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[2020-12-04] Add solutions for day04

master
Elis Hirwing 10 months ago
parent
commit
e550a85656
Signed by: etu GPG Key ID: D57EFA625C9A925F
  1. 2
      Makefile
  2. 13
      day04/example.txt
  3. 1104
      day04/input.txt
  4. 33
      day04/parse.go
  5. 14
      day04/solve1.go
  6. 50
      day04/solve2.go
  7. 4
      main.go

2
Makefile

@ -12,6 +12,8 @@ day03:
go run main.go day03 input
day04:
go run main.go day04 input
day05:
day06:
day07:

13
day04/example.txt

@ -0,0 +1,13 @@
ecl:gry pid:860033327 eyr:2020 hcl:#fffffd
byr:1937 iyr:2017 cid:147 hgt:183cm
iyr:2013 ecl:amb cid:350 eyr:2023 pid:028048884
hcl:#cfa07d byr:1929
hcl:#ae17e1 iyr:2013
eyr:2024
ecl:brn pid:760753108 byr:1931
hgt:179cm
hcl:#cfa07d eyr:2025 pid:166559648
iyr:2011 ecl:brn hgt:59in

1104
day04/input.txt

File diff suppressed because it is too large

33
day04/parse.go

@ -0,0 +1,33 @@
package day04
import (
"strings"
"git.elis.nu/etu/aoc2020/utils"
)
var rows []map[string]string
func ParseFile(input string) {
row := make(map[string]string)
// Parse file
for _, line := range utils.GetLinesFromFile("day04/" + input + ".txt") {
if line == "" {
rows = append(rows, row)
row = make(map[string]string)
continue
}
for _, part := range strings.Split(line, " ") {
parts := strings.Split(part, ":")
row[parts[0]] = parts[1]
}
}
// Don't forget the last item
rows = append(rows, row)
}

14
day04/solve1.go

@ -0,0 +1,14 @@
package day04
import "log"
func Solve1() {
counter := 0
for _, row := range rows {
if len(row) == 8 || len(row) == 7 && row["cid"] == "" {
counter++
}
}
log.Println("2020-12-04.01: Answer:", counter)
}

50
day04/solve2.go

@ -0,0 +1,50 @@
package day04
import (
"log"
"regexp"
)
func Solve2() {
counter := 0
validations := map[string]string{
// Validate Birth year (1920-2002)
"byr": `^(19[2-8][0-9]|199[0-9]|200[0-2])$`,
// Validate Issue year (2010-2020)
"iyr": `^(201[0-9]|2020)$`,
// Validate Expiration year (2020-2030)
"eyr": `^(202[0-9]|2030)$`,
// Validate height (59-76in) or (150-193cm)
"hgt": `^((59|6[0-9]|7[0-6])in|(1[5-8][0-9]|19[0-3])cm)$`,
// Validate Hair color
"hcl": `^#[0-9a-f]{6}$`,
// Validate Eye color
"ecl": `^(amb|blu|brn|gry|grn|hzl|oth)$`,
// Validate Passport ID
"pid": `^[0-9]{9}$`,
}
for _, row := range rows {
valid := true
for key, reg := range validations {
if regexp.MustCompile(reg).FindString(row[key]) == "" {
valid = false
}
}
if valid {
counter++
}
}
// Correct answer: 127
log.Println("2020-12-04.02: Answer:", counter)
}

4
main.go

@ -7,6 +7,7 @@ import (
"git.elis.nu/etu/aoc2020/day01"
"git.elis.nu/etu/aoc2020/day02"
"git.elis.nu/etu/aoc2020/day03"
"git.elis.nu/etu/aoc2020/day04"
"git.elis.nu/etu/aoc2020/utils"
)
@ -24,5 +25,8 @@ func main() {
case "day03":
utils.Perf("2020-12-03", day03.ParseFile, day03.Solve1, day03.Solve2)
case "day04":
utils.Perf("2020-12-04", day04.ParseFile, day04.Solve1, day04.Solve2)
}
}

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