Advent-of-code/1p1.txt at master · AvianAeternum/Advent-of-code · GitHub

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#include <iostream>
#include <string>

std::string input = "";

int halfLength = input.length() / 2;

int getSumOfNumbersThatMatchNextNumber(std::string input)
{
	int sum = 0;
	std::string temp;
	if (input[input.length() - 1] == input[0])
	{
		temp = input[0];
		sum += std::stoi(temp);
	}
	for (int i = 0; i < input.length() - 1; ++i)
	{
		if (input[i] == input[i + 1])
		{
			temp = input[i];
			sum += std::stoi(temp);
		}
	}

	return sum;
}

int getSumOfNumbersThatMatchNumberHalfOfListAway(std::string input)
{
	int sum = 0;
	std::string temp;
	for (int i = 0; i < input.length(); ++i)
	{
		if ((i + halfLength) > (input.length() - 1) && input[(i + halfLength) - input.length()] == input[i])
		{
			temp = input[i];
			sum += std::stoi(temp);
		}
		else if (input[i] == input[i + halfLength])
		{
			temp = input[i];
			sum += std::stoi(temp);
		}
	}
	return sum;
}

int main()
{
	std::cout << "Part 1: " << getSumOfNumbersThatMatchNextNumber(input) << '\n';
	std::cout << "Part 2: " << getSumOfNumbersThatMatchNumberHalfOfListAway(input) << '\n';
	return 0;
}