From 6416444df1480418f8c00db5a09d3626db0eb6c0 Mon Sep 17 00:00:00 2001 From: Seth Etter Date: Mon, 21 Dec 2015 22:29:14 -0600 Subject: [PATCH] Day 7, part 1 --- index.js | 13 ++ input/day7.txt | 339 ++++++++++++++++++++++++++++++++++++++++++++++ lib/day7.js | 72 ++++++++++ spec/day7.spec.js | 77 +++++++++++ 4 files changed, 501 insertions(+) create mode 100644 input/day7.txt create mode 100644 lib/day7.js create mode 100644 spec/day7.spec.js diff --git a/index.js b/index.js index 826646a..64c8b6e 100644 --- a/index.js +++ b/index.js @@ -66,3 +66,16 @@ day6Input.split('\n').forEach(function(instruction) { }); var totalBrightness = Day6.totalBrightness(grid2); console.log('Day 6, Part 2:', totalBrightness); + +/** + * Day 7! + * ----------------------------------- + */ +var Day7 = require('./lib/day7'); +var day7Input = fs.readFileSync('./input/day7.txt', 'utf8'); + +day7Input.split('\n').forEach(function(instruction) { + Day7.processInstruction(instruction); +}); + +console.log('Day 7, Part 1:', Day7.getWireSignal('a')); diff --git a/input/day7.txt b/input/day7.txt new file mode 100644 index 0000000..56cae92 --- /dev/null +++ b/input/day7.txt @@ -0,0 +1,339 @@ +af AND ah -> ai +NOT lk -> ll +hz RSHIFT 1 -> is +NOT go -> gp +du OR dt -> dv +x RSHIFT 5 -> aa +at OR az -> ba +eo LSHIFT 15 -> es +ci OR ct -> cu +b RSHIFT 5 -> f +fm OR fn -> fo +NOT ag -> ah +v OR w -> x +g AND i -> j +an LSHIFT 15 -> ar +1 AND cx -> cy +jq AND jw -> jy +iu RSHIFT 5 -> ix +gl AND gm -> go +NOT bw -> bx +jp RSHIFT 3 -> jr +hg AND hh -> hj +bv AND bx -> by +er OR es -> et +kl OR kr -> ks +et RSHIFT 1 -> fm +e AND f -> h +u LSHIFT 1 -> ao +he RSHIFT 1 -> hx +eg AND ei -> ej +bo AND bu -> bw +dz OR ef -> eg +dy RSHIFT 3 -> ea +gl OR gm -> gn +da LSHIFT 1 -> du +au OR av -> aw +gj OR gu -> gv +eu OR fa -> fb +lg OR lm -> ln +e OR f -> g +NOT dm -> dn +NOT l -> m +aq OR ar -> as +gj RSHIFT 5 -> gm +hm AND ho -> hp +ge LSHIFT 15 -> gi +jp RSHIFT 1 -> ki +hg OR hh -> hi +lc LSHIFT 1 -> lw +km OR kn -> ko +eq LSHIFT 1 -> fk +1 AND am -> an +gj RSHIFT 1 -> hc +aj AND al -> am +gj AND gu -> gw +ko AND kq -> kr +ha OR gz -> hb +bn OR by -> bz +iv OR jb -> jc +NOT ac -> ad +bo OR bu -> bv +d AND j -> l +bk LSHIFT 1 -> ce +de OR dk -> dl +dd RSHIFT 1 -> dw +hz AND ik -> im +NOT jd -> je +fo RSHIFT 2 -> fp +hb LSHIFT 1 -> hv +lf RSHIFT 2 -> lg +gj RSHIFT 3 -> gl +ki OR kj -> kk +NOT ak -> al +ld OR le -> lf +ci RSHIFT 3 -> ck +1 AND cc -> cd +NOT kx -> ky +fp OR fv -> fw +ev AND ew -> ey +dt LSHIFT 15 -> dx +NOT ax -> ay +bp AND bq -> bs +NOT ii -> ij +ci AND ct -> cv +iq OR ip -> ir +x RSHIFT 2 -> y +fq OR fr -> fs +bn RSHIFT 5 -> bq +0 -> c +14146 -> b +d OR j -> k +z