day2/day2_part1.lua

@@ -1,42 +0,0 @@
---Lua 5.4.2
-local File = io.open("input.txt", "r")
-
-if not File then
-    print("File not found")
-    return
-end
-
-local SafeReports = 0
-
-for Line in File:lines() do
-    local IsSafe = true
-    local LastSign = 0
-    local LastNumber
-    for Number in Line:gmatch("%d+") do
-        if not LastNumber then
-            LastNumber = Number
-            goto continue
-        end
-        local Difference = math.abs(Number - LastNumber)
-        if Difference > 3 or Difference == 0 then
-            IsSafe = false
-            break
-        end
-        local Sign = (Number - LastNumber) > 0 and 1 or -1
-        if LastSign == 0 then
-            LastSign = Sign
-        else
-            if Sign ~= LastSign then
-                IsSafe = false
-                break
-            end
-        end
-        LastNumber = Number
-        ::continue::
-    end
-    if IsSafe then
-        SafeReports = SafeReports + 1
-    end
-end
-
-print("Safe reports:", SafeReports)

day2/day2_part2.lua

@@ -1,67 +0,0 @@
---Lua 5.4.2
-local File = io.open("input.txt", "r")
-
-if not File then
-    print("File not found")
-    return
-end
-
-local function IsReportSafe(Numbers)
-    local IsSafe = true
-    local LastSign = 0
-    local LastNumber
-    for _, Number in next, Numbers do
-        if not LastNumber then
-            LastNumber = Number
-            goto continue
-        end
-        local Difference = math.abs(Number - LastNumber)
-        if Difference > 3 or Difference == 0 then
-            IsSafe = false
-            break
-        end
-        local Sign = (Number - LastNumber) > 0 and 1 or -1
-        if LastSign == 0 then
-            LastSign = Sign
-        else
-            if Sign ~= LastSign then
-                IsSafe = false
-                break
-            end
-        end
-        LastNumber = Number
-        ::continue::
-    end
-    return IsSafe
-end
-
-local function Clone(t) --surface level copy
-    local Cloned = {}
-    for Key, Value in next, t do
-        Cloned[Key] = Value
-    end
-    return Cloned
-end
-
-local SafeReports = 0
-
-for Line in File:lines() do
-    local Numbers = {}
-    for Number in Line:gmatch("%d+") do
-        table.insert(Numbers, tonumber(Number))
-    end
-    if IsReportSafe(Numbers) then
-        SafeReports = SafeReports + 1
-    else
-        for Index = 1, #Numbers do
-            local NumbersCopy = Clone(Numbers) --yikes
-            table.remove(NumbersCopy, Index)
-            if IsReportSafe(NumbersCopy) then
-                SafeReports = SafeReports + 1
-                break
-            end
-        end
-    end
-end
-
-print("Safe reports:", SafeReports)