39 lines
715 B
Go
39 lines
715 B
Go
package day04
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import (
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"aoc2015/aoclib"
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"crypto/md5"
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"encoding/hex"
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"strconv"
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"strings"
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)
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func findMd5SumStartsWith(secretStart string, start string) int {
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var secret string
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var md5sum [16]byte
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counter := 0
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for true {
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secret = secretStart + strconv.Itoa(counter)
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md5sum = md5.Sum([]byte(secret))
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if strings.HasPrefix(hex.EncodeToString(md5sum[:]), start) {
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return counter
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}
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counter++
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}
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return -1
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}
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func Part1(puzzle aoclib.Puzzle) interface{} {
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secretStart := puzzle.GetInputArray()[0]
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return findMd5SumStartsWith(secretStart, "00000")
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}
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func Part2(puzzle aoclib.Puzzle) interface{} {
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secretStart := puzzle.GetInputArray()[0]
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return findMd5SumStartsWith(secretStart, "000000")
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}
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