62 lines
900 B
Go
62 lines
900 B
Go
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package advent
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import (
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"AdventOfCode2021/util"
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"math"
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"strconv"
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)
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func Day1Part1(ctx *util.AOCContext) (string, error) {
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incCount := 0
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val := int64(math.MaxInt64)
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for _, v := range ctx.InputLines() {
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num, err := strconv.ParseInt(v, 10, 64)
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if err != nil {
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return "", err
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}
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if val < num {
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incCount++
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}
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val = num
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}
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return strconv.Itoa(incCount), nil
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}
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func Day1Part2(ctx *util.AOCContext) (string, error) {
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incCount := 0
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input := ctx.InputLines()
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prev := int64(math.MaxInt64)
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sw0 := int64(0)
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sw1 := int64(0)
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sw2 := int64(0)
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for i, v := range input {
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num, err := strconv.ParseInt(v, 10, 64)
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if err != nil {
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return "", err
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}
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sw0 = sw1
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sw1 = sw2
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sw2 = num
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val := sw0 + sw1 + sw2
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if i > 2 && prev < val {
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incCount++
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//fmt.Printf("%d < %d + %d + %d\n", prev, sw0, sw1, sw2)
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}
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prev = val
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}
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return strconv.Itoa(incCount), nil
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}
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