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42 lines
679 B
Go
42 lines
679 B
Go
package one
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import (
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"bufio"
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"bytes"
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"io"
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"math"
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"strings"
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)
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func Solve(buf []byte) (int, error) {
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r := bytes.NewReader(buf)
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left, right, err := parseLines(r)
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if err != nil {
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return 0, err
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}
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var sum int
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for i, n := range left {
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sum += int(math.Abs(float64(n - right[i])))
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}
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return sum, nil
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}
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func parseLines(r io.Reader) ([]int, []int, error) {
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var left, right []int
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scanner := bufio.NewScanner(r)
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for scanner.Scan() {
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nums := strings.Fields(scanner.Text())
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left = insertSorted(left, mustConv(nums[0]))
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right = insertSorted(right, mustConv(nums[1]))
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}
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if err := scanner.Err(); err != nil {
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return nil, nil, err
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}
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return left, right, nil
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}
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