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days 11-16

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Tim Stallard
2017-12-16 12:12:56 +00:00
parent 492bdb29fd
commit d5fbba3277
16 changed files with 2313 additions and 0 deletions
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1
day16/input.txt Normal file
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day16/part1.js Normal file
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var items = "abcdefghijklmnop".split("");
s = (i) => {items = items.splice(-i).concat(items);}
x = (a,b) => {[items[a], items[b]] = [items[b], items[a]]}
p = (a,b) => {x(items.indexOf(a), items.indexOf(b))}
var input = require("fs").readFileSync("input.txt").toString().replace("\n", "");
var input = "," + input + ",";
var expr = input.replace(/,/g, ");").replace(/;([sxp])/g, ";$1(").replace(/([a-z])\/([a-z])/g, "'$1'/'$2'").replace(/\//g, ",");
expr = expr.substring(2);
eval(expr);
console.log(items.join(""));

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day16/part2.js Normal file
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var items = "abcdefghijklmnop".split("");
s = (i) => {items = items.splice(-i).concat(items);}
x = (a,b) => {[items[a], items[b]] = [items[b], items[a]]}
p = (a,b) => {x(items.indexOf(a), items.indexOf(b))}
var input = require("fs").readFileSync("input.txt").toString().replace("\n", "");
var input = "," + input + ",";
var expr = input.replace(/,/g, ");").replace(/;([sxp])/g, ";$1(").replace(/([a-z])\/([a-z])/g, "'$1'/'$2'").replace(/\//g, ",");
expr = expr.substring(2);
var state = "";
var states = [];
while(states.indexOf(state) == -1){
states.push(state);
eval(expr);
state = items.join("");
}
states = states.filter((a)=>(a));
var num = 1000000000;
console.log(states[(num-1)%states.length]);