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-rw-r--r--2022/20-Grove-Positioning-System/.eslintrc.json44
-rw-r--r--2022/20-Grove-Positioning-System/example7
-rw-r--r--2022/20-Grove-Positioning-System/first.js88
-rw-r--r--2022/20-Grove-Positioning-System/input5000
-rw-r--r--2022/20-Grove-Positioning-System/package.json11
-rw-r--r--2022/20-Grove-Positioning-System/second.js90
6 files changed, 5240 insertions, 0 deletions
diff --git a/2022/20-Grove-Positioning-System/.eslintrc.json b/2022/20-Grove-Positioning-System/.eslintrc.json
new file mode 100644
index 0000000..81e57d1
--- /dev/null
+++ b/2022/20-Grove-Positioning-System/.eslintrc.json
@@ -0,0 +1,44 @@
+{
+ "env": {
+ "es2021": true,
+ "node": true
+ },
+ "extends": [
+ "eslint:recommended",
+ "plugin:node/recommended"
+ ],
+ "overrides": [
+ {
+ "files": ["*.js"],
+ "rules": {
+ "no-constant-condition": "off"
+ }
+ }
+ ],
+ "parserOptions": {
+ "ecmaVersion": "latest",
+ "sourceType": "module"
+ },
+ "rules": {
+ "indent": [
+ "error",
+ "tab"
+ ],
+ "linebreak-style": [
+ "error",
+ "unix"
+ ],
+ "quotes": [
+ "error",
+ "double"
+ ],
+ "semi": [
+ "error",
+ "always"
+ ],
+ "node/no-unsupported-features/es-syntax": [
+ "error",
+ { "ignores": ["modules"] }
+ ]
+ }
+}
diff --git a/2022/20-Grove-Positioning-System/example b/2022/20-Grove-Positioning-System/example
new file mode 100644
index 0000000..52c68ff
--- /dev/null
+++ b/2022/20-Grove-Positioning-System/example
@@ -0,0 +1,7 @@
+1
+2
+-3
+3
+-2
+0
+4
diff --git a/2022/20-Grove-Positioning-System/first.js b/2022/20-Grove-Positioning-System/first.js
new file mode 100644
index 0000000..7a49d57
--- /dev/null
+++ b/2022/20-Grove-Positioning-System/first.js
@@ -0,0 +1,88 @@
+import * as fs from "fs";
+
+class File {
+ constructor(line) {
+ this.length = line.length;
+ this.data = line.map(v => ({value: v})); // index in data
+ this.data[0].left = this.data[this.length-1];
+ this.data[0].right = this.data[1];
+ this.data[this.length-1].left = this.data[this.length-2];
+ this.data[this.length-1].right = this.data[0];
+ for (let i=1; i<this.length-1; ++i) {
+ this.data[i].left = this.data[i-1];
+ this.data[i].right = this.data[i+1];
+ }
+ this.data.forEach(v => { if (v.value === 0) this.head = v; });
+ }
+ get(i) {
+ let it = this.head;
+ for (let offset = i % this.length; offset > 0; --offset) {
+ it = it.right;
+ }
+ return it.value;
+ }
+ mix() {
+ this.data.forEach(v => {
+ if (v.value !== 0) {
+ let it = v;
+ let offset; // javascript and modulo... what a nightmare!
