From 1546b2cdebc1ba7436df723f1b3225b7dfb76eed Mon Sep 17 00:00:00 2001
From: David Ashby <delta.mu.alpha@gmail.com>
Date: Mon, 1 Dec 2025 21:11:04 -0500
Subject: [PATCH] use switch assignment

---
 src/Day01.java | 38 ++++++++++++++------------------------
 1 file changed, 14 insertions(+), 24 deletions(-)

diff --git a/src/Day01.java b/src/Day01.java
index f1eee64..7f15b5c 100644
--- a/src/Day01.java
+++ b/src/Day01.java
@@ -16,14 +16,11 @@ public class Day01 {
             while (scanner.hasNextLine()) {
                 String instruction = scanner.nextLine();
                 int change = Integer.parseInt(instruction.substring(1));
-                switch (instruction.charAt(0)) {
-                    case 'L' -> {
-                        dial = (dial - change + 100) % 100;
-                    }
-                    case 'R' -> {
-                        dial = (dial + change) % 100;
-                    }
-                }
+                dial = switch (instruction.charAt(0)) {
+                    case 'L' -> (dial - change + 100) % 100;
+                    case 'R' -> (dial + change) % 100;
+                    default -> dial; // impossible
+                };
                 if (dial == 0) {
                     password += 1;
                 }
@@ -42,22 +39,15 @@ public class Day01 {
             while (scanner.hasNextLine()) {
                 String instruction = scanner.nextLine();
                 int change = Integer.parseInt(instruction.substring(1));
-                switch (instruction.charAt(0)) {
-                    case 'L' -> {
-                        for (int i = 0; i < change; i++) {
-                            dial = (dial - 1) % 100;
-                            if (dial == 0) {
-                                password += 1;
-                            }
-                        }
-                    }
-                    case 'R' -> {
-                        for (int i = 0; i < change; i++) {
-                            dial = (dial + 1) % 100;
-                            if (dial == 0) {
-                                password += 1;
-                            }
-                        }
+                int step = switch (instruction.charAt(0)) {
+                    case 'L' -> -1;
+                    case 'R' -> 1;
+                    default -> 0; // impossible
+                };
+                for (int i = 0; i < change; i++) {
+                    dial = (dial + step) % 100;
+                    if (dial == 0) {
+                        password += 1;
                     }
                 }
             }