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pin2t · Jul 30, 2022 · 608fe14 · 608fe14
1 parent 94af16e
commit 608fe14
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Showing 9 changed files with 19 additions and 23 deletions.
diff --git a/d10.java b/d10.java
@@ -1,6 +1,5 @@
 import java.io.*;
 import java.util.*;
-import java.util.stream.Collectors;
 
 public class d10 {
     public static void main(String[] args) {
@@ -10,7 +9,7 @@ public static void main(String[] args) {
         var incScore = new HashMap<String, Long>() {{put("(", 1L); put("[", 2L); put("{", 3L); put("<", 4L);}};
         var error = 0L;
         var incompletes = new ArrayList<Long>();
-        for (String line : reader.lines().collect(Collectors.toList())) {
+        for (String line : reader.lines().toList()) {
             var i = 0;
             var stack = new LinkedList<String>();
             while (i < line.length()) {

diff --git a/d11.java b/d11.java
@@ -1,6 +1,6 @@
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
-import java.util.stream.Collectors;
+import java.util.Arrays;
 
 import static java.lang.System.out;
 
@@ -33,11 +33,9 @@ static class Board {
 
         Board(BufferedReader reader) {
             this.energy = new int[CAPACITY * CAPACITY];
-            for (int i = 0; i < this.energy.length; i++) {
-                this.energy[i] = -1000;
-            }
+            Arrays.fill(this.energy, -1000);
             int i = 1;
-            for (String line : reader.lines().collect(Collectors.toList())) {
+            for (String line : reader.lines().toList()) {
                 for (int j = 1; j <= line.length(); j++) {
                     this.energy[i * CAPACITY + j] = line.charAt(j - 1) - '0';
                 }

diff --git a/d12.java b/d12.java
@@ -63,7 +63,7 @@ static class Edge {
         final String from, to;
 
         Edge(String s) {
-            var pair = s.split("\\-");
+            var pair = s.split("-");
             this.from = pair[0];
             this.to = pair[1];
         }

diff --git a/d14.java b/d14.java
@@ -2,6 +2,7 @@
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.util.HashMap;
+import java.util.function.Supplier;
 
 import static java.lang.System.out;
 
@@ -22,6 +23,7 @@ public static void main(String[] args) throws IOException {
             line = reader.readLine();
             rules.put(line.substring(0, 2), line.charAt(6));
         }
+        Supplier<Long> difference = () -> counts.values().stream().max(Long::compareTo).get() - counts.values().stream().min(Long::compareTo).get();
         for (int step = 1; step <= 40; step++) {
             var newpairs = new HashMap<String, Long>();
             for (var pair : pairs.entrySet()) {
@@ -32,10 +34,10 @@ public static void main(String[] args) throws IOException {
                 }
             }
             if (step == 10) {
-                out.println(counts.values().stream().max(Long::compareTo).get() - counts.values().stream().min(Long::compareTo).get());
+                out.println(difference.get());
             }
             pairs = newpairs;
         }
-        out.println(counts.values().stream().max(Long::compareTo).get() - counts.values().stream().min(Long::compareTo).get());
+        out.println(difference.get());
     }
 }
diff --git a/d18.java b/d18.java
@@ -3,7 +3,6 @@
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
-import java.util.stream.Collectors;
 
 import static java.lang.System.out;
 
@@ -12,7 +11,7 @@ public class d18 {
 
     public static void main(String[] args) {
         var reader = new BufferedReader(new InputStreamReader(System.in));
-        var numbers = reader.lines().collect(Collectors.toList());
+        var numbers = reader.lines().toList();
         var result = numbers.get(0);
         for (var i = 1; i < numbers.size(); i++) {
             result = sum(result, numbers.get(i));
@@ -75,8 +74,7 @@ static String explode(String n, int pos, Matcher matcher) {
 
     static String split(String n, int pos) {
         var regular = peekRegular(n, pos);
-        var result =  n.substring(0, pos) + "[" + regular / 2 + "," + (regular / 2 + regular % 2) + "]" + n.substring(pos + 2);
-        return result;
+        return n.substring(0, pos) + "[" + regular / 2 + "," + (regular / 2 + regular % 2) + "]" + n.substring(pos + 2);
     }
 
     static boolean isdigit(String s, int pos) { return s.charAt(pos) >= '0' && s.charAt(pos) <= '9'; }

