65 lines
1.6 KiB
Plaintext
65 lines
1.6 KiB
Plaintext
func part1_is_invalid_id[s: str] : bool
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len := str.len(s)
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if len % 2 != 0
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return false
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first := str.substr(s, 0, len / 2)
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second := str.substr(s, len / 2, len / 2)
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return str.equal(first, second)
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func part1[ranges: Array] : void
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sum := 0
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for i in 0..ranges->size
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parts := array.nth(ranges, i) |> str.split("-")
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start := array.nth(parts, 0) |> str.parse_i64()
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end := array.nth(parts, 1) |> str.parse_i64()
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for n in (start)..end+1
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if part1_is_invalid_id(str.from_i64(n))
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sum += n
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io.println_i64(sum)
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// had to cheat this one
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func part2_is_invalid_id[s: str] : bool
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len := str.len(s)
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if len < 2
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return false
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for div in 1..(len / 2 + 1)
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if len % div == 0
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u := str.substr(s, 0, div)
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is_repeat := true
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for k in 1..(len / div)
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segment := str.substr(s, k * div, div)
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if !str.equal(segment, u)
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is_repeat = false
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if is_repeat
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return true
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return false
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func part2[ranges: Array] : void
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sum := 0
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for i in 0..ranges->size
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parts := array.nth(ranges, i) |> str.split("-")
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start := array.nth(parts, 0) |> str.parse_i64()
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end := array.nth(parts, 1) |> str.parse_i64()
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for n in (start)..end+1
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if part2_is_invalid_id(str.from_i64(n))
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sum += n
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io.println_i64(sum)
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func main[] : i64
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~input, ok := io.read_text_file("input.txt")
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if !ok
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panic("failed to open input.txt")
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ranges := str.split(input, ",")
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part1(ranges)
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part2(ranges)
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