2022 day 25

lachlanroche · lachlanroche · commit 4c8626c6c2fa · 2022-12-26T02:10:51.000+10:00
diff --git a/aoc22.playground/Pages/Day25.xcplaygroundpage/Contents.swift b/aoc22.playground/Pages/Day25.xcplaygroundpage/Contents.swift
@@ -0,0 +1,7 @@
+//: [Previous](@previous)
+
+import Foundation
+
+part1()
+
+//: [Next](@next)
diff --git a/aoc22.playground/Pages/Day25.xcplaygroundpage/Resources/input.txt b/aoc22.playground/Pages/Day25.xcplaygroundpage/Resources/input.txt
@@ -0,0 +1,125 @@
+1100-
+11-1=12012=
+111==2=-022=01
+20---
+1=01=20
+2=2=2=-21-=
+1021-02=10==-
+1-22=12001-0=222011
+1=1-1
+2-2=
+211=211=22-=0=10
+111-111=212--01
+10-2-121
+10=-210000
+12=
+1==2-22--==01-20-0
+1-1==120
+201=120100=1
+1==2111=1=
+1--0-=-01
+2
+2=2
+1=-=0==010-=--021
+1=-2-=1-2=00122-10
+210--21--
+112
+1=0-22-10-2=1==0
+12-12
+1==01-=-
+1-1
+1=1
+11=20102-001=0=-20
+11=11==10
+22210=-=
+12001=-0
+1=-00122200=
+20==-00=2=201=-=
+1-21101021-====-
+2-2=2=0=1122
+10=2
+1-02-10
+21220--=-01--1-1
+1==02-02
+221-=0
+110
+2=122-
+21-0=1=-
+20
+2---2-2-01-1=1110
+2-11-211
+12-110022-
+10101-20-
+211-2211-10-2002
+2--22==1=1122=-0000
+1=0
+10-
+20===21=00222==1
+21-110-11=1
+12--1=02-121
+1101=00--2==0
+11=0-1
+10101-1=21-1121100
+1=1010=-222-
+22=2200---2=2-02-=2
+20=1021=2--2---=
+10=20112
+1-0-10-
+1002002=-==0
+220-110
+1=--=21
+10--0
+122==2-1-
+1-2=100-0-=101
+2=1
+21=0=111=11=000=-2
+12121=0
+1-210-0=
+2-1=111=20-1-2-
+1012-2-02=
+1121=2=1==
+1=101-
+1-21110
+1=2011-0-
+1==0
+1-==2==12011-
+11-2=121==
+20-121002=021==111
+22220-2-02=22=
+221101
+22-=20=02-0-1=-11
+1-=01=010-1-1101-0
+1-1-=0==0=010
+1-212211-=02-11=-
+1=01=
+2000=10=-122=00
+1=1=21-=-
+1-=011=--2-2=12
+2000000=2212-00
+22120-11-1-0-=-2
+112=1---21-0111
+12112220=110
+121=0011-=1-0
+222=-=02121
+2-000010221=
+1=0221=1==-=2010
+1102====
+210=1-02-=1102
+2=-=-201102012
+2-=21-=0=1
+11022-00-2=1210
+1120-0-1012001
+2-
+10==0--0-020110
+1-=02122-0=0=
+1=10=2002=120=1-1=
+1-=11
+1-11201102-
+2-==11102-101
+10
+2-=2=
+2==0-
+111=--12=2
+1=201
+11200-1==2=001=--2
+10---10--=0-2202=1
diff --git a/aoc22.playground/Pages/Day25.xcplaygroundpage/Sources/Day25.swift b/aoc22.playground/Pages/Day25.xcplaygroundpage/Sources/Day25.swift
@@ -0,0 +1,38 @@
+import Foundation
+
+
+public func part1() -> String {
+    var total = 0
+    let value: [Character: Int] = [
+        "=": -2,
+        "-": -1,
+        "0": 0,
+        "1": 1,
+        "2": 2,
+    ]
+    for line in stringsFromFile() where line != "" {
+        var number = 0
+        for ch in line {
+            number *= 5
+            number += value[ch]!
+        }
+        total += number
+    }
+    let digit: [Int: Character] = [
+        0: "0",
+        1: "1",
+        2: "2",
+        3: "=",
+        4: "-"
+    ]
+    var result = [Character]()
+    while total > 0 {
+        let (q, r) = total.quotientAndRemainder(dividingBy: 5)
+        result.insert(digit[r]!, at: 0)
+        total = q
+        if r == 3 || r == 4 {
+            total += 1
+        }
+    }
+    return String(result)
+}
diff --git a/aoc22.playground/contents.xcplayground b/aoc22.playground/contents.xcplayground
@@ -24,5 +24,6 @@
         <page name='Day21'/>
         <page name='Day22'/>
         <page name='Day23'/>
+        <page name='Day25'/>
     </pages>
 </playground>
