64 lines
1.2 KiB
Lua
Executable File
64 lines
1.2 KiB
Lua
Executable File
#!/usr/bin/env lua
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function file_exists(file)
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local f = io.open(file, "rb")
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if f then f:close() end
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return f ~= nil
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end
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-- get all lines from a file, returns an empty
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-- list/table if the file does not exist
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function lines_from(file)
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if not file_exists(file) then return {} end
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lines = {}
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for line in io.lines(file) do
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lines[#lines + 1] = line
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end
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return lines
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end
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function atoi_list(strings)
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local ints = {}
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for i,s in ipairs(strings) do
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ints[#ints + 1] = tonumber(s)
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end
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return ints
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end
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function toSlices(ints)
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local slices = {}
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for k,i in ipairs(ints) do
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if(k < (#ints - 1)) then
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slices[k] = ints[k] + ints[k+1] + ints[k+2]
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end
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end
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return slices
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end
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-------------------------------------------------
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file = "input.txt"
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allLines = lines_from(file)
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allInts = atoi_list(allLines)
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allSlices = toSlices(allInts)
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for a,b in ipairs(allSlices) do
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print(b)
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end
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last , counter = 0 , 0;
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last = allSlices[1]
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for a,b in ipairs(allSlices) do
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if(a == 1) then
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else
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if(last < b) then
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counter = counter + 1
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end
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last = b
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end
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end
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io.write("The answer is ", counter, ". Congrats, I hope!\n")
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