diff --git a/README.md b/README.md
index a4066ee..0237d94 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ my 2024 solutions on ~~glitch: [meowing-holy-carbon](https://meowing-holy-carbon
also on github: [dieseltravis/aoc2024](https://github.com/dieseltravis/aoc2024)
-[](https://adventofcode.com/2024/) [](https://github.com/dieseltravis/aoc2024/actions/workflows/node.js.yml) [](https://github.com/standard/semistandard)
+[](https://github.com/dieseltravis/aoc2024/actions/workflows/node.js.yml) [](https://github.com/standard/semistandard)
## solutions:
Install node `>18.18.x`, `yarn`, run `yarn install`, and then `yarn start`.
diff --git a/package.json b/package.json
index f441f6b..ee9a929 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
{
"name": "meowing-holy-carbon",
- "version": "2024.12.06",
+ "version": "2024.12.07",
"description": "Travis's Advent of Code 2024",
"author": "Travis Hardiman",
"homepage": "https://github.com/dieseltravis/aoc2024/",
diff --git a/public/funs.js b/public/funs.js
index 4ba8492..5793e8d 100644
--- a/public/funs.js
+++ b/public/funs.js
@@ -477,8 +477,73 @@
}
},
day7: {
- part1: d => d,
- part2: d => d
+ part1: (data) => {
+ const input = data.trim().split('\n').map(r => {
+ const row = r.split(':').map(p => p.trim());
+ return {
+ key: +row[0],
+ vals: row[1].split(' ').map(Number)
+ };
+ });
+ console.log(input);
+ const ops = [
+ (a, b) => a + b,
+ (a, b) => a * b
+ ];
+ const good = [];
+ for (let l = input.length; l--;) {
+ const key = input[l].key;
+ const vals = input[l].vals;
+ const valen = vals.length;
+ for (let dec = Math.pow(2, valen - 1); dec--;) {
+ const bin = dec.toString(2).padStart(valen - 1, '0').split('').map(Number);
+ let test = vals[0];
+ for (let i = 1; i < valen; i++) {
+ test = ops[bin[i - 1]](test, vals[i]);
+ }
+ if (key === test) {
+ good.push(key);
+ break;
+ }
+ }
+ }
+ const sum = good.reduce((acc, n) => acc + n, 0);
+ return sum;
+ },
+ part2: (data) => {
+ const input = data.trim().split('\n').map(r => {
+ const row = r.split(':').map(p => p.trim());
+ return {
+ key: +row[0],
+ vals: row[1].split(' ').map(Number)
+ };
+ });
+ console.log(input);
+ const ops = [
+ (a, b) => a + b,
+ (a, b) => a * b,
+ (a, b) => +(a + '' + b)
+ ];
+ const good = [];
+ for (let l = input.length; l--;) {
+ const key = input[l].key;
+ const vals = input[l].vals;
+ const valen = vals.length;
+ for (let dec = Math.pow(3, valen - 1); dec--;) {
+ const bin = dec.toString(3).padStart(valen - 1, '0').split('').map(Number);
+ let test = vals[0];
+ for (let i = 1; i < valen; i++) {
+ test = ops[bin[i - 1]](test, vals[i]);
+ }
+ if (key === test) {
+ good.push(key);
+ break;
+ }
+ }
+ }
+ const sum = good.reduce((acc, n) => acc + n, 0);
+ return sum;
+ }
},
day8: {
part1: d => d,
diff --git a/views/index.html b/views/index.html
index 40b870c..4456bde 100644
--- a/views/index.html
+++ b/views/index.html
@@ -28,6 +28,7 @@ solutions:
day 06