36 lines
663 B
Go
36 lines
663 B
Go
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package d9
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import (
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"strconv"
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"strings"
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)
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func toNum(str byte) int {
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num, _ := strconv.Atoi(string(str))
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return num
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}
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func bigger(a byte, b byte) bool {
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return toNum(a) > toNum(b)
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}
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func P1(in string) int {
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lines := addWalls(strings.Split(strings.TrimSpace(in), "\n"))
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risk := 0
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for i := 1; i < len(lines)-1; i++ {
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for j := 1; j < len(lines[0])-1; j++ {
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current := lines[i][j]
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top := bigger(lines[i-1][j], current)
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right := bigger(lines[i][j+1], current)
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bottom := bigger(lines[i+1][j], current)
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left := bigger(lines[i][j-1], current)
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if top && right && bottom && left {
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risk += toNum(current) + 1
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}
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}
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}
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return risk
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}
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