Public
Edited
Apr 1, 2024
Paused
1 star
decompressedLength("ADVENT") == 6
decompressedLength("A(1x5)BC") == 7
decompressedLength("(3x3)XYZ") == 9
decompressedLength("A(2x2)BCD(2x2)EFG") == 11
decompressedLength("(6x1)(1x3)A") == 6
decompressedLength(input)
function decompressedLength(string) {
let i = 0;
let totalLength = 0;
const parseUntil = (test) => {
let buf = "";
while (true) {
const c = string[i];
if (c == undefined) {
return buf;
}
if (test(c)) {
i++;
return buf;
}
buf += c;
i++;
}
};
while (i < string.length) {
const chars = parseUntil((c) => c == "(");
totalLength += chars.length;
const countToTake = Number(parseUntil((c) => c == "x"));
const repeats = Number(parseUntil((c) => c == ")"));
totalLength += countToTake * repeats;
i += countToTake;
}
return totalLength;
}
decompressedLength2("(3x3)XYZ") == 9
decompressedLength2("X(8x2)(3x3)ABCY") == "XABCABCABCABCABCABCY".length
decompressedLength2("(27x12)(20x12)(13x14)(7x10)(1x12)A") == 241920
decompressedLength2(
"(25x3)(3x3)ABC(2x3)XY(5x2)PQRSTX(18x9)(3x2)TWO(5x7)SEVEN"
) == 445
decompressedLength2(input)
function decompressedLength2(string) {
let i = 0;
let totalLength = 0;
const parseUntil = (test) => {
let buf = "";
while (true) {
const c = string[i];
if (c == undefined) {
return buf;
}
if (test(c)) {
i++;
return buf;
}
buf += c;
i++;
}
};
const takeCount = (count) => {
let buf = "";
let j = 0;
while (j < count) {
const c = string[i + j];
buf += c;
j++;
}
return buf;
};
while (i < string.length) {
const chars = parseUntil((c) => c == "(");
totalLength += chars.length;
const countToTake = Number(parseUntil((c) => c == "x"));
const repeats = Number(parseUntil((c) => c == ")"));
const substring = takeCount(countToTake);
totalLength += decompressedLength2(substring) * repeats;
i += countToTake;
}
return totalLength;
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.