AdventOfCode2021/source/day1/part2.d

module day1.part2;

import std.stdio;
import util.fileutils;

void slidingSum() {
    int[] values = readInts("source/day1/input.txt");
    int previousSum = values[0] + values[1] + values[2];
    int increaseCount = 0;
    // Iterate over indices 1 to 2 minus the length of the array.
    foreach (i; 1 .. (values.length - 2)) {
        int currentSum = values[i] + values[i + 1] + values[i + 2];
        if (currentSum > previousSum) increaseCount++;
        previousSum = currentSum;
    }
    writefln("%d", increaseCount);
}