OR aa -> ab +gf OR ge -> gg +df OR dg -> dh +NOT hj -> hk +NOT di -> dj +fj LSHIFT 15 -> fn +lf RSHIFT 1 -> ly +b AND n -> p +jq OR jw -> jx +gn AND gp -> gq +x RSHIFT 1 -> aq +ex AND ez -> fa +NOT fc -> fd +bj OR bi -> bk +as RSHIFT 5 -> av +hu LSHIFT 15 -> hy +NOT gs -> gt +fs AND fu -> fv +dh AND dj -> dk +bz AND cb -> cc +dy RSHIFT 1 -> er +hc OR hd -> he +fo OR fz -> ga +t OR s -> u +b RSHIFT 2 -> d +NOT jy -> jz +hz RSHIFT 2 -> ia +kk AND kv -> kx +ga AND gc -> gd +fl LSHIFT 1 -> gf +bn AND by -> ca +NOT hr -> hs +NOT bs -> bt +lf RSHIFT 3 -> lh +au AND av -> ax +1 AND gd -> ge +jr OR js -> jt +fw AND fy -> fz +NOT iz -> ja +c LSHIFT 1 -> t +dy RSHIFT 5 -> eb +bp OR bq -> br +NOT h -> i +1 AND ds -> dt +ab AND ad -> ae +ap LSHIFT 1 -> bj +br AND bt -> bu +NOT ca -> cb +NOT el -> em +s LSHIFT 15 -> w +gk OR gq -> gr +ff AND fh -> fi +kf LSHIFT 15 -> kj +fp AND fv -> fx +lh OR li -> lj +bn RSHIFT 3 -> bp +jp OR ka -> kb +lw OR lv -> lx +iy AND ja -> jb +dy OR ej -> ek +1 AND bh -> bi +NOT kt -> ku +ao OR an -> ap +ia AND ig -> ii +NOT ey -> ez +bn RSHIFT 1 -> cg +fk OR fj -> fl +ce OR cd -> cf +eu AND fa -> fc +kg OR kf -> kh +jr AND js -> ju +iu RSHIFT 3 -> iw +df AND dg -> di +dl AND dn -> do +la LSHIFT 15 -> le +fo RSHIFT 1 -> gh +NOT gw -> gx +NOT gb -> gc +ir LSHIFT 1 -> jl +x AND ai -> ak +he RSHIFT 5 -> hh +1 AND lu -> lv +NOT ft -> fu +gh OR gi -> gj +lf RSHIFT 5 -> li +x RSHIFT 3 -> z +b RSHIFT 3 -> e +he RSHIFT 2 -> hf +NOT fx -> fy +jt AND jv -> jw +hx OR hy -> hz +jp AND ka -> kc +fb AND fd -> fe +hz OR ik -> il +ci RSHIFT 1 -> db +fo AND fz -> gb +fq AND fr -> ft +gj RSHIFT 2 -> gk +cg OR ch -> ci +cd LSHIFT 15 -> ch +jm LSHIFT 1 -> kg +ih AND ij -> ik +fo RSHIFT 3 -> fq +fo RSHIFT 5 -> fr +1 AND fi -> fj +1 AND kz -> la +iu AND jf -> jh +cq AND cs -> ct +dv LSHIFT 1 -> ep +hf OR hl -> hm +km AND kn -> kp +de AND dk -> dm +dd RSHIFT 5 -> dg +NOT lo -> lp +NOT ju -> jv +NOT fg -> fh +cm AND co -> cp +ea AND eb -> ed +dd RSHIFT 3 -> df +gr AND gt -> gu +ep OR eo -> eq +cj AND cp -> cr +lf OR lq -> lr +gg LSHIFT 1 -> ha +et RSHIFT 2 -> eu +NOT jh -> ji +ek AND em -> en +jk LSHIFT 15 -> jo +ia OR ig -> ih +gv AND gx -> gy +et AND fe -> fg +lh AND li -> lk +1 AND io -> ip +kb AND kd -> ke +kk RSHIFT 5 -> kn +id AND if -> ig +NOT ls -> lt +dw OR dx -> dy +dd AND do -> dq +lf AND lq -> ls +NOT kc -> kd +dy AND ej -> el +1 AND ke -> kf +et OR fe -> ff +hz RSHIFT 5 -> ic +dd OR do -> dp +cj OR cp -> cq +NOT dq -> dr +kk RSHIFT 1 -> ld +jg AND ji -> jj +he OR hp -> hq +hi AND hk -> hl +dp AND dr -> ds +dz AND ef -> eh +hz RSHIFT 3 -> ib +db OR dc -> dd +hw LSHIFT 1 -> iq +he AND hp -> hr +NOT cr -> cs +lg AND lm -> lo +hv OR