2025/1

Signed-off-by: Alix von Schirp <github@avonschirp.bootmedia.de>

src/2025/1/1/index.ts

@@ -0,0 +1,24 @@
+export default async function runner(inputPath: string){
+  const input = (await Bun.file(inputPath).text()).trimEnd();
+  
+  let pos = 50;
+  
+  let pass = 0;
+  input.split("\n").forEach(line => {
+    if(line.trim() === "") return;
+    if(line[0] === "L") {
+      const num = parseInt(line.substring(1));
+      pos -= num;
+    }
+    if(line[0] === "R") {
+      const num = parseInt(line.substring(1));
+      pos += num;
+    }
+    
+    while(pos<0) pos += 100;
+    if (pos > 99) pos = pos % 100;
+    if(pos === 0) pass++;
+  })
+  
+  console.log(pass);
+}

src/2025/1/2/index.ts

@@ -0,0 +1,37 @@
+export default async function runner(inputPath: string){
+  const input = (await Bun.file(inputPath).text()).trimEnd();
+  
+  let pos = 50;
+  
+  let pass = 0;
+  input.split("\n").forEach(line => {
+    let oldpos = pos;
+    if(line.trim() === "") return;
+    const num = parseInt(line.substring(1));
+    const turns = Math.floor(num/100);
+    const amount = num % 100;
+    
+    pass += turns;
+    
+    if(line[0] === "L") {
+      pos -= amount;
+    }
+    if(line[0] === "R") {
+      pos += amount;
+    }
+    
+    
+    
+    if(pos === 0) pass++;
+    while(pos<0) {
+      pos += 100;
+      if(oldpos !== 0) pass++;
+    }
+    if (pos > 99) {
+      pos = pos % 100;
+      if(oldpos !== 0) pass++;
+    }
+  })
+  
+  console.log(pass);
+}