Day 2 part 1
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.gitignore
vendored
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.gitignore
vendored
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*.out
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*.out
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*.app
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*.app
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program
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Day2/Question1/input
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Day2/Question1/input
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16100064-16192119,2117697596-2117933551,1-21,9999936269-10000072423,1770-2452,389429-427594,46633-66991,877764826-877930156,880869-991984,18943-26512,7216-9427,825-1162,581490-647864,2736-3909,39327886-39455605,430759-454012,1178-1741,219779-244138,77641-97923,1975994465-1976192503,3486612-3602532,277-378,418-690,74704280-74781349,3915-5717,665312-740273,69386294-69487574,2176846-2268755,26-45,372340114-372408052,7996502103-7996658803,7762107-7787125,48-64,4432420-4462711,130854-178173,87-115,244511-360206,69-86
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Day2/Question1/inputTest
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Day2/Question1/inputTest
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11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124
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Day2/Question1/main.cpp
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Day2/Question1/main.cpp
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#include <cmath>
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#include <cstdint>
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#include <fstream>
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#include <iostream>
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#include <string>
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int main() {
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std::fstream file("input");
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std::string currentID = "";
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uint64_t rangeMin = 0, rangeMax = 0, positionOfHypen = 0,
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sumOfAllInvalidIds = 0, numberOfDigits = 0;
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double nthSymmetryicalNumber = 0;
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while (std::getline(file, currentID, ',')) {
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// I'm sure there is a better way to do this
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positionOfHypen = currentID.find('-');
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rangeMin = std::stoull(currentID.substr(0, positionOfHypen));
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rangeMax = std::stoull(currentID.substr(positionOfHypen + 1));
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for (uint64_t number = rangeMin; number <= rangeMax; number++) {
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numberOfDigits = std::floor(std::log10(number)) + 1;
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// Odd numbers can't satisfy the repeating pattern
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if (numberOfDigits % 2 == 1) {
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continue;
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}
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// Really only possible symmetry is here
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nthSymmetryicalNumber =
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number / static_cast<double>(std::pow(10, numberOfDigits >> 1) + 1);
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// Checking if the number is "whole"
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sumOfAllInvalidIds +=
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nthSymmetryicalNumber == std::trunc(nthSymmetryicalNumber) ? number
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: 0;
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}
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}
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std::cout << sumOfAllInvalidIds << std::endl;
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return 0;
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}
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