#include <fstream>
#include <iostream>
#include <set>
#include <sstream>
#include <string>
#include <vector>

int main()
{
	std::ifstream ifs("data.txt");
	if(!ifs.is_open())
	{
		std::cerr << "Missing data.txt." << std::endl;
		return -1;
	}

	unsigned long total = 0;
	unsigned long total_pt2 = 0;

	for(std::string line; std::getline(ifs, line); )
	{
		if(line == "")
			continue;

		std::istringstream input(line);
		long *last = nullptr;
		bool *increasing = nullptr;
		bool safe = true;
		for(std::string value; std::getline(input, value, ' '); )
		{
			long current;
			// Get the value:
			try {
				current = std::atoi(value.c_str());
			} catch (const std::exception &e) {
				break;
			}

			// See if it's the first value:
			if(!last)
			{
				last = new long(current);
				continue;
			}

			// See if it's the second value:
			if(!increasing)
			{
				increasing = new bool(current > *last);
			}

			auto diff = current - *last;
			if(*increasing &&
			   (diff < 1 || diff > 3))
			{
				safe = false;
				break;
			}
			if(!*increasing &&
			   (diff < -3 || diff > -1))
			{
				safe = false;
				break;
			}

			if(last)
				*last = current;
		}
		if(increasing && last // actually made it through at least 2 values
		   && safe)
			total++;

		if(increasing)
			delete increasing, increasing = nullptr;
		if(last)
			delete last, last = nullptr;
	}

	std::cout << "    Total: " <<     total << std::endl;
	std::cout << "PT2 Total: " << total_pt2 << std::endl;

	return 0;
}