day1/day1_part2.lua

@@ -1,49 +0,0 @@
---Lua 5.4.2
-local File = io.open("input.txt", "r")
-
-if not File then
-    print("File not found")
-    return
-end
-
-local LeftList = {}
-local RightList = {}
-
-for Line in File:lines() do
-    local LeftId, RightId = Line:match("(%d+)%s+(%d+)")
-    table.insert(LeftList, tonumber(LeftId))
-    table.insert(RightList, tonumber(RightId))
-end
-
-File:close()
-
-if #LeftList ~= #RightList then
-    print("Lists are not the same size")
-    return
-end
-
---[[
-    Format:
-    Appearances[Id] = AppearanceCount
---]]
-local Appearances = {}
-
-for ListIndex = 1, #RightList do
-    local Id = RightList[ListIndex]
-    if not Appearances[Id] then
-        Appearances[Id] = 0
-    end
-    Appearances[Id] = Appearances[Id] + 1
-end
-
-local SimilarityScore = 0
-
-for ListIndex = 1, #LeftList do
-    local Id = LeftList[ListIndex]
-    local AppearanceCount = Appearances[Id]
-    if AppearanceCount then
-        SimilarityScore = SimilarityScore + Id * AppearanceCount
-    end
-end
-
-print("Similarity score:", SimilarityScore)