hu -> hw +il AND in -> io +NOT eh -> ei +gz LSHIFT 15 -> hd +gk AND gq -> gs +1 AND en -> eo +NOT kp -> kq +et RSHIFT 5 -> ew +lj AND ll -> lm +he RSHIFT 3 -> hg +et RSHIFT 3 -> ev +as AND bd -> bf +cu AND cw -> cx +jx AND jz -> ka +b OR n -> o +be AND bg -> bh +1 AND ht -> hu +1 AND gy -> gz +NOT hn -> ho +ck OR cl -> cm +ec AND ee -> ef +lv LSHIFT 15 -> lz +ks AND ku -> kv +NOT ie -> if +hf AND hl -> hn +1 AND r -> s +ib AND ic -> ie +hq AND hs -> ht +y AND ae -> ag +NOT ed -> ee +bi LSHIFT 15 -> bm +dy RSHIFT 2 -> dz +ci RSHIFT 2 -> cj +NOT bf -> bg +NOT im -> in +ev OR ew -> ex +ib OR ic -> id +bn RSHIFT 2 -> bo +dd RSHIFT 2 -> de +bl OR bm -> bn +as RSHIFT 1 -> bl +ea OR eb -> ec +ln AND lp -> lq +kk RSHIFT 3 -> km +is OR it -> iu +iu RSHIFT 2 -> iv +as OR bd -> be +ip LSHIFT 15 -> it +iw OR ix -> iy +kk RSHIFT 2 -> kl +NOT bb -> bc +ci RSHIFT 5 -> cl +ly OR lz -> ma +z AND aa -> ac +iu RSHIFT 1 -> jn +cy LSHIFT 15 -> dc +cf LSHIFT 1 -> cz +as RSHIFT 3 -> au +cz OR cy -> da +kw AND ky -> kz +lx -> a +iw AND ix -> iz +lr AND lt -> lu +jp RSHIFT 5 -> js +aw AND ay -> az +jc AND je -> jf +lb OR la -> lc +NOT cn -> co +kh LSHIFT 1 -> lb +1 AND jj -> jk +y OR ae -> af +ck AND cl -> cn +kk OR kv -> kw +NOT cv -> cw +kl AND kr -> kt +iu OR jf -> jg +at AND az -> bb +jp RSHIFT 2 -> jq +iv AND jb -> jd +jn OR jo -> jp +x OR ai -> aj +ba AND bc -> bd +jl OR jk -> jm +b RSHIFT 1 -> v +o AND q -> r +NOT p -> q +k AND m -> n +as RSHIFT 2 -> at diff --git a/lib/day7.js b/lib/day7.js new file mode 100644 index 0000000..11e363a --- /dev/null +++ b/lib/day7.js @@ -0,0 +1,72 @@ +var R_INSTRUCTION_PARSER = /^([0-9a-z]+)?\s*([A-Z]+)?\s*([0-9a-z]+)?\s+\->\s+([a-z]+)$/; + +var wires = {}; + +module.exports = { + + processInstruction: function(instruction) { + if (!instruction.match(R_INSTRUCTION_PARSER)) return; + var parts = this.parseParts(instruction); + this.registerWire(parts); + }, + + parseParts: function(instruction) { + var parts = instruction.match(R_INSTRUCTION_PARSER); + + parts[1] = convertToNumberIfNumber(parts[1]); + parts[3] = convertToNumberIfNumber(parts[3]); + + var returnObj = { + // convert missing input1 to null instead of undefined + input1: typeof(parts[1]) === 'undefined' ? null : parts[1], + input2: typeof(parts[3]) === 'undefined' ? null : parts[3], + operation: typeof(parts[2]) === 'undefined' ? null : parts[2], + output: parts[4] + }; + + return returnObj; + }, + + registerWire: function(parts) { + wires[parts.output] = function() { + var getInput1 = useNumberOrWireInput(parts.input1); + var getInput2 = useNumberOrWireInput(parts.input2); + + var result; + + if (parts.operation !