},
gen: (): string => {
return comprLZGenerate();
},
solver: (plain: string, ans: string): boolean => {
return comprLZDecode(ans) === plain && ans.length === comprLZEncode(plain).length;
return comprLZDecode(ans) === plain && ans.length <= comprLZEncode(plain).length;
},
},
];