60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
package day02
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import (
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"adventofcode2025/utils"
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"fmt"
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"strings"
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)
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func Part1(input string) int {
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ranges := strings.Split(input, ",")
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count := 0
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for _, r := range ranges {
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min_s, max_s := strings.Split(r, "-")[0], strings.Split(r, "-")[1]
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min := utils.MustAtoi(min_s)
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max := utils.MustAtoi(max_s)
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for i := min; i <= max; i++ {
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s := fmt.Sprintf("%d", i)
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if len(s)%2 != 0 {
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continue
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}
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if s[:len(s)/2] != s[len(s)/2:] {
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continue
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}
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count += utils.MustAtoi(s)
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}
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}
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return count
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}
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func Part2(input string) int {
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ranges := strings.Split(input, ",")
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count := 0
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for _, r := range ranges {
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min_s, max_s := strings.Split(r, "-")[0], strings.Split(r, "-")[1]
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min := utils.MustAtoi(min_s)
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max := utils.MustAtoi(max_s)
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for i := min; i <= max; i++ {
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s := fmt.Sprintf("%d", i)
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for numDigits := 1; numDigits <= len(s)/2; numDigits++ {
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if len(s)%numDigits != 0 {
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continue
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}
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found := true
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for j := 1; j < len(s)/numDigits; j++ {
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if s[0:numDigits] != s[j*numDigits:(j+1)*numDigits] {
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found = false
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continue
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}
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}
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if found {
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count += utils.MustAtoi(s)
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break
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}
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}
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}
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}
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return count
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}
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