challenges

challenge1.lua (647B)

---

 #!/usr/bin/lua
 
 -- convert the silly input format into something more useful
 iadded = {}
 
 i = 1
 for line in io.lines('challenge2input.txt') do
   addedjs = {}
   for j=1,#line do
     if string.sub(line, j, j) == 'X' then
       table.insert(addedjs, j)
     end
   end
   iadded[i] = addedjs
   i = i + 1
 end
 
 function score (i)
   addedjs = iadded[i]
   s = #addedjs
   for ji,j in ipairs(addedjs) do
     s = s + score(j)
   end
   return s
 end
 
 scores = {}
 
 for i=1,#iadded do
   s = score(i)
   table.insert(scores, s)
 end
 
 table.sort(scores)
 
 print(
   string.format(
     "%d%d%d",
     scores[#scores],
     scores[#scores - 1],
     scores[#scores - 2]
   )
 )