diff --git a/d19.java b/d19.java
@@ -64,7 +64,7 @@ static Optional<Position> matchAll(Set<Position> unique, BeaconsScanner scanner)
     static Optional<Position> match(Set<Position> beacons, BeaconsScanner scanner) {
         for (Position beacon : beacons) {
             for (Position p : scanner.beacons) {
-                var mapped = scanner.beacons.stream().map(b -> b.move(beacon.x - p.x, beacon.y - p.y, beacon.z - p.z)).collect(Collectors.toList());
+                var mapped = scanner.beacons.stream().map(b -> b.move(beacon.x - p.x, beacon.y - p.y, beacon.z - p.z)).toList();
                 if (mapped.stream().filter(beacons::contains).count() >= 12) {
                     beacons.addAll(mapped);
                     return Optional.of(new Position(beacon.x - p.x, beacon.y - p.y, beacon.z - p.z));

diff --git a/d22.java b/d22.java
@@ -65,7 +65,7 @@ static class Cuboid {
 
         Cuboid(String s) {
             var m = commandPtn.matcher(s);
-            m.matches();
+            if (!m.matches()) throw new RuntimeException("invalid cuboid format " + s);
             this.x1 = Integer.parseInt(m.group(1));
             this.x2 = Integer.parseInt(m.group(2));
             this.y1 = Integer.parseInt(m.group(3));

diff --git a/d23.java b/d23.java
@@ -99,14 +99,14 @@ List<State> moves() {
             for (Amphipod a : amphipods)  {
                 // if amphipod in the hallway and can step into its destination - step in
                 if (a.pos() != 2 && a.pos() != 4 && a.pos() != 6 && a.pos() != 8) {
-                    if (!amphipods.stream().anyMatch(aa -> {
+                    if (amphipods.stream().noneMatch(aa -> {
                                 if (a.destination() > a.pos()) {
                                     return aa.depth() == 0 && aa.pos() > a.pos() && aa.pos() <= a.destination();
                                 } else {
                                     return aa.depth() == 0 && aa.pos() >= a.destination() && aa.pos() < a.pos();
                                 }
                             }) &&
-                        !amphipods.stream().anyMatch(aa -> aa.pos() == a.destination() && ((aa.type() - 'A') * 2 + 2) != a.destination())) {
+                            amphipods.stream().noneMatch(aa -> aa.pos() == a.destination() && ((aa.type() - 'A') * 2 + 2) != a.destination())) {
                         result.add(this.move(a, a.destination()));
                     }
                 } else if (a.pos() != a.destination() ||
@@ -116,14 +116,14 @@ List<State> moves() {
                         // conditions:
                         // 1. no other amphipods between amphipod.pos and the dest in hallway
                         // 2. no other amphipods in the amphipod's room with lower depth
-                        if (!amphipods.stream().anyMatch(aa -> {
+                        if (amphipods.stream().noneMatch(aa -> {
                                     if (dest > a.pos()) {
                                         return aa.pos() > a.pos() && aa.pos() <= dest && aa.depth() == 0;
                                     } else {
                                         return aa.pos() >= dest && aa.depth() == 0 && aa.pos() < a.pos();
                                     }
                                 }) &&
-                            !amphipods.stream().anyMatch(aa -> aa.pos() == a.pos() && aa.depth() < a.depth())) {
+                                amphipods.stream().noneMatch(aa -> aa.pos() == a.pos() && aa.depth() < a.depth())) {
                             result.add(this.move(a, dest));
                         }
                     }
@@ -133,7 +133,7 @@ List<State> moves() {
         }
 
         boolean isFinal() {
-            return !amphipods.stream().anyMatch(it -> it.pos() != ((it.type() - 'A') * 2 + 2));
+            return amphipods.stream().noneMatch(it -> it.pos() != ((it.type() - 'A') * 2 + 2));
         }
 
         public boolean equals(Object other) {

diff --git a/d9.java b/d9.java
@@ -1,7 +1,6 @@
 import java.io.BufferedReader;
 import java.io.InputStreamReader;
 import java.util.*;
-import java.util.stream.Collectors;
 
 import static java.lang.System.out;
 
@@ -10,7 +9,7 @@ public static void main(String[] args) {
         var reader = new BufferedReader(new InputStreamReader(System.in));
         var field = new Field(reader);
         out.println(field.risk());
-        var sizes = field.basins().stream().sorted().collect(Collectors.toList());
+        var sizes = field.basins().stream().sorted().toList();
         out.println(sizes.get(sizes.size() - 1) * sizes.get(sizes.size() - 2) * sizes.get(sizes.size() - 3));
     }