AOC1

package aoc;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class Day1 {

	public static void main(String[] args) throws IOException {
		// part 1
		var lines = Files.readAllLines(Paths.get("input1.txt")).stream().mapToInt(Integer::parseInt).toArray();
		System.out.println(part1(lines));
		// part 2
		System.out.println(part2(lines));
	}

	public static int part2(int[] lines) {
		for (int n1 : lines) 
			for (int n2 : lines) 
				for (int n3 : lines) 
					if(n1+n2+n3 == 2020)
						return n1*n2*n3;
		return -1;
		
	}

	public static int part1(int[] lines) {
		for (int n1 : lines) 
			for (int n2 : lines) 
				if(n1+n2 == 2020)
					return n1*n2;
		return -1;
	}

}