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

int main()
{
	std::vector<std::string> input;

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

	std::string line;
	while(!ifs.eof())
	{
		ifs >> line;
		if(ifs.eof())
			break;

		input.push_back(line);
	}

	int answer = 0;
	int num = 50;
	for(const std::string &line : input)
	{
		bool to_right = ('R' == line[0]);
		int amount = std::atoi(line.substr(1).c_str());

		if(!to_right)
			amount *= -1;

		num += amount;
		num %= 100;
		if(num == 0)
			++answer;
	}

	std::cout << "Part 1: " << answer << std::endl;

	answer = 0;
	num = 50;
	for(const std::string &line : input)
	{
		bool to_right = ('R' == line[0]);
		int amount = std::atoi(line.substr(1).c_str());

		// slow, but accurate. :)
		for(auto i = 0; i < amount; ++i)
		{
			num += (to_right ? 1 : -1);
			num %= 100;
			if(num < 0)
				num += 100;
			if(num == 0)
				++answer;
		}
	}

	std::cout << "Part 2: " << answer << std::endl;

	return 0;
}