SimonBaars
diff --git a/‎src/main/java/com/sbaars/adventofcode/year22/days/Day5.java
Lines changed: 71 additions & 4 deletions b/‎src/main/java/com/sbaars/adventofcode/year22/days/Day5.java
Lines changed: 71 additions & 4 deletions
@@ -4,6 +4,11 @@
 import com.sbaars.adventofcode.year22.Day2022;
 
 import java.io.IOException;
+import java.util.*;
+import java.util.stream.Collectors;
+
+import static com.sbaars.adventofcode.common.ReadsFormattedString.readString;
+import static java.lang.Math.toIntExact;
 
 public class Day5 extends Day2022 {
 
@@ -16,18 +21,80 @@ public static void main(String[] args) throws IOException {
     d.downloadIfNotDownloaded();
 //    d.downloadExample();
     d.printParts();
-//    System.in.read();
+    System.in.read();
 //    d.submitPart1();
-//    d.submitPart2();
+    d.submitPart2();
   }
 
+  public record Move(long which, long from, long to) {}
+
   @Override
   public Object part1() {
-    return dayStream();
+    List<Deque<Integer>> stacks = new ArrayList<>();
+    for(int i = 1; i<=9; i++){
+      Deque<Integer> s = new ArrayDeque<>();
+      switch(i){
+        case 1: "NSDCVQT".chars().forEach(s::add); break;
+        case 2: "MFV".chars().forEach(s::add); break;
+        case 3: "FQWDPNHM".chars().forEach(s::add); break;
+        case 4: "DQRTF".chars().forEach(s::add); break;
+        case 5: "RFMNQHVB".chars().forEach(s::add); break;
+        case 6: "CFGNPWQ".chars().forEach(s::add); break;
+        case 7: "WFRLCT".chars().forEach(s::add); break;
+        case 8: "TZNS".chars().forEach(s::add); break;
+        case 9: "MSDJRQHN".chars().forEach(s::add); break;
+      }
+      stacks.add(s);
+    }
+
+    List<Move> moves = dayStream().map(String::trim).map(s -> readString(s, "move %n from %n to %n", Move.class)).toList();
+    for(Move m : moves) {
+      for(int i = 0; i<m.which; i++) {
+        int top = stacks.get(toIntExact(m.from-1)).removeLast();
+        stacks.get(toIntExact(m.to-1)).addLast(top);
+        System.out.println(((char)top)+" moved");
+      }
+    }
+
+    return stacks.stream().map(Deque::peekLast).map(e -> Character.toString((char)(int)e)).collect(Collectors.joining());
   }
 
+  private String toASCII(int value) {
+    int length = 4;
+    StringBuilder builder = new StringBuilder(length);
+    for (int i = length - 1; i >= 0; i--) {
+      builder.append((char) ((value >> (8 * i)) & 0xFF));
+    }
+    return builder.toString();
+  }
+
+
   @Override
   public Object part2() {
-    return "";
+    List<Deque<Integer>> stacks = new ArrayList<>();
+    for(int i = 1; i<=9; i++){
+      Deque<Integer> s = new ArrayDeque<>();
+      switch(i){
+        case 1: "NSDCVQT".chars().forEach(s::add); break;
+        case 2: "MFV".chars().forEach(s::add); break;
+        case 3: "FQWDPNHM".chars().forEach(s::add); break;
+        case 4: "DQRTF".chars().forEach(s::add); break;
+        case 5: "RFMNQHVB".chars().forEach(s::add); break;
+        case 6: "CFGNPWQ".chars().forEach(s::add); break;
+        case 7: "WFRLCT".chars().forEach(s::add); break;
+        case 8: "TZNS".chars().forEach(s::add); break;
+        case 9: "MSDJRQHN".chars().forEach(s::add); break;
+      }
+      stacks.add(s);
+    }
+
+    List<Move> moves = dayStream().map(String::trim).map(s -> readString(s, "move %n from %n to %n", Move.class)).toList();
+    for(Move m : moves) {
+      List<Integer> toBeMoved = new ArrayList<>();
+      for(int i = 0; i<m.which; i++) toBeMoved.add(0, stacks.get(toIntExact(m.from-1)).removeLast());
+      toBeMoved.forEach(i -> stacks.get(toIntExact(m.to-1)).addLast(i));
+    }
+
+    return stacks.stream().map(Deque::peekLast).map(e -> Character.toString((char)(int)e)).collect(Collectors.joining());
   }
 }