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- import java.util.ArrayList;
- import java.util.Scanner;
- public class AoC2 {
- public static void main(String[] args) {
- Scanner scanner = new Scanner(System.in);
- ArrayList<Integer> list = new ArrayList<>();
- ArrayList<Integer> sums = new ArrayList<>();
- while (true) {
- int input = Integer.valueOf(scanner.nextLine());
- if (input == -1) {
- break;
- }
- list.add(input);
- }
- for (int i = 0; i <= list.size() - 3; i++) {
- int sum = list.get(i) + list.get(i + 1) + list.get(i + 2);
- sums.add(sum);
- }
- int increased = 0;
- for (int z = 1; z < sums.size(); z++) {
- if (sums.get(z) > sums.get(z - 1)) {
- increased++;
- }
- }
- System.out.println(increased);
- }
- }
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