+ if (v.value > 0) offset = v.value % (this.length - 1);
+ if (v.value < 0) offset = ((v.value * -1) % (this.length - 1)) * -1;
+ if (offset !==0) {
+ v.right.left = v.left;
+ v.left.right = v.right;
+ if (offset < 0) {
+ for (; offset < 0; ++offset) {
+ it = it.left;
+ }
+ v.right = it;
+ v.left = it.left;
+ v.left.right = v;
+ v.right.left = v;
+ } else {
+ for (; offset > 0; --offset) {
+ it = it.right;
+ }
+ v.right = it.right;
+ v.left = it;
+ v.left.right = v;
+ v.right.left = v;
+ }
+ }
+ }
+ });
+ }
+ print() {
+ let it = this.head;
+ for (let offset = this.length; offset > 0; --offset) {
+ console.log(it.value);
+ it = it.right;
+ }
+ console.log("---");
+ }
+}
+
+function load(filename) {
+ return new File(
+ fs.readFileSync(filename, "utf8")
+ .trim()
+ .split("\n")
+ .map(line => parseInt(line))
+ );
+}
+
+let example = load("example");
+let input = load("input");
+
+function solve(input) {
+ input.mix();
+ return input.get(1000) + input.get(2000) + input.get(3000);
+}
+
+const exampleOutput = solve(example);
+if (exampleOutput !== 3) {
+ console.log("Example failed with " + exampleOutput);
+ process.exit(1); // eslint-disable-line
+}
+
+console.log(solve(input));
diff --git a/2022/20-Grove-Positioning-System/input b/2022/20-Grove-Positioning-System/input
new file mode 100644
index 0000000..701ca66
--- /dev/null
+++ b/2022/20-Grove-Positioning-System/input
@@ -0,0 +1,5000 @@
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diff --git a/2022/20-Grove-Positioning-System/package.json b/2022/20-Grove-Positioning-System/package.json
new file mode 100644
index 0000000..23be024
--- /dev/null
+++ b/2022/20-Grove-Positioning-System/package.json
@@ -0,0 +1,11 @@
+{
+ "type": "module",
+ "engines": {
+ "node": ">=18.10.0"
+ },
+ "dependencies": {
+ "eslint": "^8.30.0",
+ "eslint-plugin-node": "^11.1.0",
+ "jslint": "^0.12.1"
+ }
+}
diff --git a/2022/20-Grove-Positioning-System/second.js b/2022/20-Grove-Positioning-System/second.js
new file mode 100644
index 0000000..a01acc4
--- /dev/null
+++ b/2022/20-Grove-Positioning-System/second.js
@@ -0,0 +1,90 @@
+import * as fs from "fs";
+
+class File {
+ constructor(line) {
+ this.length = line.length;
+ this.data = line.map(v => ({value: v * 811589153})); // index in data
+ this.data[0].left = this.data[this.length-1];
+ this.data[0].right = this.data[1];
+ this.data[this.length-1].left = this.data[this.length-2];
+ this.data[this.length-1].right = this.data[0];
+ for (let i=1; i<this.length-1; ++i) {
+ this.data[i].left = this.data[i-1];
+ this.data[i].right = this.data[i+1];
+ }
+ this.data.forEach(v => { if (v.value === 0) this.head = v; });
+ }
+ get(i) {
+ let it = this.head;
+ for (let offset = i % this.length; offset > 0; --offset) {
+ it = it.right;
+ }
+ return it.value;
+ }
+ mix() {
+ this.data.forEach(v => {
+ if (v.value !== 0) {
+ let it = v;
+ let offset; // javascript and modulo... what a nightmare!
+ if (v.value > 0) offset = v.value % (this.length - 1);
+ if (v.value < 0) offset = ((v.value * -1) % (this.length - 1)) * -1;
+ if (offset !==0) {
+ v.right.left = v.left;
+ v.left.right = v.right;
+ if (offset < 0) {
+ for (; offset < 0; ++offset) {
+ it = it.left;
+ }
+ v.right = it;
+ v.left = it.left;
+ v.left.right = v;
+ v.right.left = v;
+ } else {
+ for (; offset > 0; --offset) {
+ it = it.right;
+ }
+ v.right = it.right;
+ v.left = it;
+ v.left.right = v;
+ v.right.left = v;
+ }
+ }
+ }
+ });
+ }
+ print() {
+ let it = this.head;
+ for (let offset = this.length; offset > 0; --offset) {
+ console.log(it.value);
+ it = it.right;
+ }
+ console.log("---");
+ }
+}
+
+function load(filename) {
+ return new File(
+ fs.readFileSync(filename, "utf8")
+ .trim()
+ .split("\n")
+ .map(line => parseInt(line))
+ );
+}
+
+let example = load("example");
+let input = load("input");
+
+function solve(input) {
+ for (let i=0; i<10; ++i) {
+ input.mix();
+ }
+ return input.get(1000) + input.get(2000) + input.get(3000);
+}
+
+const exampleOutput = solve(example);
+if (exampleOutput !== 1623178306) {
+ console.log("Example failed with " + exampleOutput);
+ process.exit(1); // eslint-disable-line
+}
+
+console.log(solve(input));
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 23:06:34 +0000