== 'NOT') { + switch(parts.operation) { + case 'AND': result = getInput1() & getInput2(); break; + case 'OR': result = getInput1() | getInput2(); break; + case 'LSHIFT': result = getInput1() << getInput2(); break; + case 'RSHIFT': result = getInput1() >> getInput2(); break; + case null: result = getInput1(); break; + } + } else { + result = getInput2() ^ 65535 + } + + wires[parts.output] = function() { return result }; + return result; + }; + }, + + getWireSignal: function(wire) { + return wires[wire](); + }, + + resetWires: function() { wires = {} } + +}; + +function convertToNumberIfNumber(x) { + return parseInt(x) == x ? parseInt(x) : x; +} + +function useNumberOrWireInput(input) { + if (typeof(input) === 'number') { + return function() { return input }; + } else { + return function() { return wires[input]() }; + } +} diff --git a/spec/day7.spec.js b/spec/day7.spec.js new file mode 100644 index 0000000..66ce7f8 --- /dev/null +++ b/spec/day7.spec.js @@ -0,0 +1,77 @@ +var expect = require('chai').expect; +var Day7 = require('../lib/day7'); + +describe('Day7', function() { + + it('does the thing', function() { + var instructions = [ + 'x AND y -> d', + 'x OR y -> e', + '123 -> x', + '456 -> y', + 'x LSHIFT 2 -> f', + 'y RSHIFT 2 -> g', + 'NOT x -> h', + 'NOT y -> i' + ]; + + instructions.forEach(function(instruction) { + Day7.processInstruction(instruction); + }); + + expect(Day7.getWireSignal('x')).to.equal(123); + expect(Day7.getWireSignal('y')).to.equal(456); + expect(Day7.getWireSignal('d')).to.equal(72); + expect(Day7.getWireSignal('e')).to.equal(507); + expect(Day7.getWireSignal('f')).to.equal(492); + expect(Day7.getWireSignal('g')).to.equal(114); + expect(Day7.getWireSignal('h')).to.equal(65412); + expect(Day7.getWireSignal('i')).to.equal(65079); + }); + + + describe('#parseParts', function() { + it('breaks instruction into parts', function() { + var instruction1 = 'fl LSHIFT 1 -> gf'; + var instruction2 = '1 AND ds -> dt'; + var instruction3 = 'NOT kt -> ku'; + var instruction4 = 'lv LSHIFT 15 -> lz'; + var instruction5 = 'la -> aa'; + + expect(Day7.parseParts(instruction1)).to.eql({ + input1: 'fl', + input2: 1, + operation: 'LSHIFT', + output: 'gf' + }); + + expect(Day7.parseParts(instruction2)).to.eql({ + input1: 1, + input2: 'ds', + operation: 'AND', + output: 'dt' + }); + + expect(Day7.parseParts(instruction3)).to.eql({ + input1: null, + input2: 'kt', + operation: 'NOT', + output: 'ku' + }); + + expect(Day7.parseParts(instruction4)).to.eql({ + input1: 'lv', + input2: 15, + operation: 'LSHIFT', + output: 'lz' + }); + + expect(Day7.parseParts(instruction5)).to.eql({ + input1: 'la', + input2: null, + operation: null, + output: 'aa' + }); + }); + }); +}); -- 2.51.2