82 lines
1.7 KiB
C++
82 lines
1.7 KiB
C++
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#include <fstream>
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#include <iostream>
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#include <regex>
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#include <set>
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#include <string>
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#include <vector>
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int main()
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{
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const std::string filename = "data.txt";
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std::ifstream ifs(filename);
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if(!ifs.is_open())
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{
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std::cerr << "Missing " << filename << "." << std::endl;
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return -1;
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}
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unsigned long total = 0;
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unsigned long total_pt2 = 0;
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long dos = 0;
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long donts = 0;
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for(std::string line; std::getline(ifs, line); )
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{
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if(line == "")
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continue;
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std::regex pattern("do\\(\\)|don\\'t\\(\\)|mul\\((\\d+),(\\d+)\\)");
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auto pattern_begin = std::sregex_iterator(line.begin(), line.end(), pattern);
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auto pattern_end = std::sregex_iterator();
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bool multiplying = true;
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for (std::sregex_iterator i = pattern_begin; i != pattern_end; ++i)
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{
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std::string result = i->str();
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std::cout << result << std::endl;
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if(i->str() == "do()")
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{
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++dos;
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std::cout << "\033[0m";
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multiplying = true;
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}
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else if(i->str() == "don't()")
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{
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++donts;
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std::cout << "\033[1;31m";
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multiplying = false;
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}
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else
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{
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std::smatch::iterator ip_it = i->begin();
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std::vector<long> numbers;
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for (std::advance(ip_it, 1);
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ip_it != i->end();
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advance(ip_it, 1))
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{
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std::string n = *ip_it;
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numbers.push_back(std::atoi(n.c_str()));
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}
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long result = 1;
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for(auto n : numbers)
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result *= n;
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std::cout << result << std::endl;
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if(multiplying)
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total_pt2 += result;
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total += result;
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}
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}
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}
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std::cout << " Total: " << total << std::endl;
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std::cout << "PT2 Total: " << total_pt2 << std::endl;
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std::cout << "do()s: " << dos << std::endl;
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std::cout << "don't()s: " << donts << std::endl;
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return 0;
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}
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