alan/adventofcode
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

day02

Browse Source
This commit is contained in:
Alan R Evans
2025-12-04 11:53:14 +00:00
parent 9c2e2c68dd
commit bcd7daea9e
2 changed files with 130 additions and 67 deletions
Download Patch File Download Diff File Expand all files Collapse all files

59
2025/go/day02/day02.go Normal file
View File

@@ -0,0 +1,59 @@
package day02
import (
"adventofcode2025/utils"
"fmt"
"strings"
)
func Part1(input string) int {
ranges := strings.Split(input, ",")
count := 0
for _, r := range ranges {
min_s, max_s := strings.Split(r, "-")[0], strings.Split(r, "-")[1]
min := utils.MustAtoi(min_s)
max := utils.MustAtoi(max_s)
for i := min; i <= max; i++ {
s := fmt.Sprintf("%d", i)
if len(s)%2 != 0 {
continue
}
if s[:len(s)/2] != s[len(s)/2:] {
continue
}
count += utils.MustAtoi(s)
}
}
return count
}
func Part2(input string) int {
ranges := strings.Split(input, ",")
count := 0
for _, r := range ranges {
min_s, max_s := strings.Split(r, "-")[0], strings.Split(r, "-")[1]
min := utils.MustAtoi(min_s)
max := utils.MustAtoi(max_s)
for i := min; i <= max; i++ {
s := fmt.Sprintf("%d", i)
for numDigits := 1; numDigits <= len(s)/2; numDigits++ {
if len(s)%numDigits != 0 {
continue
}
found := true
for j := 1; j < len(s)/numDigits; j++ {
if s[0:numDigits] != s[j*numDigits:(j+1)*numDigits] {
found = false
continue
}
}
if found {
count += utils.MustAtoi(s)
break
}
}
}
}
return count
}

138
2025/go/main.go
View File

@@ -9,6 +9,10 @@ import (
// "strings" // "strings"
// "time" // "time"
"adventofcode2025/day01" "adventofcode2025/day01"
"adventofcode2025/day02"
"adventofcode2025/day03"
"adventofcode2025/day04"
"adventofcode2025/utils" "adventofcode2025/utils"
) )
@@ -22,72 +26,72 @@ func main() {
case 1: case 1:
fmt.Printf("part 1: %d\n", day01.Part1(utils.Readfile(d))) fmt.Printf("part 1: %d\n", day01.Part1(utils.Readfile(d)))
fmt.Printf("part 2: %d\n", day01.Part2(utils.Readfile(d))) fmt.Printf("part 2: %d\n", day01.Part2(utils.Readfile(d)))
// case 2: case 2:
// fmt.Printf("part 1: %d\n", day02.Part1(utils.Readfile(d))) fmt.Printf("part 1: %d\n", day02.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day02.Part2(utils.Readfile(d))) fmt.Printf("part 2: %d\n", day02.Part2(utils.Readfile(d)))
// case 3: case 3:
// fmt.Printf("part 1: %d\n", day03.Part1(utils.Readfile(d))) fmt.Printf("part 1: %d\n", day03.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day03.Part2(utils.Readfile(d))) fmt.Printf("part 2: %d\n", day03.Part2(utils.Readfile(d)))
// case 4: case 4:
// fmt.Printf("part 1: %d\n", day04.Part1(utils.Readfile(d))) fmt.Printf("part 1: %d\n", day04.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day04.Part2(utils.Readfile(d))) fmt.Printf("part 2: %d\n", day04.Part2(utils.Readfile(d)))
// case 6: // case 6:
// fmt.Printf("part 1: %d\n", day06.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day06.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day06.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day06.Part2(utils.Readfile(d)))
// case 7: // case 7:
// fmt.Printf("part 1: %d\n", day07.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day07.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day07.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day07.Part2(utils.Readfile(d)))
// case 8: // case 8:
// fmt.Printf("part 1: %d\n", day08.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day08.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day08.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day08.Part2(utils.Readfile(d)))
// case 9: // case 9:
// fmt.Printf("part 1: %d\n", day09.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day09.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day09.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day09.Part2(utils.Readfile(d)))
// case 10: // case 10:
// fmt.Printf("part 1: %d\n", day10.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day10.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day10.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day10.Part2(utils.Readfile(d)))
// case 11: // case 11:
// fmt.Printf("part 1: %d\n", day11.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day11.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day11.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day11.Part2(utils.Readfile(d)))
// case 12: // case 12:
// fmt.Printf("part 1: %d\n", day12.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day12.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day12.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day12.Part2(utils.Readfile(d)))
// case 13: // case 13:
// fmt.Printf("part 1: %d\n", day13.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day13.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day13.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day13.Part2(utils.Readfile(d)))
// case 14: // case 14:
// fmt.Printf("part 1: %d\n", day14.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day14.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day14.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day14.Part2(utils.Readfile(d)))
// case 15: // case 15:
// fmt.Printf("part 1: %d\n", day15.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day15.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day15.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day15.Part2(utils.Readfile(d)))
// case 16: // case 16:
// fmt.Printf("part 1: %d\n", day16.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day16.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day16.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day16.Part2(utils.Readfile(d)))
// case 17: // case 17:
// fmt.Printf("part 1: %s\n", day17.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %s\n", day17.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day17.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day17.Part2(utils.Readfile(d)))
// case 18: // case 18:
// fmt.Printf("part 1: %d\n", day18.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day18.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day18.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day18.Part2(utils.Readfile(d)))
// case 19: // case 19:
// fmt.Printf("part 1: %d\n", day19.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day19.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day19.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day19.Part2(utils.Readfile(d)))
// case 21: // case 21:
// fmt.Printf("part 1: %d\n", day21.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day21.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day21.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day21.Part2(utils.Readfile(d)))
// case 22: // case 22:
// fmt.Printf("part 1: %d\n", day22.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day22.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day22.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day22.Part2(utils.Readfile(d)))
// case 23: // case 23:
// fmt.Printf("part 1: %d\n", day23.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day23.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day23.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day23.Part2(utils.Readfile(d)))
// case 24: // case 24:
// fmt.Printf("part 1: %d\n", day24.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day24.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day24.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day24.Part2(utils.Readfile(d)))
// case 25: // case 25:
// fmt.Printf("part 1: %d\n", day25.Part1(utils.Readfile(d))) // fmt.Printf("part 1: %d\n", day25.Part1(utils.Readfile(d)))
// fmt.Printf("part 2: %d\n", day25.Part2(utils.Readfile(d))) // fmt.Printf("part 2: %d\n", day25.Part2(utils.Readfile(d)))
default: default:
panic(fmt.Errorf("no such day: %d", d)) panic(fmt.Errorf("no such day: %d", d))
} }
@@ -97,7 +101,7 @@ func main() {
// Reads day from os.Args. // Reads day from os.Args.
func day() int { func day() int {
latest := 0 latest := 3
if len(os.Args) == 1 { if len(os.Args) == 1 {
return latest return latest
} }