diff --git a/.gitignore b/.gitignore index e257658..083209e 100644 --- a/.gitignore +++ b/.gitignore @@ -32,3 +32,4 @@ *.out *.app +program diff --git a/Day2/Question1/input b/Day2/Question1/input new file mode 100644 index 0000000..9352771 --- /dev/null +++ b/Day2/Question1/input @@ -0,0 +1 @@ +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 diff --git a/Day2/Question1/inputTest b/Day2/Question1/inputTest new file mode 100644 index 0000000..a3f22ef --- /dev/null +++ b/Day2/Question1/inputTest @@ -0,0 +1 @@ +11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124 diff --git a/Day2/Question1/main.cpp b/Day2/Question1/main.cpp new file mode 100644 index 0000000..cfb32b1 --- /dev/null +++ b/Day2/Question1/main.cpp @@ -0,0 +1,40 @@ +#include +#include +#include +#include +#include + +int main() { + std::fstream file("input"); + std::string currentID = ""; + uint64_t rangeMin = 0, rangeMax = 0, positionOfHypen = 0, + sumOfAllInvalidIds = 0, numberOfDigits = 0; + double nthSymmetryicalNumber = 0; + + while (std::getline(file, currentID, ',')) { + // I'm sure there is a better way to do this + positionOfHypen = currentID.find('-'); + rangeMin = std::stoull(currentID.substr(0, positionOfHypen)); + rangeMax = std::stoull(currentID.substr(positionOfHypen + 1)); + + for (uint64_t number = rangeMin; number <= rangeMax; number++) { + numberOfDigits = std::floor(std::log10(number)) + 1; + + // Odd numbers can't satisfy the repeating pattern + if (numberOfDigits % 2 == 1) { + continue; + } + + // Really only possible symmetry is here + nthSymmetryicalNumber = + number / static_cast(std::pow(10, numberOfDigits >> 1) + 1); + + // Checking if the number is "whole" + sumOfAllInvalidIds += + nthSymmetryicalNumber == std::trunc(nthSymmetryicalNumber) ? number + : 0; + } + } + std::cout << sumOfAllInvalidIds << std::endl; + return 0; +}