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Author SHA1 Message Date
7886c985e1 Add d2p1 to cmake + d2p1 parsing 2025-12-02 18:39:59 -05:00
6 changed files with 103 additions and 98 deletions

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.idea/.name generated Normal file
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AdventOfCode2025

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.idea/editor.xml generated
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@@ -244,102 +244,5 @@
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</component>
</project>

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@@ -34,3 +34,7 @@ add_executable(d1p1-faf src/day1/p1-faf.cpp)
# P2
add_executable(d1p2 src/day1/p2.cpp)
add_executable(d1p2-faf src/day1/p2-faf.cpp)
### Day 2
# P1
add_executable(d2p1 src/day2/p1.cpp)

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input/day2/p1-test.txt Normal file
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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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input/day2/p1.txt Normal file
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9226466333-9226692707,55432-96230,4151-6365,686836-836582,519296-634281,355894-471980,971626-1037744,25107-44804,15139904-15163735,155452-255998,2093-4136,829776608-829880425,4444385616-4444502989,2208288-2231858,261-399,66-119,91876508-91956018,2828255673-2828317078,312330-341840,6464-10967,5489467-5621638,1-18,426-834,3434321102-3434378477,4865070-4972019,54475091-54592515,147-257,48664376-48836792,45-61,1183-1877,24-43

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src/day2/p1.cpp Normal file
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//
// --- Day 2: Gift Shop ---
//
// You get inside and take the elevator to its only other stop: the gift shop.
// "Thank you for visiting the North Pole!" gleefully exclaims a nearby sign.
// You aren't sure who is even allowed to visit the North Pole, but you know you
// can access the lobby through here, and from there you can access the rest of the North Pole base.
//
// As you make your way through the surprisingly extensive selection, one of
// the clerks recognizes you and asks for your help.
//
// As it turns out, one of the younger Elves was playing on a gift shop computer
// and managed to add a whole bunch of invalid product IDs to their gift shop database!
// Surely, it would be no trouble for you to identify the invalid product IDs for them, right?
//
// They've even checked most of the product ID ranges already; they only have
// a few product ID ranges (your puzzle input) that you'll need to check. For example:
//
// 11-22,95-115,998-1012,1188511880-1188511890,222220-222224,
// 1698522-1698528,446443-446449,38593856-38593862,565653-565659,
// 824824821-824824827,2121212118-2121212124
//
// (The ID ranges are wrapped here for legibility; in your input, they
// appear on a single long line.)
//
// The ranges are separated by commas (,); each range gives its
// first ID and last ID separated by a dash (-).
//
// Since the young Elf was just doing silly patterns, you can find the invalid IDs
// by looking for any ID which is made only of some sequence of digits repeated twice.
// So, 55 (5 twice), 6464 (64 twice), and 123123 (123 twice) would all be invalid IDs.
//
// None of the numbers have leading zeroes; 0101 isn't an ID at all. (101 is a
// valid ID that you would ignore.)
//
// Your job is to find all of the invalid IDs that appear in the given ranges.
// In the above example:
//
// 11-22 has two invalid IDs, 11 and 22.
// 95-115 has one invalid ID, 99.
// 998-1012 has one invalid ID, 1010.
// 1188511880-1188511890 has one invalid ID, 1188511885.
// 222220-222224 has one invalid ID, 222222.
// 1698522-1698528 contains no invalid IDs.
// 446443-446449 has one invalid ID, 446446.
// 38593856-38593862 has one invalid ID, 38593859.
// The rest of the ranges contain no invalid IDs.
//
// Adding up all the invalid IDs in this example produces 1227775554.
//
// What do you get if you add up all of the invalid IDs?
#include <iostream>
#include <fstream>
#include "timer.h"
std::tuple<std::vector<char>, std::streampos> read_input(std::string filename) {
std::ifstream stream(filename, std::ios::binary | std::ios::ate);
const auto size = stream.tellg();
stream.seekg(0);
std::vector<char> buffer(size);
stream.read(buffer.data(), size);
stream.close();
return {buffer, size};
}
std::vector<std::string> solve(std::vector<char>* input_data, std::streampos size) {
const char* ptr = input_data->data();
const char* end = ptr + size;
while (ptr < end) {
// Get range
std::vector<char> range;
while (ptr < end) {
}
}
}
int main() {
Timer timer;
std::tuple<std::vector<char>, std::streampos> input_data = read_input("input/day2/p1.txt");
timer.add_point("File read");
std::vector<std::string> ranges = solve(&std::get<0>(input_data), std::get<1>(input_data));
timer.add_point("Solve");
timer.stop();
timer.print();
}