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2025 day01 part2
+18
-3
+18
-3
2025/day01/main.go
+18
-3
2025/day01/main.go
···
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// starting position
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pos := 50
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-
timesAtZero := 0
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+
part1 := 0
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part2 := 0
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scanner := bufio.NewScanner(inputf)
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for scanner.Scan() {
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line := scanner.Text()
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+
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turn, err := parseTurn(line)
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if err != nil {
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log.Fatalf("failed to parse turn: %v", err)
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}
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prevPos := pos
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pos = turn.apply(pos)
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// part 1
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if pos == 0 {
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-
timesAtZero++
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part1++
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}
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// part 2
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p := prevPos
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// mirror the value so we can treat this as a right rotation
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if turn.dir == left {
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p = (100 - prevPos) % 100
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}
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part2 += (p + turn.count) / 100
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}
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if err := scanner.Err(); err != nil {
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log.Fatalf("scanner error: %v", err)
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}
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-
fmt.Println(timesAtZero)
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fmt.Printf("part1: %d\n", part1)
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fmt.Printf("part2: %d\n", part2)
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}
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type turn struct {