using DelimitedFiles

depths = readdlm("day1input.txt")

diffs = depths[2:end] - depths[1:end-1]

pos_diff_count = size(findall(diffs .> 0), 1)

println("depth increases: ", pos_diff_count, " / ", size(diffs, 1))

window_size = 3

window_sums = [sum(depths[i:i+2]) for i in 1:size(depths, 1)-2]

window_diffs = window_sums[2:end] - window_sums[1:end-1]

pos_wdiff_count = size(findall(window_diffs .> 0), 1)

println("window sum increases: ", pos_wdiff_count,
        " / ", size(window_diffs, 1))